CODEWITHSUNDEEP
matrixstatisticsrbindcbind
LoveMYMAth
LoveMYMAth

Reputation: 111

Forming a matrix that allows columns but not rows [R]

I am trying to create a matrix like so:

x1 <- rbern(1000,.5)
x2 <- (1-x1)
head(x2)
head(x1)

M <- cbind(x1,x2)
M

When I input M, it shows me x1 and x2 as the columns with 1000 rows. I presume this is the matrix. The issue is when I find the transpose

A<- t(M)
A
tail(A)

It is like x2 disappears, and when I try to multiply A*M, I get the error that these are non comformable arrays.

I have tried this

M <- rbind(x1,x2)
M
tail(M)

Still, it is like x2 does not exist. What am I missing here?

Upvotes: 0

Views: 19

Answers (1)

Vin&#237;cius F&#233;lix
Vin&#237;cius F&#233;lix

Reputation: 8811

dim() allows to see the dimensions, where the first number is the number of rows and the second the numbers of columns, see that in M we have 2 columns, x1 and x2, since you used cbind()

> dim(M)
[1] 1000    2

> dim(A)
[1]    2 1000

After transposin M to A see that you have 2 rows, so x2 still there, but as the second row.

Upvotes: 0

Related Questions