Dynamic struct names with strings.

Question

BdS 2019-4-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/458161-dynamic-struct-names-with-strings

编辑： James Tursa 2019-4-24

采纳的回答： Walter Roberson

Hi

I have got a 4x1 cell (named= RankFileNames) with the following chars

'0_1_workspace_20190410.mat'

'0_2_workspace_20190228.mat'

'1_1_workspace_sectNorm_20190228.mat'

'1_2_workspace_sectNorm_20190410.mat'

I would like create the following dynamic struct: RawData.(RankFileNames{1,1}).factorlist=[2 4 5 3] next interation

RawData.(RankFileNames{2,1}).factorlist=[2 4 5 3] and so one

However, Matlab returns the following error: Invalid field name: '0_1_workspace_20190410.mat'.

I am not interested in getting the apostrophes. Desired solution: RawData.0_1_workspace_20190410.mat.factorlist and RawData.0_2_workspace_20190228.mat.factorlist

Do you have any hints? thank you in advance.

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Answer 1

Walter Roberson 2019-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/458161-dynamic-struct-names-with-strings#answer_371980

You cannot do that. Field names cannot begin with a number or an underscore. You would need to prefix the file name with something.

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Guillaume 2019-4-24

field names also can't have a .

The error message is entirely correct, your field names are invalid.

You could use matlab.lang.makeValidName to make valid field names out of your strings. This would change '1_1_workspace_sectNorm_20190228.mat' into 'x1_1_workspace_sectNorm_20190228_mat'

Walter Roberson 2019-4-24

.. I still think it was a mistake for them to have gone from a simple function name such as genvarname() for the rather forgettable matlab.lang.makeValidName()

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