Combining 2 matrix of different row numbers but same column numbers.

A = [1 0 0 0 1 0 0 0; 0 1 0 0 0 1 0 0; 0 0 1 0 0 0 1 0; 0 0 0 1 0 0 0 1]
B = [1 1 0 0 0 0 0 0 -2 0 0; 0 1 1 0 0 0 0 0 0 -2 0; 0 0 1 1 0 0 0 0 0 0 -2]

ATotal = [A zeros(4,3)]
Afinal = [ATotal B]

I am having this error. Error using horzcat Dimensions of matrices being concatenated are not consistent.

Error in july6 (line 5) Afinal=[ATotal B]

Appreciate your kind assistance.

[Jan]

I've formatted your code to make it readable. Please use the "{} Code" button by your own in the future.

Answer 1

[Jan]

How coud we help you? You try to concatenate a [4 x 11] and a [3 x 11] matrix horizontally. But the horizontal concatenation requires the same number of rows.

Perhaps you mean the vertical concatenation:

Afinal = [ATotal; B]

But I cannot guess the intention of the code based on the failing code only.

[Gratitude Kim]

yaya. I know my mistake. I forgot to place a ; thanks anyway.

Answer 2

[KL]

Dimensions of ATotal and B are not consistent, look at the number of rows.

Afinal=[ATotal [B; zeros(1,size(B,2))]]