In an earlier post, a person wanted to divide each of the rows of
rawdata by the row vector sens so he did below but didn't like it and
asked if there was a better solution.
rawdata <- data.frame(rbind(c(1,2,2), c(4,5,6))) sens <- c(2,4,6)
temp <- t(rawdata)/sens
temp <- t(temp)
print(temp)
Gabor sent three other solutions and I understood 2 of them but not the one
below.
I think I understand mapply a little but what I don't understand how
it knows to take the rows of rawdata and then I guess recycle sens ?
how did the mapply know not to take the columns of rawdata and do
something to them ? or maybe mapply does things element by element and it is
doing more
complex recycling ? I guess I don't really understand mapply that well but I
did
read the help of it.
Thanks so much for any enlightenment from anyone besides Gabor. I bother him
enough already
and he does more than enough.
tempc <- data.frame(mapply("/", rawdata, sens))
print(tempc)
Mark
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