[R] ignoring zeros or converting to NA

[rcoder]

Hi everyone,

I have a matrix that has a combination of zeros and NAs. When I perform
certain calculations on the matrix, the zeros generate "Inf" values. Is
there a way to either convert the zeros in the matrix to NAs, or only
perform the calculations if not zero (i.e. like using something similar to
an !all(is.na() construct)?

Thanks,

rcoder
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