Use mapply instead

On Fri, Nov 16, 2012 at 5:01 PM, billycorg <

[hidden email]> wrote:

> Hi R Users.

>

> I have a simple question on a loop.

>

> The following loop works fine:

>

> r_t=list()

> for(i in 1:500)

> {

> r_t[[i]]=h_t_half[[i]]%*%matrix(*z_t_m*[i,])

> }

>

> But indeed I need also that *z_t_m* varies. Let us suppose that *z_t_m* has

> 1000 replicates,

> I have written the following loop that (naturally) does not work.

>

> r_t <- list()

> for(r in 1:replicate)

> {

> for(i in 1:499)

> {

> r_t[[r]][[i]]=h_t_half[[i]]%*%matrix(*z_t_m*[[r]][i,])

> }

> }

>

> If, for instance, I try to do

>

> h_t_half[[1]]%*%matrix(*z_t_m*[[1000]][1,])

>

> I effectively obtain (only one row of) r_t. But I need to have 1000

> replications of the whole r_t, that has 500 rows.

>

> Do you have any suggestions?

>

> Thank you!!!

>

>

>

> --

> View this message in context:

http://r.789695.n4.nabble.com/simple-question-on-loop-tp4649761.html> Sent from the R help mailing list archive at Nabble.com.

>

> ______________________________________________

>

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>

https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide

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--

Mehmet SÃ¼zen, Ph.D. ( Dr.phil.nat. )

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https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide

http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.