Multiplying matrices by a number

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João
João 2013-12-22
评论： João 2013-12-24
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?

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采纳的回答

Image Analyst
Image Analyst 2013-12-23
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.
  1 个评论
João
João 2013-12-24
Thx for the help, I already found my problem I was using dots in excel so I was getting numbers as text.

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更多回答（1 个）

ES
ES 2013-12-23
编辑：ES 2013-12-23
[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

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