Using a generated struct within a function

Question

Jamie England 2019-3-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/451203-using-a-generated-struct-within-a-function

编辑： Stephen23 2019-6-4

Hi all, I have generated some functions using the classification learner app and exported them to the work space. They appear within the workspace as a 1x1 struct. I have attempted to create a funtion that will read newly generated data and input into these classification functions to output what class the data is approximatley in. The issue is when I attempt to use the Train function there is an error as the x.predictFcn( C ) is not found. Is there a way I can put the predict function within my function? Thank you

function [C2,C10,C100] = Train(Pump,Date)
    c = sprintf('%s_Current.%s.csv',Pump,Date)
    
    if exist(c)
        C = xlsread(c);
        C = C([1:end],[2:end]);
        C2 = mean(C2A635.predictFcn(C));
        C10 = mean(C10A461.predictFcn(C));
        C100 = mean(C100A208.predictFcn(C));
    else
        C2 = 'NaN';
        C10 = 'NaN';  
        C100 = 'NaN';
    end
end

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Answer 1

Simon Mählkvist 2019-6-4

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https://ww2.mathworks.cn/matlabcentral/answers/451203-using-a-generated-struct-within-a-function#answer_377743

在 MATLAB Online 中打开

You can't access your local workspace from the function. Try adding x.predictFcn() to the function input as such:

function [C2,C10,C100] = Train(Pump,Date,x.predictFcn)

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Simon Mählkvist 2019-6-4

在 MATLAB Online 中打开

I was trying to be generall. The function Train need all data it is going to use and as such the functions you have created needs to be insterted or saved as proper functions.

Try this instead:

function [C2,C10,C100] = Train(Pump,Date,C2A635.predictFcn,C10A461.predictFcn,C100A208.predictFcn)
    c = sprintf('%s_Current.%s.csv',Pump,Date)
    
    if exist(c)
        C = xlsread(c);
        C = C([1:end],[2:end]);
        C2 = mean(C2A635.predictFcn(C));
        C10 = mean(C10A461.predictFcn(C));
        C100 = mean(C100A208.predictFcn(C));
    else
        C2 = 'NaN';
        C10 = 'NaN';  
        C100 = 'NaN';
    end
end

Stephen23 2019-6-4

编辑：Stephen23 2019-6-4

在 MATLAB Online 中打开

function [C2,C10,C100] = Train(Pump,Date,C2A635.predictFcn,C10A461.predictFcn,C100A208.predictFcn)
% Not valid for a function definition:         ^^^^^^^^^^^        ^^^^^^^^^^^         ^^^^^^^^^^^                            

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