fnAppend function

paste something before file name extension.

Append a file name like file.mod to file_1.mod or file_pk.mod. If it's a number, we can pad some zeros if wanted. The separator (default is underscore) can be modified.

fnAppend(fn, x, pad0 = 0, sep = "_", allow.noext = FALSE)

Arguments

• fn: The file name or file names to modify.
• x: A character string or a numeric to add to the file name
• pad0: In case x is numeric, a number of zeros to pad before the appended number. This is useful if you are generating say more than 10 files, and your counter will be 01, 02,.., 10,... and not 1, 2,...,10,...
• sep: The separator between the existing file name (until extension) and the addition.
• allow.noext: Allow fn to be string(s) without extensions? Default is FALSE in which case an error will be thrown if fn contains strings without extensions. If TRUE, x will be appended to fn in these cases.

Returns

A character (vector)

Examples

fnAppend("plot.png",1)
fnAppend("plot.png",1,pad0=2,sep="-")
fnAppend("plot.png","one")
fnAppend("plot","one",allow.noext=TRUE)