saveas(gcf​,'folderna​me.jpg')に1​50度という名前で保​存したいのですがやり​方がわかりません.お​願いします

clear;
close all;

%foldername = "フォルダ名";
foldername = "150度";

im_list=dir(foldername);%フォルダ内のデータのリスト化%

file_name = {im_list.name};
file_name = file_name(~ismember(file_name, {'.', '..'})); 

for n = 1:size(file_name, 2)
    I = imread(fullfile(foldername, file_name{n}));
    
    if n <= 11
        subplot(4, 5, n);
        imshow(I)
        title(file_name{n})
        sgtitle(foldername)
        
    elseif n == 12
        subplot(4, 5, n);
        imshow(I)
        title(file_name{n})
        sgtitle(foldername)
        saveas(gcf,'foldername.jpg')
        
    elseif n <= 24
        subplot(4, 5, n-12);
        imshow(I)
        title(file_name{n})
        sgtitle(foldername)
    end
    
end

[Walter Roberson]

Duplicated by later https://www.mathworks.com/matlabcentral/answers/1973839-foldername-saveas-150-saveas?s_tid=prof_contriblnk