CODEWITHSUNDEEP
rloopsmatrix-multiplicationmatrix-inverse
cherrykate
cherrykate

Reputation: 35

Multiply matrices with Loop in R

I have a matrix "eps" with 2 rows and n columns. I also have a matrix B with 2 rows and 2 columns. I want to multiply the inverse of B with each column of "eps" to acquire n new matrices dimension 2x1. Then I transpose those n new matrices for dimension 1x2 and fill them in matrix U which has 2 columns and n rows.

But my code below is wrong with the message "Error: unexpected symbol in "for i"" from R. Could you please help me? Thanks a lot!

for i in 1:nrow(U){U[i,] <- t(solve(B)%*%eps[,i])}

Upvotes: 1

Views: 882

Answers (1)

Zheyuan Li
Zheyuan Li

Reputation: 73265

U <- t(solve(B, eps)) and done!

Regarding the error: for (i in 1:nrow(U)) please read ?Control.

Upvotes: 2

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