format of an output of a function

Question

alpedhuez 2021-1-24

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/725682-format-of-an-output-of-a-function

评论： alpedhuez 2021-1-25

Suppose A is 100*1 categorical and B is 100*1 categorical . As I run ismember(A,B), output is like

ans = 100*1 logical array
   1
   1
   1
   1
   1
   1
   1
    .
    .
    .
    

Thus I cannot see the output unless I auto-scroll that is not convenient. Is there any other way to display the output? For example, is it possible to have an output that does not require auto-scroll in the horizontal format such as

ans = 1 1 1 1 1 1 1 1 1 (100 of 1s)

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Answer 1

Walter Roberson 2021-1-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/725682-format-of-an-output-of-a-function#answer_605112

在 MATLAB Online 中打开

ismember(A,B).'

you would have received a row vector if A was a row vector

ismember(A(:).',B)

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Walter Roberson 2021-1-24

在 MATLAB Online 中打开

A = randi(3, 100,1);
B = [1 3];
SHOW("ismember(A,B)")
function SHOW(COMMAND)
  try
      output = evalc("evalin('caller', '" + COMMAND + "')");
  catch ME
      output = getReport(ME);
  end
  output = regexp(output, '\n', 'split');
  fig = uifigure('name', 'show output');
  figpos = fig.Position;
  tpos = [10, 10, figpos(3)-20, figpos(4)-20];
  tarea = uitextarea(fig, 'editable', 'off', 'Position', tpos, 'Value', output);
end

Unfortunately, I cannot demonstrate the output as the new Run facility here does not support uifigures .

Note that you have to pass the command to be executed as a string. You cannot use, for example,

SHOW(ismember(A,B))

The restriction is because the argument is always evaluated first, and it would get executed in a context where a single output was expected, which can lead to different behaviour of the function. Compare, for example,

disp(whos)

to

whos

alpedhuez 2021-1-25