[R] Problem in loop

[Petr PIKAL]

Hi
> 
> Dear R users
> I want change the entries in a matrix. I did a matrix
> 
> 
> 
> A=0  1  5
> 
>   .3 0  0
> 
>   0  .5 0
> 
> 
> 
> A1<-A
> 
> 
> A2<-A*0.90
> A2
> 
>      1    2   3
> 
> 1 0.00 0.90 4.5
> 
> 2 0.27 0.00 0.0
> 
> 3 0.00 0.45 0.0
> 
> 
> 
> I need replace elements one by one in a loop
> 
> I tried the following using package POPBIO,
> 
> total <-matrix(0, nrow=5, ncol=60)
> 
> for(i in 1:10){
> 
> A1<-A
^^^^^^^^^^^
here you change A1 in each loop to A, is it what you want?

Regards
Petr

> 
> A1[1,2] <- A2[1,2]
> 
> A1[1,3]<-A2[1,3]
> 
> A1[2,1]<-A2[2,1]
> 
> A1[3,2]<-A2[3,2]
> 
> n <-runif(3)
> 
> n <- n/sum(n)
> 
> p1<-pop.projection(A1,n,60)
> 
> total[i,] <- p1$pop.sizes}
> 
> matplot2(total, legend=NA,xlab=c(years))
> 
> 
> 
> but i not view change in population
> 
> 
> 
> 
> 
> Thanks in advance
> 
> Fidel M.
> 
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> 
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