How to skip legend names if their values equal zero on particular piechat?

Question

Konstantin Tkachuk 2019-10-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/484207-how-to-skip-legend-names-if-their-values-equal-zero-on-particular-piechat

评论： Konstantin Tkachuk 2019-10-14

I am using the following code to plot piechart

labels = {Costs.name};
pie([Costs.GESAMT_ohne_D_Money_min]);
legend(labels);

Sometimes Costs.GESAMT_ohne_D_Money_min could have zero values so they are not printed on pie chart. Because of that labeling becomes wrong as it is not skipping the non-positive values.

How to fix that?

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Answer 1

Image Analyst 2019-10-8

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/484207-how-to-skip-legend-names-if-their-values-equal-zero-on-particular-piechat#answer_395319

在 MATLAB Online 中打开

Try this:

zeroIndexes = [Costs.GESAMT_ohne_D_Money_min] <= 0
labels2 = labels(zeroIndexes);  % Extract only the non-zero numbers.
pieData =  [Costs.GESAMT_ohne_D_Money_min]; % Initialize
pieData = pieData(zeroIndexes); % Extract only the non-zero numbers.
pie(pieData);
labels(labels2);

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Konstantin Tkachuk 2019-10-14

在 MATLAB Online 中打开

Thank you for the idea.

This is the working code I have in the result

nonZeroIndexes = [Costs.GESAMT_ohne_D_Money_min] > 0;
labels = {Costs.name};
labels = labels(nonZeroIndexes);  % Extract only the positive numbers.
pieData =  [Costs.GESAMT_ohne_D_Money_min]; % Initialize
pieData = pieData(nonZeroIndexes); % Extract only the positive numbers.
pie(pieData);
legend(labels);