Unexported object imported by a ':::' call: 'ltm:::crf.GPCM'
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for 'integrate'
Jeffreys: no visible global function definition for 'splinefun'
count.rows: no visible global function definition for 'tail'
count.rows: no visible global function definition for 'head'
cprobs : <anonymous>: no visible global function definition for
  'plogis'
inf.func.ltm : f: no visible global function definition for 'plogis'
iota: no visible global function definition for 'integrate'
iota: no visible global function definition for 'optimize'
iota: no visible global function definition for 'pchisq'
iota.c : rirm: no visible global function definition for 'coef'
iota.c: no visible global function definition for 'integrate'
iota.c: no visible global function definition for 'sd'
iota.u: no visible global function definition for 'integrate'
iprobs : <anonymous>: no visible global function definition for
  'plogis'
logL.ltm : logL: no visible global function definition for 'dbinom'
logL.ltm : logL: no visible global function definition for 'plogis'
logL.ltm : logL : <anonymous>: no visible global function definition
  for 'plogis'
rJeffreys : Jpinv.min: no visible global function definition for
  'integrate'
rJeffreys : Jpinv: no visible global function definition for 'nlminb'
rJeffreys : Jpinv: no visible global function definition for 'qnorm'
rJeffreys: no visible global function definition for 'runif'
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Rd file 'Jeffreys.Rd':
  \usage lines wider than 90 characters:
     Jeffreys(ltm.obj = NULL, inf.mat = NULL, inf.func = NULL, return = "prior", spl.method = "natural", range.int = c(-Inf, Inf))

Rd file 'iota.Rd':
  \usage lines wider than 90 characters:
     iota(ltm.obj, logL.fun, fscore.obj = NULL, data = NULL, prior = NULL, theta0 = NULL, range.int = c(-Inf, Inf), range.theta = c(-10, 10) ... [TRUNCATED]

Rd file 'iota.c.Rd':
  \usage lines wider than 90 characters:
     iota.c(ltm.obj, M = NULL, prior = NULL, logL.fun = NULL, rirm = NULL, range.int = c(-Inf, Inf))

These lines will be truncated in the PDF manual.
Unexported object imported by a ‘:::’ call: ‘ltm:::crf.GPCM’
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for ‘integrate’
Jeffreys: no visible global function definition for ‘splinefun’
count.rows: no visible global function definition for ‘tail’
count.rows: no visible global function definition for ‘head’
cprobs : <anonymous>: no visible global function definition for
  ‘plogis’
inf.func.ltm : f: no visible global function definition for ‘plogis’
iota: no visible global function definition for ‘integrate’
iota: no visible global function definition for ‘optimize’
iota: no visible global function definition for ‘pchisq’
iota.c : rirm: no visible global function definition for ‘coef’
iota.c: no visible global function definition for ‘integrate’
iota.c: no visible global function definition for ‘sd’
iota.u: no visible global function definition for ‘integrate’
iprobs : <anonymous>: no visible global function definition for
  ‘plogis’
logL.ltm : logL: no visible global function definition for ‘dbinom’
logL.ltm : logL: no visible global function definition for ‘plogis’
logL.ltm : logL : <anonymous>: no visible global function definition
  for ‘plogis’
rJeffreys : Jpinv.min: no visible global function definition for
  ‘integrate’
rJeffreys : Jpinv: no visible global function definition for ‘nlminb’
rJeffreys : Jpinv: no visible global function definition for ‘qnorm’
rJeffreys: no visible global function definition for ‘runif’
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Rd file 'Jeffreys.Rd':
  \usage lines wider than 90 characters:
     Jeffreys(ltm.obj = NULL, inf.mat = NULL, inf.func = NULL, return = "prior", spl.method = "natural", range.int = c(-Inf, Inf))

Rd file 'iota.Rd':
  \usage lines wider than 90 characters:
     iota(ltm.obj, logL.fun, fscore.obj = NULL, data = NULL, prior = NULL, theta0 = NULL, range.int = c(-Inf, Inf), range.theta = c(-10, 10) ... [TRUNCATED]

Rd file 'iota.c.Rd':
  \usage lines wider than 90 characters:
     iota.c(ltm.obj, M = NULL, prior = NULL, logL.fun = NULL, rirm = NULL, range.int = c(-Inf, Inf))

