loading multiple groundtruth .mat files
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Hi and good day to all,
I have 8 ground truth labelled .mat files from videos done by the matlab labeller.
I am trying to load such and I am uncertain of the next move.
Can a profession assist me please?
I have gotten this far with google, here's my code!
Thank you in advance!!
filenames = {'Beat1GTruth.mat','Beat2GTruth.mat','Fight1GTruth.mat','Fight2GTruth.mat','Shoot1GTruth.mat'...
,'Shoot2GTruth.mat','Stab1GTruth.mat','Stab2GTruth.mat'};
for kk = 1:numel(filenames)
load(filenames{kk})
end
回答（1 个）
Always load into an output variable (which is a scalar structure), e.g.:
F = {'Beat1GTruth.mat', 'Beat2GTruth.mat', 'Fight1GTruth.mat', 'Fight2GTruth.mat', 'Shoot1GTruth.mat', 'Shoot2GTruth.mat', 'Stab1GTruth.mat', 'Stab2GTruth.mat'};
N = numel(F);
C = cell(1,N);
for kk = 1:N
S = load(F{kk}); % load into a structure
% you can do anything with the structure contents, e.g.:
C{kk} = S.somefield; % !!! use an appropriate fieldname !!!
end
See also:
8 个评论
Matpar
2020-4-13
Matpar
2020-4-13
Matpar
2020-4-13
Unfortunately each .mat file contain a differently-named variable. In future I strongly recommend that each .mat file should contain exactly the same variable names, this makes processing them in a loop easier and more robust.
Here is a work-around for your example files:
F = {'Beat1GTruth.mat', 'Beat2GTruth.mat', 'Fight1GTruth.mat', 'Fight2GTruth.mat', 'Shoot1GTruth.mat', 'Shoot2GTruth.mat', 'Stab1GTruth.mat', 'Stab2GTruth.mat'};
N = numel(F);
C = cell(1,N);
for kk = 1:N
S = load(F{kk}); % load into a structure
C(kk) = struct2cell(S); % !!! assumes only ONE field per structure !!!
end
T = [C{:}]; % optional but recommended: concatenate into one non-scalar structure
You can access the data in the non-scalar structure T using indexing and fieldnames:
For example, the MCOS data for the first file:
>> T(1).MCOS
ans =
3707764736
2
1
1
1
5
I am not sure how to do that but with trial research and my will I may get there, but i will welcome you teachings if you can demonstrate such with a link please!
In reference to your guidance,
Ok now this had no error running the operations.
I am seeing the S 1x1 struct variable in the workspace but there is only one field Stab2GTruth!!
Shouldn't I see the rest of the data file/field names from the other ,mat files loaded from the variable (F)!!???!!?? instead it is showing 8field with 1x1 groundTruth?!!!?!!
You do not appear to be running the complete code from my last comment.
Pease run the complete code that I gave, including the last line:
T = [C{:}];
T will then be a 1xN structure with two fields, it contains all of the data from all of your files.
Matpar
2020-4-14
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