Set some values to zero regarding to anothers

Question

sbei arafet 2016-7-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/294561-set-some-values-to-zero-regarding-to-anothers

回答： Image Analyst 2016-7-9

Hi, i want to set all values different from wx vector to zero

index=find(labels==0); 
wx=full(T(index,1));% vector containing values to not be setted to zero
elements=full(T(:,1));
indexmr=find(~ismember(elements,wx));% find index of elements in elements not equal to wx
elements(indexmr)=0;% set values to zero

the problem that there exists values that are not setted to zero and does'nt exist in wx

size(wx)
155 1
size(find(elements))
176 1

i have tried also

elements=zeros(size(T(:,1)));
for j=1: size(elements,1)
    for i=1: size(index,1)
        if (index(i)==j)
            elements(j)=T(index(i),1);
        end
      end
  end
  size(find(elements))
115 1

Thnaks in advance

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Answer 1

Image Analyst 2016-7-9

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/294561-set-some-values-to-zero-regarding-to-anothers#answer_228191

在 MATLAB Online 中打开

Please give some data with desired output. It's not clear what you want.

For example to "set all values different from wx vector to zero" you could do

% Find indexes where labels is different from wx.
indexesThatDontMatch = labels ~= wx;
% Now set to zero.
labels(indexesThatDontMatch) = 0;

Or maybe it's possible you want the setdiff(): "C = setdiff(A,B) returns the data in A that is not in B." I'm not sure until you clarify some more by showing input and output data.