These lines will be truncated in the PDF manual.
Unexported object imported by a ':::' call: ‘ltm:::crf.GPCM’
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for ‘integrate’
Jeffreys: no visible global function definition for ‘splinefun’
count.rows: no visible global function definition for ‘tail’
count.rows: no visible global function definition for ‘head’
cprobs : <anonymous>: no visible global function definition for
  ‘plogis’
inf.func.ltm : f: no visible global function definition for ‘plogis’
iota: no visible global function definition for ‘integrate’
iota: no visible global function definition for ‘optimize’
iota: no visible global function definition for ‘pchisq’
iota.c : rirm: no visible global function definition for ‘coef’
iota.c: no visible global function definition for ‘integrate’
iota.c: no visible global function definition for ‘sd’
iota.u: no visible global function definition for ‘integrate’
iprobs : <anonymous>: no visible global function definition for
  ‘plogis’
logL.ltm : logL: no visible global function definition for ‘dbinom’
logL.ltm : logL: no visible global function definition for ‘plogis’
logL.ltm : logL : <anonymous>: no visible global function definition
  for ‘plogis’
rJeffreys : Jpinv.min: no visible global function definition for
  ‘integrate’
rJeffreys : Jpinv: no visible global function definition for ‘nlminb’
rJeffreys : Jpinv: no visible global function definition for ‘qnorm’
rJeffreys: no visible global function definition for ‘runif’
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Rd file 'Jeffreys.Rd':
  \usage lines wider than 90 characters:
     Jeffreys(ltm.obj = NULL, inf.mat = NULL, inf.func = NULL, return = "prior", spl.method = "natural", range.int = c(-Inf, Inf))

Rd file 'iota.Rd':
  \usage lines wider than 90 characters:
     iota(ltm.obj, logL.fun, fscore.obj = NULL, data = NULL, prior = NULL, theta0 = NULL, range.int = c(-Inf, Inf), range.theta = c(-10, 10) ... [TRUNCATED]

Rd file 'iota.c.Rd':
  \usage lines wider than 90 characters:
     iota.c(ltm.obj, M = NULL, prior = NULL, logL.fun = NULL, rirm = NULL, range.int = c(-Inf, Inf))

These lines will be truncated in the PDF manual.
Unexported object imported by a ':::' call: ‘ltm:::crf.GPCM’
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for ‘integrate’
Jeffreys: no visible global function definition for ‘splinefun’
count.rows: no visible global function definition for ‘tail’
count.rows: no visible global function definition for ‘head’
cprobs : <anonymous>: no visible global function definition for
  ‘plogis’
inf.func.ltm : f: no visible global function definition for ‘plogis’
iota: no visible global function definition for ‘integrate’
iota: no visible global function definition for ‘optimize’
iota: no visible global function definition for ‘pchisq’
iota.c : rirm: no visible global function definition for ‘coef’
iota.c: no visible global function definition for ‘integrate’
iota.c: no visible global function definition for ‘sd’
iota.u: no visible global function definition for ‘integrate’
iprobs : <anonymous>: no visible global function definition for
  ‘plogis’
logL.ltm : logL: no visible global function definition for ‘dbinom’
logL.ltm : logL: no visible global function definition for ‘plogis’
logL.ltm : logL : <anonymous>: no visible global function definition
  for ‘plogis’
rJeffreys : Jpinv.min: no visible global function definition for
  ‘integrate’
rJeffreys : Jpinv: no visible global function definition for ‘nlminb’
rJeffreys : Jpinv: no visible global function definition for ‘qnorm’
rJeffreys: no visible global function definition for ‘runif’
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Rd file 'Jeffreys.Rd':
  \usage lines wider than 90 characters:
     Jeffreys(ltm.obj = NULL, inf.mat = NULL, inf.func = NULL, return = "prior", spl.method = "natural", range.int = c(-Inf, Inf))

Rd file 'iota.Rd':
  \usage lines wider than 90 characters:
     iota(ltm.obj, logL.fun, fscore.obj = NULL, data = NULL, prior = NULL, theta0 = NULL, range.int = c(-Inf, Inf), range.theta = c(-10, 10) ... [TRUNCATED]

Rd file 'iota.c.Rd':
  \usage lines wider than 90 characters:
     iota.c(ltm.obj, M = NULL, prior = NULL, logL.fun = NULL, rirm = NULL, range.int = c(-Inf, Inf))

