Conversion to double from struct is not possible.

Question

Víctor Magdaleno 2020-7-30

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https://ww2.mathworks.cn/matlabcentral/answers/573016-conversion-to-double-from-struct-is-not-possible

评论： Víctor Magdaleno 2020-8-8

Hello everyone,

I'm a matlab beginner. I imported txt files to matlab whitout problem, so I want to remove all DC noise of them in a loop. Could someone help me to reach this goal?

Filenames = dir('*mat'); 
numfiles1 = length(Filenames);
EEGSinDC = [];
for i = 1 : numfiles1
load (Filenames(i).name);
EEGSinDC(i) = Filenames(i);
EEGsinDC = EEGSinDC(i) - mean(EEGSinDC(i));  
end

Conversion to double from struct is not possible.

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James Tursa 2020-7-30

What variables are in the mat files?

Stephen23 2020-7-30

Víctor Magdaleno's incorrectly posted "Answer" moved here:

registro is the variable

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Answer 1

Alan Moses 2020-8-6

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在 MATLAB Online 中打开

The variable name can be used to select only the required data from the MAT file. To save the changes made to your data back to the MAT file, you can use the save function.You can use this piece of code to solve the issue:

Filenames = dir('*mat'); 
numfiles1 = length(Filenames);
 
for i = 1 : numfiles1
    %replace with your variable name in the below line of code
    load(Filenames(i).name, 'variableName');
    variableName = variableName - mean(variableName);
    %save(Filenames(i).name,' variableName ');
end

Alternately, you can use the matfile function if you wish to change the variables without loading the data into the workspace.

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Víctor Magdaleno 2020-8-8

thank you! It works properly now.

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Answer 2

Walter Roberson 2020-8-6

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/573016-conversion-to-double-from-struct-is-not-possible#answer_475939

在 MATLAB Online 中打开

Filenames = dir('*mat'); 
numfiles1 = length(Filenames);
EEGSinDC = cell(numfiles1, 1);
for i = 1 : numfiles1
  filedata = load(Filenames(i).name);
  EEGSinDC{i} = filedata.registro - mean(filedata.registro);
end