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### Running command:
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###   /Library/Frameworks/R.framework/Resources/bin/R CMD build --keep-empty-dirs --no-resave-data schex
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* checking for file ‘schex/DESCRIPTION’ ... OK
* preparing ‘schex’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘Seurat_to_SCE.Rmd’ using rmarkdown
2024-04-17 02:04:08.216 R[89008:450422340] XType: Using static font registry.
--- finished re-building ‘Seurat_to_SCE.Rmd’

--- re-building ‘using_schex.Rmd’ using rmarkdown

Quitting from lines 133-139 [dim-red] (using_schex.Rmd)
Error: processing vignette 'using_schex.Rmd' failed with diagnostics:
function 'as_cholmod_sparse' not provided by package 'Matrix'
--- failed re-building ‘using_schex.Rmd’

SUMMARY: processing the following file failed:
  ‘using_schex.Rmd’

Error: Vignette re-building failed.
Execution halted