Question

I don’t know how can I ask this question properly. Hope you will understand what I mean. I have a code in Matlab, and I’ve different processes. For example, if I use some tye of image (for example, *.bmp) I have to run some code in Matlab and if I have another type of image (*.jpg) I want to run another part of the code.

But, what I want to do is that at the beginning of the code Matlab asks ‘what kind of image?’ (for example, with the comand ‘disp), and then I would write ‘bmp’ or ‘jpg’ and run the related code. I prefer not using a loop, just ‘write’ the word, and it could identify the process.

How can I do it?

Answer 1

Use functional, structured programming:

function [some output args] = someFunction([some input args])

    answer = [ask question here]

    switch lower(answer)
        case 'bmp'
            [some (other) output args] = bmpfunction([some (other) input args]);
        case 'jpg'
            [some (other) output args] = jpgfunction([some (other) input args]);
        otherwise
            error('Unsupported image format.');
    end

end

function [some output args] = bmpfunction([some input args])
    ...
    [bmp operations]
    ...
end

function [some output args] = jpgfunction([some input args])
    ...
    [jpg operations]
    ...
end

Put this all in a single file. Then you can call the function in Matlab by typing

someFunction([some input args])

where of course, [some input args] etc. should be replaced everywhere with actually useful entities 🙂