agg: no visible binding for global variable ‘sd’
agg : <anonymous>: no visible global function definition for ‘quantile’
bayesianDynamicFilter: no visible global function definition for
  ‘rnorm’
bayesianDynamicFilter: no visible global function definition for
  ‘rgamma’
bayesianDynamicFilter: no visible global function definition for
  ‘pnorm’
bayesianDynamicFilter: no visible global function definition for
  ‘dnorm’
bayesianDynamicFilter: no visible binding for global variable ‘median’
bayesianDynamicFilter: no visible binding for global variable ‘sd’
buildPrior: no visible binding for global variable ‘runmed’
buildPrior: no visible global function definition for ‘tail’
buildPrior: no visible global function definition for ‘head’
calibration_ssm: no visible global function definition for ‘optim’
llCalibration: no visible global function definition for ‘as.ts’
llCalibration: no visible global function definition for ‘logLik’
locally_iid_EM: no visible global function definition for ‘optim’
mle_filter: no visible global function definition for ‘as.ts’
move_step: no visible global function definition for ‘pnorm’
move_step: no visible global function definition for ‘rnorm’
move_step: no visible global function definition for ‘dnorm’
move_step: no visible global function definition for ‘runif’
move_step: no visible global function definition for ‘rgamma’
move_step: no visible global function definition for ‘dgamma’
phi_init: no visible global function definition for ‘cov’
smoothed_EM: no visible global function definition for ‘optim’
tomogravity.fit: no visible global function definition for ‘optim’
twMCMC: no visible global function definition for ‘rnorm’
twMCMC: no visible global function definition for ‘rgamma’
twMCMC: no visible global function definition for ‘runif’
twMCMC: no visible global function definition for ‘tail’
Undefined global functions or variables:
  as.ts cov dgamma dnorm head logLik median optim pnorm quantile rgamma
  rnorm runif runmed sd tail
Consider adding
  importFrom("stats", "as.ts", "cov", "dgamma", "dnorm", "logLik",
             "median", "optim", "pnorm", "quantile", "rgamma", "rnorm",
             "runif", "runmed", "sd")
  importFrom("utils", "head", "tail")
to your NAMESPACE file.