finding the file names with similar strings and group them together

In a file I have a bunch of plots which I would like to plot the one which have the same hyper-parameters (values for given variable with slightly difference between names) side by side but I don't know whether I should extract the string of file names and find hyper parameters or there is a simpler way? Here is my code

im1='beta_win_loss_1.00_win_bias_0.60_context_rigid_1_win_optimism_0.65_win_optimism_rigid_1_risk_base_2_risk_val_4_No_optimism_0.65_No_optimism_rigid_100_loss_base_3_loss_val_3.jpg';
im2='noisy_cue_beta_win_loss_1.00_win_bias_0.60_context_rigid_1_optimism_0.65_optimism_rigid_1_risk_base_2_risk_val_4_No_optimism_0.65_No_optimism_rigid_100_loss_base_3_loss_val_3.jpg';
[X1,map1]=imread(im1);
[X2,map2]=imread(im2);
p1 = [0.0 0.0 0.5 1];
p2 = [0.5 0.0 0.5 1];
 
subplot('Position',p1), imshow(X1,map1,'Border','tight');
subplot('Position',p2), imshow(X2,map2,'Border','tight');
set(gcf, 'PaperUnits', 'inches');
x_width=8.25 ;
y_width=11.125;
set(gcf, 'PaperPosition', [0 0 x_width y_width]); %
img='combine_noisy_cue_beta_win_loss_1.00_win_bias_0.60_context_rigid_1_optimism_0.65_optimism_rigid_1_risk_base_2_risk_val_4_NoLoss_optimism_0.65_NoLoss_optimism_rigid_100_loss_base_3_loss_val_3.png';
print(gcf,img,'-dpng','-r400'); 

[Image Analyst]

Those are quite the filenames! But you forgot to attach them so we can't call your imread()'s. Please attach the images so we can run your code. I'm not really sure what you want to do. Do you want to parse some strings or numbers out of those super long filenames?

[Zahra Sheikhbahaee]

exactly! I would like to parse string and numbers and find similar ones to combine in a single figure.

[Zahra Sheikhbahaee]

What if I use these lines to compare two image names:

Num1=str2double(regexp(im1,'\d*','match')');
Num2=str2double(regexp(im2,'\d*','match')');
tf = isequal(Num1,Num2);

Now the problem is how to get list of images from files with a given pattern and loop over them. Any thoughts?