Is there any way to find it?

i have to load a file in one callback function of gui in matlab. It will have two arrays. But i don't know the name of the stored arrays. I need to retrive them and use them in another callback function of the same gui. How do i do these tasks?

Answer 1

[Rik]

You can load the variables into a struct with the following syntax

s=load('yourfile.mat');

Then you can get the variable names it contains with the fieldnames function. To share this data between the two callbacks, you can simply use the guidata handles struct.

[new user 00]

totally understood. Ill just explain my case.i have a matfile with two arrays. i need to change the fieldname of these two arrays as per my wish so that i can use these arrays. for further calculations in another callback function. Im not getting any proper idea to do this.any suggestions?

[Stephen23]

"i need to change the fieldname of these two arrays as per my wish so that i can use these arrays. for further calculations in another callback function"

You will have to have some way to identify the fields, otherwise your mapping will be essentially random. Imagine if you import a mat file into a structure with fields need and coffee, and you want to rename these are hello and world. How do we know which new fieldnames should map to the existing fieldnames? What defines this mapping? Does need map to hello or to world? Does coffee map to hello or to world?

[Rik]

If you want to rename struct fields, you can read this blog post by Loren.

[new user 00]

@Stephen Cobeldick K.. Say I have an if condition to check the value of the first array element to identify the right field to be named correctly. Now how do I assess the fields one by one? The total number of fields is just 2. @Rik Wisselink Thank you so much. I'm sure it'll help me a lot.