MATLAB: Loading a Variable with its Original Format

loading a variable with its original format

B is double. When I load B, this function put it in a struct format. How can I load B with double format?

C = load( ‘A.mat’, ‘B’);

Best Answer

 C = load( ‘A.mat’, ‘B’);
 B = C.B;

Note that you do not actually need to assign the variable B. Instead you can simply access the structure field whenever you need to:

 mean(C.B)

Although some people might tell you to do this:

 load( ‘A.mat’, ‘B’);

in fact this is a very bad way to load data. It means that variables magically "poof" into existence in the workspace. Much better is to load into a structure.

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MATLAB: How to programatically make workspace variable name same as the .mat file name loaded into Matlab

A much better approach than awful dynamic variable names is to use simple, efficient indexing, e.g.:

D = 'path to the directory where the files are saved';
S = dir(fullfile(D,'*.mat'));
for k = 1:numel(S)
    F = fullfile(D,S(k).name);
    C = struct2cell(load(F));
    S(k).data = C{1}; % assumes exactly ONE variable per file
end

All of the data will be stored in the structure S:

https://www.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-array.html

MATLAB: How to save image with its original name

Please see this example, you may able to fix it

Images=dir('C:\Lab\Hand stage 4\*.png'); % Complete path
outDirectory='C:\Lab\result_hand_2101\'; % To save image Create folder "result_hand_2101" in the path
for i=1:length(Images)
ImgName=strcat('C:\Lab\Hand stage 4\',Images(i).name);
grayImage=((imread(ImgName)));
%% say result image is enhancedImage1
imwrite(enhancedImage1,strcat(outDirectory,Images(i).name));
end

Best Answer

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MATLAB: How to programatically make workspace variable name same as the .mat file name loaded into Matlab

MATLAB: How to save image with its original name

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