On 06-02-2012, at 20:22, 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.
I don't think you are getting an error.
You are getting an unexpected result (you think).
> 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
I tried this
df <- data.frame(a=runif(10),b=runif(10),c=runif(10))
scal <- c(2,3,4)
> df
a b c
1 0.47661685 0.73457617 0.90045279
2 0.06916502 0.76374600 0.07630196
3 0.17029174 0.29450289 0.07416969
4 0.03126839 0.09864740 0.08230353
5 0.23713816 0.06342224 0.91241698
6 0.21970595 0.86890690 0.47316101
7 0.46380324 0.26142304 0.87823277
8 0.81256517 0.76097474 0.98956553
9 0.74425369 0.29228545 0.27496707
10 0.65425285 0.40166967 0.12231213
> df/scal
a b c
1 0.23830843 0.24485872 0.22511320
2 0.02305501 0.19093650 0.03815098
3 0.04257293 0.14725144 0.02472323
4 0.01563419 0.03288247 0.02057588
5 0.07904605 0.01585556 0.45620849
6 0.05492649 0.43445345 0.15772034
7 0.23190162 0.08714101 0.21955819
8 0.27085506 0.19024369 0.49478276
9 0.18606342 0.14614273 0.09165569
10 0.32712642 0.13388989 0.03057803
Checking:
> df[4,]/scal
a b c
4 0.01563419 0.03288247 0.02057588
This is what you want guessing from your description.
You haven't given us an example with desired output.
Berend
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