Error in re-building vignettes:
  ...
Creating a generic function for 'crossprod' from package 'base' in package 'Matrix'
Creating a generic function for 'tcrossprod' from package 'base' in package 'Matrix'
Creating a generic function for 'which' from package 'base' in package 'Matrix'
in method for 'coerce' with signature '"graphAM","sparseMatrix"': no definition for class "graphAM"
in method for 'coerce' with signature '"graph","CsparseMatrix"': no definition for class "graph"
in method for 'coerce' with signature '"graph","Matrix"': no definition for class "graph"
in method for 'coerce' with signature '"graphNEL","CsparseMatrix"': no definition for class "graphNEL"
in method for 'coerce' with signature '"graphNEL","TsparseMatrix"': no definition for class "graphNEL"
in method for 'coerce' with signature '"sparseMatrix","graph"': no definition for class "graph"
in method for 'coerce' with signature '"sparseMatrix","graphNEL"': no definition for class "graphNEL"
in method for 'coerce' with signature '"TsparseMatrix","graphNEL"': no definition for class "graphNEL"
Creating a generic function for 'qr.R' from package 'base' in package 'Matrix'
Creating a generic function for 'qr.Q' from package 'base' in package 'Matrix'
Creating a generic function for 'qr.qy' from package 'base' in package 'Matrix'
Creating a generic function for 'qr.qty' from package 'base' in package 'Matrix'
Creating a generic function for 'qr.coef' from package 'base' in package 'Matrix'
Creating a generic function for 'qr.resid' from package 'base' in package 'Matrix'
Creating a generic function for 'qr.fitted' from package 'base' in package 'Matrix'
Creating a generic function for 'toeplitz' from package 'stats' in package 'Matrix'
Warning: No generic function 'summary' found corresponding to requested imported methods from package 'Matrix' when loading 'MatrixModels' (malformed exports?)

Error: processing vignette 'jss816.Rnw' failed with diagnostics:
 chunk 37 
Error in library(rgdal) : there is no package called 'rgdal'
Execution halted