How to count field numbers of structure?

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GyuSang 2015-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/248885-how-to-count-field-numbers-of-structure

评论： Vincent Hall 2019-9-6

采纳的回答： KSSV

Please let me know how to count field numbers of structure as below.

Structure.A = zeros(10); Structure.B = zeros(10); Structure.C = zeros(10);

there are 3 fields in structure, and I want to know number '3'.

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Stephen23 2015-10-16

在 MATLAB Online 中打开

Use this:

numel(fieldnames(Structure))

Vincent Hall 2019-9-6

Thanks Stephen Cobeldick, that works nicely.

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KSSV 2015-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/248885-how-to-count-field-numbers-of-structure#answer_196141

length(fieldnames(Structure))

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GyuSang 2015-10-16

Thank you for your answer.

Jan 2015-10-16

@Jos: I've seen many bugs caused by using length too sloppy. In the current case fieldnames replies a cell vector, such that length is trustworthy here.

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