Loading .mat file problem

Question

Sazcl 2023-4-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1949183-loading-mat-file-problem

评论： Sazcl 2023-4-18

Hi everyone,

When I uploaded a .mat file to MATLAB, the name of the file appears as "ans" in workspace. Is there any way to correct it? Thanks in advance.

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Answer 1

VBBV 2023-4-18

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https://ww2.mathworks.cn/matlabcentral/answers/1949183-loading-mat-file-problem#answer_1218233

编辑：VBBV 2023-4-18

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Assign the data to a variable e.g. Data or Data1, Data2 ... if there are more than one file, and access the data using a dot operator as below,

% Assign the data in mat file to a variable 
Data1 = load('data_B6_RC1.mat');
Data2 = load('data_B6_RC2.mat');
%...
% access the data from the Data variable  ... Data is Struct variable 
t = Data1.data_B6_RC1(1,:);
vs = Data1.data_B6_RC1(2,:);
vc = Data1.data_B6_RC1(3,:);

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Sazcl 2023-4-18

it worked, thanks!

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Answer 2

Cameron 2023-4-18

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https://ww2.mathworks.cn/matlabcentral/answers/1949183-loading-mat-file-problem#answer_1218208

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It looks like when the .mat file was saved, the variables weren't saved with their proper names. You could just keep it as it is and do this:

load('data_B6_RC.mat');
t = ans(1,:);
vs = ans(2,:);
vc = ans(3,:);

Or you could resave it as

load('data_B6_RC.mat');
t = ans(1,:);
vs = ans(2,:);
vc = ans(3,:);
save('data_B6_RC_new.mat','t','vs','vc')

and just use the data_B6_RC_new.mat file instead. Or you could overwrite the old file.

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Sazcl 2023-4-18

I know that the first block of code works, but there is a problem with it: when I upload more than one file, only the last uploaded file appears in workspace because both of them are in workspace with the name "ans". Unfortunately, the second code block didn't work for me.

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