Add changing title to superimposed images while writing GIF

Hello, I am making a code to make GIF files out of a series of superimpositions of images but I'm not able to add a title that changes for every frame of the GIF. The code works perfectly for making GIFs with a colorbar, but no way I can add the title. Could someone help me? Thank you!

Here's the code:

figure4=figure(4)
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
M4=max((max(reshape(BBIO,503*647,146))'));

% Setting transparency conditions: if the pixel signal is > 0, then in matrix A it is marked as 1 (transparent). Otherwise it is 0 (opaque)
R4=reshape(BIO,503*647,146);
X=15;
for j=1:146; 
    for i=1:503*647;
            if R4(i,j)<X;
            R4(i,j)=0;
        else R4(i,j)=1;
            end       
    end
end
A4=reshape(R4,503,647,146);

% Generating images and saving them into GIF

for i=1:146

title(['\lambda=',sprintf('%d',2*i+678),'nm'])   
%%% I TRIED THIS BUT GIVES ME ONLY THE VALUE FOR i=1 %%%

ax1 = axes('Parent',figure4);
ax2 = axes('Parent',figure4);
clims=[X M4];
i1=imagesc(BIO(:,:,i),'Parent',ax2,clims);
colormap(ax2,jet);
hold on;
set(i1,'alphadata',A4(:,:,i));
colorbar;
c3=colorbar;
w=c3.Position;
c3.Position=[0.860954412414402,0.110072689511942,0.030111111111111,0.815160955347871]
set(c3,'YTick',[])
hold on;
imagesc(BIO_US_double(:,:,i),'Parent',ax1);
colormap(ax1,gray);
daspect(ax1,[1 1 1]);
daspect(ax2,[1 1 1]);
set(ax1,'Visible','off');
set(ax2,'Visible','off');
hold off;

% gif utilities
    drawnow;
    frame = getframe(4);
    im = frame2im(frame);
    [imind,cm] = rgb2ind(im,256);
    outfile = 'BIO.gif';
     % On the first loop, create the file. In subsequent loops, append.
    if i==1
        imwrite(imind,cm,outfile,'gif','DelayTime',0,'loopcount',inf);
    else
        imwrite(imind,cm,outfile,'gif','DelayTime',0,'writemode','append');
    end
end

clear('ax1','ax2','clims','i','j','lambda','M4','R4','A4','figure4','i1');

Answer 1

[Subhadeep Koley]

Hi, it is difficult to provide exact solution without your variable BBIO and BIO. But I have made some changes in your code to make it behave the way you like. You should assign the changing title to ax1 without setting its visibility to ‘off’. You can refer to the code below.

figure4=figure(4);
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
M4=max((max(reshape(BBIO,503*647,146))'));
% Setting transparency conditions: if the pixel signal is > 0, then in matrix A it is marked as 1 (transparent). Otherwise it is 0 (opaque)
R4=reshape(BIO,503*647,146);
X=15;
for j=1:146
    for i=1:503*647
        if R4(i,j)<X
            R4(i,j)=0;
        else
            R4(i,j)=1;
        end
    end
end
A4=reshape(R4,503,647,146);
% Generating images and saving them into GIF
for i=1:146
    ax1 = axes('Parent',figure4);
    ax2 = axes('Parent',figure4);
    clims=[X M4];
    i1=imagesc(BIO(:,:,i),'Parent',ax2,clims);
    colormap(ax2,jet);
    hold on;
    set(i1,'alphadata',A4(:,:,i));
    colorbar;
    c3=colorbar;
    w=c3.Position;
    c3.Position=[0.860954412414402,0.110072689511942,0.030111111111111,0.815160955347871];
    set(c3,'YTick',[])
    hold on;
    imagesc(BIO_US_double(:,:,i),'Parent',ax1);
    colormap(ax1,gray);
    daspect(ax1,[1 1 1]);
    daspect(ax2,[1 1 1]);
    % Set only ax2 visibility off not ax1
    set(ax2,'Visible','off');
    ax1.XTick = [];
    ax1.YTick = [];
    % Add your changing title to ax1
    title(ax1,['\lambda=',sprintf('%d',2*i+678),'nm']);
    hold off;
    % gif utilities
    drawnow;
    frame = getframe(4);
    im = frame2im(frame);
    [imind,cm] = rgb2ind(im,256);
    outfile = 'BIO.gif';
    % On the first loop, create the file. In subsequent loops, append.
    if i==1
        imwrite(imind,cm,outfile,'gif','DelayTime',0,'loopcount',inf);
    else
        imwrite(imind,cm,outfile,'gif','DelayTime',0,'writemode','append');
    end
    % Clearing the title for every last frame except for the last one
    if 146~=i
        title(ax1,'');
    end
end
clear('ax1','ax2','clims','i','j','lambda','M4','R4','A4','figure4','i1');

Hope this helps!

[Mirko Maturi]

It works perfectly!

Thank you very much!!! =)