On Feb 6, 2012, at 2:22 PM, Abhishek Pratap wrote:
Hey Guys
I want to divide(numerically) all the columns of a data frame by
different numbers. Here is what I am doing but getting a weird error.
The values in each column are not getting divided by the corresponding
value in the denominator vector instead by the alternative values. I
am sure I am messing up something.
Appreciate your help
-Abhi
head(counts)
WT_CON WT_RB MU_CON MU_RB
row1 839 180 477 187
head(counts/c(2,3,4,5))
WT_CON WT_RB MU_CON MU_RB
row1 419.50000 45.0000 238.5000 46.7500
The argument recycling is going to be done on a column basis. You
apaear to expect it to be done on a row basis. For that you need apply
Probably:
t( apply(counts, 1, "/", c(2,3,4,5)) )
But untested in absence of example.
---
David Winsemius, MD
West Hartford, CT
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