MATLAB: Generate a dumthe with a cell

dummy cell

I want to generate a dummy for my dataset. I have a (48×1 cell called category)

dummy=[];
for i=1:1:48
    if isequal(category(i), 'Beef & Pork')
        dummy(i)=1
    else
        dummy(i)=0
    end
end

Best Answer

dummy = strcmp(category, 'beef & Pork')

Related Solutions

MATLAB: I have ‘value’ as a cell array (Size 160*1) contians S101,S100,S103, S102 randomly.I need to look for S100 followed by S102 in this cell array such that if t1 == ‘S100’ && t2 == ‘S102’. How to do that

Bubblesjinx - if t1 and t2 are character arrays, then your condition would be

 if strcmp(t1, 'S100') && strcmp(t2, 'S102')
     % do something
 end

Use brackets instead of the braces {}.

To ensure that t1 and t2 are character arrays and not cells, then do

 t1 = value{j};
 t2 = value{j+1};

Note that how we index into cell arrays (using brackets or braces) determines the type of the retrieved element. Using brackets will give us a cell; using braces will give us the "native" data type of the object in that cell.

MATLAB: Interaction dummies

Here is a specific example of how to do it. If you need to generalize it and can't figure that out, let me know. The idea is to multiply the first column of d1 by each column of d2, then the second column of d1 by each column of d2:

d1 = dummyvar(T); d2 = dummyvar(R);
d1(:,[1 1 1 2 2 2]).*d2(:,[1 2 3 1 2 3])

Another thing to consider is the x2fx function, using something like this:

x2fx([T R],'interaction',1:2)

This requests that both T and R be treated as categorical, and that all columns for an interaction model be computed. You'll see the result has a column of ones, then dummy columns for T and R separately, then columns for the interaction. The idea is that these will be used in regression, so certain columns are omitted so that the full matrix is not overdetermined.

Best Answer

Related Solutions

MATLAB: I have ‘value’ as a cell array (Size 160*1) contians S101,S100,S103, S102 randomly.I need to look for S100 followed by S102 in this cell array such that if t1 == ‘S100’ && t2 == ‘S102’. How to do that

MATLAB: Interaction dummies

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