How to add "for loop"

in workspace i have "dinfo" having 11x1 struct as shown in figure, i want to access "name" as it has images in it, after reading that, need to convert it into double format for each image and storing that in a folder as "dataset.mat", can anyone please help me with the code please. Thank You

[Stephen23]

Multiple duplicates by the same OP:

https://www.mathworks.com/matlabcentral/answers/335741-loading-images-as-dataset-mat

https://www.mathworks.com/matlabcentral/answers/335201-struct-to-double-conversion

https://www.mathworks.com/matlabcentral/answers/334318-how-to-add-image-data-in-folder

https://www.mathworks.com/matlabcentral/answers/335201-struct-to-double-conversion

Both Image Analyst and I already explained to that those filenames are not images themselves, and gave a link to the wiki on how to load files in a loop:

https://www.mathworks.com/matlabcentral/answers/335201-struct-to-double-conversion#comment_445771

[Tousif Ahmed]

I didn't understand the part which you explained so i changed the question so that some other can understand what i have asked. Thank You

[Rik]

If you don't understand an answer, ask for clarification. By opening multiple questions that are essentially the same, you don't really generate goodwill. I think you should really start a tutorial to get to know the Matlab basics. I'm sure there are many of them in whatever language you prefer.

Answer 1

[Rik]

You're in luck. I usually ignore questions that don't show that the person asking has followed the advice from the question guide.

Images=cell(1,2);%pre-allocate a column-vector in the cell format
for n=1:length(dinfo)
    position=str2double(dinfo(n).name(1:(end-4)));%convert the filename to a number
    Images{position}=im2double(imread(dinfo(n).name));%read the image, convert to double and save in the cell
end

[Tousif Ahmed]

Thank you very much for your reply i will surely follow the instructions, unfortunately i am getting this error "Subscript indices must either be real positive integers or logicals."

[Tousif Ahmed]

sir, its working when the dinfo has 11x1 struct but not when i increased it to 24x1 struct, its showing this error "Subscript indices must either be real positive integers or logicals"

[Jan]

@Tousif: Please post the relevant code and the complete error message.

[Tousif Ahmed]

clc; clear all; %%

dinfo = dir('*.jpg');% image extension

%images=cell(1,2);%pre-allocate a column-vector in the cell format for n=1:length(dinfo) position=str2double(dinfo(n).name(1:(end-4)));%convert the filename to a number images{position}=double(imread(dinfo(n).name));%read the image, convert to double and save in the cell

end

I have 50 training

images of size 27x18, 4 test images of same size

example :if u type "load wine_database.mat", we get training and test in double format, i need the images to be in that format so that i can use it for "nprtool/nntool"

</matlabcentral/answers/uploaded_files/75443/wine.PNG>. I need in the format as shown in the reference image. I hope you are understanding what i am asking you