[R] replacing text

[nj7w@virginia.edu]

Hello,

I have a vector:
vect <- c("a.bcd.ef", "gh.i", ...of length n)

Position and number of dots vary, and not follow specific pattern.
I wish to replace all the dots by "_" in vect,  so that it
looks like
"a_bcd_ef","gh_i", etc..

I tried with grep and regexpr, but couldn't get the desired result.

Thanks.
-Nitin



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