How to extract number of fields and name of fields from a structure?

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Mr M. 2016-8-22

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回答： kintali narendra 2018-1-16

I have s.a = 1; s.b = 'abc'; s.c = []; How to extract the name of the fields: 'a', 'b', 'c'? And the number of fields: 3 (in this example)?

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Answer 1

kintali narendra 2018-1-16

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use length(fieldnames(structure)) to find the number of fields in a structure. In your case it is length(fieldnames(s)). To get the fieldnames use fieldnames(structure) in your case fieldnames(s) store the output in a different variable and call them.