By careful programming practices you should be able to avoid the
problem. There is no way to prevent it since the program is only
doing what you ask it to do and if you make a mistake and ask it do to
something, it is not the program's fault. One of the nice things (&
bad things) about R is that
Dear list users,
if within a function I first define a matrix
mymat <- matrix(NA, nrow=m, ncol=n)
and somewhere afterwards by mistake
mymat <- c(1,2,3)
this second command deletes the first one.
How can I make sure that within the function mymat will always remain the
matrix defined at the beginni
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