Change function names to use underscores. This will be a major change and should have the version number incremented appropriately. This is in response to this warning:
> checking S3 generic/method consistency ... WARNING
sum:
function(..., na.rm)
sum.resp.mats:
function(mat.list, items)
See section 'Generic functions and methods' in the 'Writing R
Extensions' manual.
Some options are:
There are more things to update, especially internal functions and variable names.
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