Perform operations on a cell variable

Question

Anton Sørensen 2020-4-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517525-perform-operations-on-a-cell-variable

评论： Anton Sørensen 2020-4-13

采纳的回答： Mehmed Saad

在 MATLAB Online 中打开

Hi all,

I want to perform operations on a cell variable containing different matrices.

I have a cell variable that have 14 different matrices with different length, ie. 2*130, 2*157, etc.

For each cell, I have to perform the following operation.

c = {P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14}; % Each P is a different matrix but they are all 2*x long (ie. 130 or 157) 
for i = 1:14
WW = sum(c{i},1)>=median(c{i}),1); & sum(c{i},2) >=median(c{i},2); % Condition, my WW variabel should be 1*14 in size, containing the sum of amount of columns that satisfy the condition
end

I know this is dead wrong, but I just want to give you guys an indication of what I want.

Basically, I need my WW to contain the amount of columns that satisfy the condition mentioned in the code. So WW will be the total amount of rows that satisfy the condition.

I want to find the amount of columns that are larger than the median in both row 1 and 2.

Do anyone have a good solution for this?

Kind regards

Anton

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Answer 1

Mehmed Saad 2020-4-13

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517525-perform-operations-on-a-cell-variable#answer_425725

Read this

https://www.mathworks.com/help/matlab/ref/cellfun.html

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Anton Sørensen 2020-4-13

编辑：Anton Sørensen 2020-4-13

在 MATLAB Online 中打开

Hi again Muhammad,

Do you have an idea on how to fix the following:

c = {P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14};
med_1 = cellfun(@median,cellfun(@(x) x(1,:),c,'UniformOutput',false),'UniformOutput',false);
med_2 = cellfun(@median,cellfun(@(x) x(2,:),c,'UniformOutput',false),'UniformOutput',false);
WW =sum(cellfun(@(x) x(1,:),c,'UniformOutput',false)>=med_1) & sum(cellfun(@(x) x(2,:),c,'UniformOutput',false)>=med_2) ;