Multiplying matrices by a number

Hi all,

I have a matrix in matlab that I already divide in 52 matrices, now I want to multiply each one of this matrices by the same number.

Each one of the 52 matrices have the size 7*24.

So the code I used to read and divide the matrix is;

 [num, preco] = xlsread('preco_2008', 'Folha1' , 'C3:Z368'); 

 [M,N] = size(preco);  %# Matrix size
 nSub = 52;          %# Number of submatrices
 semana = mat2cell(preco,diff(round(linspace(0,M,nSub+1))),N);

Now I want to multiply "semana" by Txsemanal

IPC_2008=-0.5; 
IPC_2013=-0.2;

Txmensal=(IPC_2013-IPC_2008)/(IPC_2008);

Txsemanal=Txmensal/4;

I already tried A = mtimes(semana,Txsemanal) and cellfun(@mtimes, semana, Txsemanal, 'UniformOutput', false)

But I getting and error.

Could you please help me with multiplication?

Answer 1

[Image Analyst]

preco is the text (strings) in your workbook. So you can't multiply words by numbers . Perhaps you meant to use num instead , which is an array of numerical types, most likely doubles.

[João]

Thx for the help, I already found my problem I was using dots in excel so I was getting numbers as text.

Answer 2

[ES]

 [num, preco] contains cell array. mtimes does no support cell array inputs. so convert  them to matrices using cell2mat - http://www.mathworks.in/help/matlab/ref/cell2mat.html