• using R version 3.5.0 Patched (2018-06-13 r74898)
• using platform: x86_64-pc-linux-gnu (64-bit)
• using session charset: UTF-8
• checking for file ‘mathgraph/DESCRIPTION’ ... OK
• this is package ‘mathgraph’ version ‘0.9-11’
• checking package namespace information ... OK
• checking package dependencies ... OK
• checking if this is a source package ... OK
• checking if there is a namespace ... OK
• checking for executable files ... OK
• checking for hidden files and directories ... OK
• checking for portable file names ... OK
• checking for sufficient/correct file permissions ... OK
• checking serialization versions ... OK
• checking whether package ‘mathgraph’ can be installed ... OK
• checking package directory ... OK
• checking DESCRIPTION meta-information ... NOTE
  Malformed Description field: should contain one or more complete sentences.
• checking top-level files ... OK
• checking for left-over files ... OK
• checking index information ... OK
• checking package subdirectories ... OK
• checking R files for non-ASCII characters ... OK
• checking R files for syntax errors ... OK
• checking whether the package can be loaded ... OK
• checking whether the package can be loaded with stated dependencies ... OK
• checking whether the package can be unloaded cleanly ... OK
• checking whether the namespace can be loaded with stated dependencies ... OK
• checking whether the namespace can be unloaded cleanly ... OK
• checking loading without being on the library search path ... OK
• checking use of S3 registration ... OK
• checking dependencies in R code ... OK
• checking S3 generic/method consistency ... NOTE
  Found the following apparent S3 methods exported but not registered:
    [.mathgraph [<-.mathgraph adjamat.mathgraph alldirected.default
    alldirected.mathgraph c.mathgraph getpath.adjamat getpath.default
    getpath.incidmat getpath.mathgraph incidmat.mathgraph
    length.mathgraph names.mathgraph names<-.mathgraph plot.mathgraph
    print.mathgraph unique.mathgraph
  See section ‘Registering S3 methods’ in the ‘Writing R Extensions’
  manual.
• checking replacement functions ... OK
• checking foreign function calls ... OK
• checking R code for possible problems ... [5s/8s] NOTE
  plot.mathgraph: no visible global function definition for ‘plot’
  plot.mathgraph: no visible global function definition for ‘box’
  plot.mathgraph: no visible global function definition for ‘segments’
  plot.mathgraph: no visible global function definition for ‘arrows’
  plot.mathgraph: no visible global function definition for ‘text’
  Undefined global functions or variables:
    arrows box plot segments text
  Consider adding
    importFrom("graphics", "arrows", "box", "plot", "segments", "text")
  to your NAMESPACE file.
  
  Found the following assignments to the global environment:
  File ‘mathgraph/R/mathgraph.R’:
    assign(Inames[i], this.val, pos = 1)
• checking Rd files ... OK
• checking Rd metadata ... OK
• checking Rd line widths ... OK
• checking Rd cross-references ... OK
• checking for missing documentation entries ... OK
• checking for code/documentation mismatches ... OK
• checking Rd \usage sections ... OK
• checking Rd contents ... OK
• checking for unstated dependencies in examples ... OK
• checking examples ... ERROR
  Running examples in ‘mathgraph-Ex.R’ failed
  The error most likely occurred in:
  
  > base::assign(".ptime", proc.time(), pos = "CheckExEnv")
  > ### Name: adjamat
  > ### Title: Adjacency Matrix of a Mathematical Graph
  > ### Aliases: adjamat adjamat.mathgraph is.adjamat
  > ### Keywords: math
  >
  > ### ** Examples
  >
  > adjamat(mathgraph(~ 1:3 * 3:5, dir=TRUE))
  Error in UseMethod("adjamat") :
    no applicable method for 'adjamat' applied to an object of class "mathgraph"
  Calls: adjamat
  Execution halted
• checking PDF version of manual ... OK
• DONE

Status: 1 ERROR, 3 NOTEs