These lines will be truncated in the PDF manual.
Unexported object imported by a ':::' call: 'ltm:::crf.GPCM'
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for 'integrate'
Jeffreys: no visible global function definition for 'splinefun'
count.rows: no visible global function definition for 'tail'
count.rows: no visible global function definition for 'head'
cprobs : <anonymous>: no visible global function definition for
  'plogis'
inf.func.ltm : f: no visible global function definition for 'plogis'
iota: no visible global function definition for 'integrate'
iota: no visible global function definition for 'optimize'
iota: no visible global function definition for 'pchisq'
iota.c : rirm: no visible global function definition for 'coef'
iota.c: no visible global function definition for 'integrate'
iota.c: no visible global function definition for 'sd'
iota.u: no visible global function definition for 'integrate'
iprobs : <anonymous>: no visible global function definition for
  'plogis'
logL.ltm : logL: no visible global function definition for 'dbinom'
logL.ltm : logL: no visible global function definition for 'plogis'
logL.ltm : logL : <anonymous>: no visible global function definition
  for 'plogis'
rJeffreys : Jpinv.min: no visible global function definition for
  'integrate'
rJeffreys : Jpinv: no visible global function definition for 'nlminb'
rJeffreys : Jpinv: no visible global function definition for 'qnorm'
rJeffreys: no visible global function definition for 'runif'
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Unexported object imported by a ‘:::’ call: ‘ltm:::crf.GPCM’
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for ‘integrate’
Jeffreys: no visible global function definition for ‘splinefun’
count.rows: no visible global function definition for ‘tail’
count.rows: no visible global function definition for ‘head’
cprobs : <anonymous>: no visible global function definition for
  ‘plogis’
inf.func.ltm : f: no visible global function definition for ‘plogis’
iota: no visible global function definition for ‘integrate’
iota: no visible global function definition for ‘optimize’
iota: no visible global function definition for ‘pchisq’
iota.c : rirm: no visible global function definition for ‘coef’
iota.c: no visible global function definition for ‘integrate’
iota.c: no visible global function definition for ‘sd’
iota.u: no visible global function definition for ‘integrate’
iprobs : <anonymous>: no visible global function definition for
  ‘plogis’
logL.ltm : logL: no visible global function definition for ‘dbinom’
logL.ltm : logL: no visible global function definition for ‘plogis’
logL.ltm : logL : <anonymous>: no visible global function definition
  for ‘plogis’
rJeffreys : Jpinv.min: no visible global function definition for
  ‘integrate’
rJeffreys : Jpinv: no visible global function definition for ‘nlminb’
rJeffreys : Jpinv: no visible global function definition for ‘qnorm’
rJeffreys: no visible global function definition for ‘runif’
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Rd file 'Jeffreys.Rd':
  \usage lines wider than 90 characters:
     Jeffreys(ltm.obj = NULL, inf.mat = NULL, inf.func = NULL, return = "prior", spl.method = "natural", range.int = c(-Inf, Inf))

Rd file 'iota.Rd':
  \usage lines wider than 90 characters:
     iota(ltm.obj, logL.fun, fscore.obj = NULL, data = NULL, prior = NULL, theta0 = NULL, range.int = c(-Inf, Inf), range.theta = c(-10, 10) ... [TRUNCATED]

Rd file 'iota.c.Rd':
  \usage lines wider than 90 characters:
     iota.c(ltm.obj, M = NULL, prior = NULL, logL.fun = NULL, rirm = NULL, range.int = c(-Inf, Inf))

These lines will be truncated in the PDF manual.
Unexported object imported by a ‘:::’ call: ‘ltm:::crf.GPCM’
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for ‘integrate’
Jeffreys: no visible global function definition for ‘splinefun’
count.rows: no visible global function definition for ‘tail’
count.rows: no visible global function definition for ‘head’
cprobs : <anonymous>: no visible global function definition for
  ‘plogis’
inf.func.ltm : f: no visible global function definition for ‘plogis’
iota: no visible global function definition for ‘integrate’
iota: no visible global function definition for ‘optimize’
iota: no visible global function definition for ‘pchisq’
iota.c : rirm: no visible global function definition for ‘coef’
iota.c: no visible global function definition for ‘integrate’
iota.c: no visible global function definition for ‘sd’
iota.u: no visible global function definition for ‘integrate’
iprobs : <anonymous>: no visible global function definition for
  ‘plogis’
logL.ltm : logL: no visible global function definition for ‘dbinom’
logL.ltm : logL: no visible global function definition for ‘plogis’
logL.ltm : logL : <anonymous>: no visible global function definition
  for ‘plogis’
rJeffreys : Jpinv.min: no visible global function definition for
  ‘integrate’
rJeffreys : Jpinv: no visible global function definition for ‘nlminb’
rJeffreys : Jpinv: no visible global function definition for ‘qnorm’
rJeffreys: no visible global function definition for ‘runif’
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Rd file 'Jeffreys.Rd':
  \usage lines wider than 90 characters:
     Jeffreys(ltm.obj = NULL, inf.mat = NULL, inf.func = NULL, return = "prior", spl.method = "natural", range.int = c(-Inf, Inf))

