[R] compute values by condition in DF by rownames

[Karim Mezhoud]

Thanks JS
I think aggregate function is better.
Karim
Le 17 févr. 2015 08:33, "JS Huang" <js.huang at protective.com> a écrit :

> Hi,
>
>   I hope that someone can provide a better way to implement it.  This is my
> implementation.
>
> > data
>               X2     gbm_tcga   lusc_tcga ucec_tcga_pub
> 1       gbm_tcga  1.000000000  0.14053719  -0.102847164
> 2       gbm_tcga  1.000000000  0.04413434   0.013568055
> 3       gbm_tcga  1.000000000 -0.20003971   0.038971817
> 4       gbm_tcga  1.000000000  0.14569916   0.009947045
> 5      lusc_tcga  0.140537191  1.00000000   0.133080708
> 6      lusc_tcga  0.044134345  1.00000000   0.062024713
> 7      lusc_tcga -0.200039712  1.00000000  -0.130239551
> 8      lusc_tcga  0.145699156  1.00000000   0.041796670
> 9  ucec_tcga_pub -0.102847164  0.13308071   1.000000000
> 10 ucec_tcga_pub  0.013568055  0.06202471   1.000000000
> 11 ucec_tcga_pub  0.038971817 -0.13023955   1.000000000
> 12 ucec_tcga_pub  0.009947045  0.04179667   1.000000000
> > test
> function(x)
> {
>   tempMatrix <- matrix(0,nrow=3,ncol=3)
>   lev <- levels(x$X2)
>   for (i in 1:length(lev))
>   {
>     tempMatrix[i,1] = sum(ifelse(abs(x[x$X2==lev[i],2])>0.2,1,0))
>     tempMatrix[i,2] = sum(ifelse(abs(x[x$X2==lev[i],3])>0.2,1,0))
>     tempMatrix[i,3] = sum(ifelse(abs(x[x$X2==lev[i],4])>0.2,1,0))
>   }
>   result <- data.frame(lev,tempMatrix)
>   names(result) <- c("X2","gbm_tcga","lusc_tcga","tcga_pub")
>   return(result)
> }
> > test(data)
>              X2 gbm_tcga lusc_tcga tcga_pub
> 1      gbm_tcga        4         1        0
> 2     lusc_tcga        1         4        0
> 3 ucec_tcga_pub        0         0        4
> >
>
>
>
> --
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> Sent from the R help mailing list archive at Nabble.com.
>
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