making two matrices of genes the same size and same variable

hi,

happy new year

i have two adjacency matrices like below

> mat <- read.table("aracne.txt", header = T, sep = "\t", row.names=1)
> head(mat[,1:4])
          AT1G01060 AT1G01170 AT1G01180 AT1G01260
AT1G01060         0         0         0         0
AT1G01170         0         0         0         0
AT1G01180         0         0         0         0
AT1G01260         0         0         0         0
AT1G01380         0         0         0         0
AT1G01490         0         0         0         0
> # watching the dimension of matrix
> dim(mat)
[1] 3123 3123

> Newmat <- read.table("newMat.txt", header = T, sep = "\t", row.names=1)
> head(Newmat[,1:4])
          AT1G01060 AT1G01170 AT1G01180 AT1G01183
AT1G01060         0         0         0         0
AT1G01170         0         0         0         0
AT1G01180         0         0         0         0
AT1G01183         0         0         0         0
AT1G01260         0         0         0         0
AT1G01380         0         0         0         0
> # watching the dimension of matrix
> dim(Newmat)
[1] 3515 3515

how i can extract one matrix from another please, i mean i need two matrices with the same size, maybe

3123 3123 thank you for your help

[Guillaume]

Your example does not appear to be using matlab syntax. Is your question actually about matlab?