How to multiply only some column and rows for a given number?!

1 次查看（过去 30 天）

Myke Ziz 2020-1-2

关闭： MATLAB Answer Bot 2021-8-20

I want to multiply for 2.5 the all the rows (2 in total) but not the 1 column, how should I do?

Like this I litterally get rid of the column 1 after multiplying for 2.5.

scores = score(1:2,2:21).*(2.5)

Thank you for you help

Best

Fabio Freschi 2020-1-2

You are close to the answer, but you need to keep the first column

% your matrix with data
A = rand(2,21);
% multiply all but the first column
B = [A(:,1) A(:,2:end)*2.5];

Myke Ziz 2020-1-2

Thank you a lot Fabio for your great answer it is clear now!!

Best regards

Z.M.

Fabio Freschi 2020-1-2

My pleasure! Please accept the answer if it solves your original problem

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by