Rd file 'iota.Rd':
  \usage lines wider than 90 characters:
     iota(ltm.obj, logL.fun, fscore.obj = NULL, data = NULL, prior = NULL, theta0 = NULL, range.int = c(-Inf, Inf), range.theta = c(-10, 10) ... [TRUNCATED]

Rd file 'iota.c.Rd':
  \usage lines wider than 90 characters:
     iota.c(ltm.obj, M = NULL, prior = NULL, logL.fun = NULL, rirm = NULL, range.int = c(-Inf, Inf))

These lines will be truncated in the PDF manual.
Unexported object imported by a ':::' call: ‘ltm:::crf.GPCM’
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for ‘integrate’
Jeffreys: no visible global function definition for ‘splinefun’
count.rows: no visible global function definition for ‘tail’
count.rows: no visible global function definition for ‘head’
cprobs : <anonymous>: no visible global function definition for
  ‘plogis’
inf.func.ltm : f: no visible global function definition for ‘plogis’
iota: no visible global function definition for ‘integrate’
iota: no visible global function definition for ‘optimize’
iota: no visible global function definition for ‘pchisq’
iota.c : rirm: no visible global function definition for ‘coef’
iota.c: no visible global function definition for ‘integrate’
iota.c: no visible global function definition for ‘sd’
iota.u: no visible global function definition for ‘integrate’
iprobs : <anonymous>: no visible global function definition for
  ‘plogis’
logL.ltm : logL: no visible global function definition for ‘dbinom’
logL.ltm : logL: no visible global function definition for ‘plogis’
logL.ltm : logL : <anonymous>: no visible global function definition
  for ‘plogis’
rJeffreys : Jpinv.min: no visible global function definition for
  ‘integrate’
rJeffreys : Jpinv: no visible global function definition for ‘nlminb’
rJeffreys : Jpinv: no visible global function definition for ‘qnorm’
rJeffreys: no visible global function definition for ‘runif’
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Unexported object imported by a ':::' call: ‘ltm:::crf.GPCM’
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for ‘integrate’
Jeffreys: no visible global function definition for ‘splinefun’
count.rows: no visible global function definition for ‘tail’
count.rows: no visible global function definition for ‘head’
cprobs : <anonymous>: no visible global function definition for
  ‘plogis’
inf.func.ltm : f: no visible global function definition for ‘plogis’
iota: no visible global function definition for ‘integrate’
iota: no visible global function definition for ‘optimize’
iota: no visible global function definition for ‘pchisq’
iota.c : rirm: no visible global function definition for ‘coef’
iota.c: no visible global function definition for ‘integrate’
iota.c: no visible global function definition for ‘sd’
iota.u: no visible global function definition for ‘integrate’
iprobs : <anonymous>: no visible global function definition for
  ‘plogis’
logL.ltm : logL: no visible global function definition for ‘dbinom’
logL.ltm : logL: no visible global function definition for ‘plogis’
logL.ltm : logL : <anonymous>: no visible global function definition
  for ‘plogis’
rJeffreys : Jpinv.min: no visible global function definition for
  ‘integrate’
rJeffreys : Jpinv: no visible global function definition for ‘nlminb’
rJeffreys : Jpinv: no visible global function definition for ‘qnorm’
rJeffreys: no visible global function definition for ‘runif’
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Unexported object imported by a ':::' call: 'ltm:::crf.GPCM'
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for 'integrate'
Jeffreys: no visible global function definition for 'splinefun'
count.rows: no visible global function definition for 'tail'
count.rows: no visible global function definition for 'head'
cprobs : <anonymous>: no visible global function definition for
  'plogis'
inf.func.ltm : f: no visible global function definition for 'plogis'
iota: no visible global function definition for 'integrate'
iota: no visible global function definition for 'optimize'
iota: no visible global function definition for 'pchisq'
iota.c : rirm: no visible global function definition for 'coef'
iota.c: no visible global function definition for 'integrate'
iota.c: no visible global function definition for 'sd'
iota.u: no visible global function definition for 'integrate'
iprobs : <anonymous>: no visible global function definition for
  'plogis'
logL.ltm : logL: no visible global function definition for 'dbinom'
logL.ltm : logL: no visible global function definition for 'plogis'
logL.ltm : logL : <anonymous>: no visible global function definition
  for 'plogis'
rJeffreys : Jpinv.min: no visible global function definition for
  'integrate'
rJeffreys : Jpinv: no visible global function definition for 'nlminb'
rJeffreys : Jpinv: no visible global function definition for 'qnorm'
rJeffreys: no visible global function definition for 'runif'
