adding data from one cell array to a matrix

Question

Joseph Lee 2017-11-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/370013-adding-data-from-one-cell-array-to-a-matrix

编辑： Joseph Lee 2017-11-30

M is a 2x4matrix
H is a 3x4cell array

How do i add the 1st row of H to every row of M?

M = [
    1       2        3          4
    5       6        7          8
     ];
  H = {[15 35] [10 20] [30 40 10] [15]
      [30 20 15] [45 55] [50 70]  [30 70]
       [25] [10 20 30]  [25 35]  [60 70]};
      fun = @(m,h) [fliplr(h)+m,m,m+h];
    ans=cellfun(fun,num2cell(M), *H{1,:}*,'Uni',0); < what do i put H as?
ans={[36 16  1 16 36] [20 12 2 12 22] [13 43 33 3 33 43 13] [19 4 19]
     [40 20  5 20 40] [26 16  6 16 26] [17 47 37 7 37 47 17] [23 8 23]}

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Stephen23 2017-11-29

Do not use ans as the names of any variable. It is a special variable that can be overwritten by MATLAB.

Joseph Lee 2017-11-29

It is ok, its not being used in the code itself, its in here just to predict the results in theory

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Answer 1

Stephen23 2017-11-29

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/370013-adding-data-from-one-cell-array-to-a-matrix#answer_293788

编辑：Stephen23 2017-11-29

在 MATLAB Online 中打开

If M has two rows then

H([1,1],:)

In general

H(ones(1,size(M,1)),:)

or

repmat(H(1,:),size(M,1),1)

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Stephen23 2017-11-29

在 MATLAB Online 中打开

Demonstration:

M = [1,2,3,4;5,6,7,8];
H = {[15,35],[10,20],[30,40,10],[15];[30,20,15],[45,55],[50,70],[30,70];[25],[10,20,30],[25,35],[60,70]};
fun = @(m,h) [fliplr(h)+m,m,m+h];
tmp = H(ones(1,size(M,1)),:);
C = cellfun(fun,num2cell(M),tmp, 'Uni',0);

Giving:

>> C{:}
ans =
   36   16    1   16   36
ans =
   40   20    5   20   40
ans =
   22   12    2   12   22
ans =
   26   16    6   16   26
ans =
   13   43   33    3   33   43   13
ans =
   17   47   37    7   37   47   17
ans =
   19    4   19
ans =
   23    8   23
>>

Joseph Lee 2017-11-29

编辑：Joseph Lee 2017-11-30

在 MATLAB Online 中打开

wow thanks again, you predicted what i was going to ask, since my M is meant to be a much larger sized matrix

   eg M= 400x1300
       H= 10x1300
row=1;
while row<=10
  fun = @(m,h) [fliplr(h)+m,m,m+h];
     tmp = H(ones(1,size(M,1)),:); <i changed this to do it for increasing rows of H 
     C{row}= cellfun(fun,num2cell(M),tmp, 'Uni',0);
        row=row+1;
end