
I have a question related to matrix().

The code below randomly generates 3 Poisson numbers into a 3 by 1 matrix:

> matrix1 <- matrix(rpois(3,lambda=2),nrow=3,ncol=1)

And I use list() to see what they are:

     [,1]

[1,]  3

[2,]  1

[3,]  4

, which is what I had intended.

I then I want to randomly generate y Normal numbers into a 3 by 8 matrix. y in this case would be 3, 1, and 4; so the resulting matrix should be such that the first row has three different Normal numbers; the second row has 1 Normal number; and the third row has four different Normal numbers. I have the following code to do that:

> matrix2 <- matrix(rnorm(poisNums),nrow=3,ncol=8)

To my surprise, matrix2 does not look anything like what I had intended. Instead, it repeats the values in the first column (of the matrix2) eight times. What part of the code do I need to fix?


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