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rloopsfor-loop
Namcaz
Namcaz

Reputation: 1

R Trying to use for() to fill a matrix

Trouble in R

I'm having trouble filling a matrix with values using a for() loop. I'm starting with making a blank matrix 1-100

z <- matrix(NA, ncol=100, nrow=100)
q <- 1:100

I need to fill each nrows with 1-100 so that the original matrix becomes the sequence 1-100 in every row

i tried

for(n in 1:nrows(z)){
    print(q)
}

but it didn't work as expected.

Upvotes: 0

Views: 2995

Answers (1)

G5W
G5W

Reputation: 37641

print just prints to the screen without changing your matrix in any way. It would be better to do this without any loop at all. 

z <- matrix(rep(1:100, each=100), ncol=100, nrow=100)

If you must use a loop, 

for(n in 1:nrow(z)){
    z[n,] = q
}

Note that it is nrow not nrows

Upvotes: 1

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