Passing a string to a function

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kevin 2012-3-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/32838-passing-a-string-to-a-function

I have created several structures based on my data using eval. The names of the structures and the names of the fields are stored in seperate arrays and the names can be different depending on the data. How can I pass these strings into a functin such as fieldnames? I keep gettting errors that the input arguments cannot be 'cell' or 'char'. So if the name of my struct is in name(1,1) how can i run fieldnames(name(1,1))

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Answer 1

Wayne King 2012-3-20

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https://ww2.mathworks.cn/matlabcentral/answers/32838-passing-a-string-to-a-function#answer_41397

在 MATLAB Online 中打开

namestruct = 'test';
test = struct('x',randn(100,1),'y',randn(100,1));
namez = fieldnames(eval(namestruct))

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kevin 2012-3-20

Perfect! Thanks. I have another issue now. This worked fine and I now have the names of all my structs and their fields. Now how could I plot this data? I have concatenated the struct and field name together:

for i=1:1:length(namez)

struct_names{i,1}=horzcat('test.',namez{i});

end

now I want to plot struct_names{1,1}(1:100,1). I tried using eval again but could not get it to return the data.

kevin 2012-3-20