Converting a coloumn of characters into number for logistic regression

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Ron Herman 2020-5-1

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评论： Stephen23 2020-5-1

I have a coloumn that has Pass or Fail.

I want to assign Pass as 1 and Fail as zero for enntire coloumn.

a=['pass';'fail'; 'pass';'fail';'fail';'pass']
a =
  6×4 char array
    'pass'
    'fail'
    'pass'
    'fail'
    'fail'
    'pass'
    
    %Desired output
 6×4 char array
    1
    0
    1
    0
    0
    1
    % is this code correct???
    for i=1:size(a,1)
if a(i)=='pass'
a(i)=1
else
a(i)=0
end

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Ron Herman 2020-5-1

I am not getting any result in matlab

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Answer 1

Stephen23 2020-5-1

0
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https://ww2.mathworks.cn/matlabcentral/answers/522134-converting-a-coloumn-of-characters-into-number-for-logistic-regression#answer_429506

编辑：Stephen23 2020-5-1

在 MATLAB Online 中打开

For that character array:

>> v = all(a=='pass',2)
v =
  1
  0
  1
  0
  0
  1

If you really have a cell array of characte vectors use strcmp or strcmpi:

>> c = cellstr(a);
>> v = strcmpi(c,'pass')
v =
  1
  0
  1
  0
  0
  1

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Ron Herman 2020-5-1

Sir I observed that the code is saving it as logical array.

Any line of code to convert it to double or integer type.

Stephen23 2020-5-1

在 MATLAB Online 中打开

V = double(V)

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Converting a coloumn of characters into number for logistic regression

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Converting a coloumn of characters into number for logistic regression

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