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Unexported object imported by a ':::' call: ‘ltm:::crf.GPCM’
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for ‘integrate’
Jeffreys: no visible global function definition for ‘splinefun’
count.rows: no visible global function definition for ‘tail’
count.rows: no visible global function definition for ‘head’
cprobs : <anonymous>: no visible global function definition for
  ‘plogis’
inf.func.ltm : f: no visible global function definition for ‘plogis’
iota: no visible global function definition for ‘integrate’
iota: no visible global function definition for ‘optimize’
iota: no visible global function definition for ‘pchisq’
iota.c : rirm: no visible global function definition for ‘coef’
iota.c: no visible global function definition for ‘integrate’
iota.c: no visible global function definition for ‘sd’
iota.u: no visible global function definition for ‘integrate’
iprobs : <anonymous>: no visible global function definition for
  ‘plogis’
logL.ltm : logL: no visible global function definition for ‘dbinom’
logL.ltm : logL: no visible global function definition for ‘plogis’
logL.ltm : logL : <anonymous>: no visible global function definition
  for ‘plogis’
rJeffreys : Jpinv.min: no visible global function definition for
  ‘integrate’
rJeffreys : Jpinv: no visible global function definition for ‘nlminb’
rJeffreys : Jpinv: no visible global function definition for ‘qnorm’
rJeffreys: no visible global function definition for ‘runif’
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Unexported object imported by a ':::' call: ‘ltm:::crf.GPCM’
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for ‘integrate’
Jeffreys: no visible global function definition for ‘splinefun’
count.rows: no visible global function definition for ‘tail’
count.rows: no visible global function definition for ‘head’
cprobs : <anonymous>: no visible global function definition for
  ‘plogis’
inf.func.ltm : f: no visible global function definition for ‘plogis’
iota: no visible global function definition for ‘integrate’
iota: no visible global function definition for ‘optimize’
iota: no visible global function definition for ‘pchisq’
iota.c : rirm: no visible global function definition for ‘coef’
iota.c: no visible global function definition for ‘integrate’
iota.c: no visible global function definition for ‘sd’
iota.u: no visible global function definition for ‘integrate’
iprobs : <anonymous>: no visible global function definition for
  ‘plogis’
logL.ltm : logL: no visible global function definition for ‘dbinom’
logL.ltm : logL: no visible global function definition for ‘plogis’
logL.ltm : logL : <anonymous>: no visible global function definition
  for ‘plogis’
rJeffreys : Jpinv.min: no visible global function definition for
  ‘integrate’
rJeffreys : Jpinv: no visible global function definition for ‘nlminb’
rJeffreys : Jpinv: no visible global function definition for ‘qnorm’
rJeffreys: no visible global function definition for ‘runif’
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.
Unexported object imported by a ':::' call: 'ltm:::crf.GPCM'
  See the note in ?`:::` about the use of this operator.
Jeffreys: no visible global function definition for 'integrate'
Jeffreys: no visible global function definition for 'splinefun'
count.rows: no visible global function definition for 'tail'
count.rows: no visible global function definition for 'head'
cprobs : <anonymous>: no visible global function definition for
  'plogis'
inf.func.ltm : f: no visible global function definition for 'plogis'
iota: no visible global function definition for 'integrate'
iota: no visible global function definition for 'optimize'
iota: no visible global function definition for 'pchisq'
iota.c : rirm: no visible global function definition for 'coef'
iota.c: no visible global function definition for 'integrate'
iota.c: no visible global function definition for 'sd'
iota.u: no visible global function definition for 'integrate'
iprobs : <anonymous>: no visible global function definition for
  'plogis'
logL.ltm : logL: no visible global function definition for 'dbinom'
logL.ltm : logL: no visible global function definition for 'plogis'
logL.ltm : logL : <anonymous>: no visible global function definition
  for 'plogis'
rJeffreys : Jpinv.min: no visible global function definition for
  'integrate'
rJeffreys : Jpinv: no visible global function definition for 'nlminb'
rJeffreys : Jpinv: no visible global function definition for 'qnorm'
rJeffreys: no visible global function definition for 'runif'
Undefined global functions or variables:
  coef dbinom head integrate nlminb optimize pchisq plogis qnorm runif
  sd splinefun tail
Consider adding
  importFrom("stats", "coef", "dbinom", "integrate", "nlminb",
             "optimize", "pchisq", "plogis", "qnorm", "runif", "sd",
             "splinefun")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.