Help with multiplication of cell arrays

Hi,
I have an array of 100 1*4 matrices
I have a second array of 1000 1*4 matrices
I want the .* of for each of my 100 matrices multiplied by each of the 1000 matrices.
In total, my ouput should be 100,000 matrics.
I just wanted some help with the code, I think i may be misunderstanding how the arrays are working...
Thanks

 采纳的回答

Hi,
If I understood what you said correctly your problem could be solved like this
A = cell array containing 1000 1*4 matrices B = cell array containing 100 1*4 matrices
C = cell(length(A),length(B));
for i = 1:1000
for j = 100
C{i,j} = A{i}.*B{j};
end
end
the for loop could be vectorized to:
for j = 100
C{:,j} = A{:}.*B{j};
end
This will give you an output cell matrix of the size 1000*100
Hope this was of help.

2 个评论

Thanks, perfect.
this shows an error of... Undefined function 'times' for input arguments of type 'cell' . . plz help me for element by element multiplication ,subtraction ,addition,power,,,,

请先登录,再进行评论。

更多回答(1 个)

If you have the Neural Networks Toolbox:
And specifically
Cm = gmultiply(A',B);

1 个评论

if i use this logic in my program.i got error like "Sparse integer array arithmetic operation in not supported" please help help

请先登录,再进行评论。

类别

帮助中心File Exchange 中查找有关 Matrix Indexing 的更多信息

Community Treasure Hunt

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

Start Hunting!

Translated by