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

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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