Plotting and saving the picture with pcolor

Hello!

I have 180 data variables, which I would like to plot with pcolor and look at for 5 seconds and then it would be saved as .png, but I can't even get the first part to work. Here is my code:

list=who;
pause on

for i=1:180
   pcolor(list(i));shading flat;colorbar
   pause 5
end

As I understand, the variable list has strings with apostrophes, so list(i) will be 'variablename'. If anyone could help with the code, it would be very appreciated.

[Image Analyst]

If "list" is a variable containing strings with apostrophes in them (like perhaps a list of filenames or something), then why do you want to display that with pcolor(), which is intended for numerical data? Is list a cell array, or a character array, or a numerical array? What does it look like if you do

list
whos list

on the command line? Even is list is a numerical array with one number per index, then why are you using pcolor, where you lose the last column and last row, rather than image()?

[inga]

Each variable in the list is a 750x660 numerical data array, to which pcolor is the best option.

[Image Analyst]

I'd need more proof than that. Why do you want to lose the last row and column? Why can't image() or imshow() work in your situation, like they do for everyone else's 750x660 numerical array?

Answer 1

[Image Analyst]

Try this:

clc;
close all;
% Get rid of verything except the new variables which we will create.
clear all;
image1 = uint8(randi(255, [750, 660]));
image2 = uint8(randi(255, [750, 660]));
image3 = uint8(randi(255, [750, 660]));
% Get a cell array of the NAMES of the variables.
list=who;
% Loop over them, displaying each
for k = 1 : size(list, 1)
  % Display it with image()
  commandLine = sprintf('image(%s)', list{k});
  eval(commandLine);
  title(list{k}, 'FontSize', 30);
  % Apply a colormap and show a colorbar.
  colormap (jet(256));
  colorbar
  % Pause for 5 seconds to let user view it.
  pause(5);
end
msgbox('Done with demo');

[inga]

Thank you so so much with this, I edited this a bit and got it working.

[Image Analyst]

OK, great. Note that when you build this into your code, get rid of the code before the list=who command so that you don't blow away any variables and windows that your code needs (such as a GUIDE handles structure or things like that). Mark this Answer as "Accepted" if this solution works for you.

Answer 2

[Azzi Abdelmalek]

Example

list={magic(4),magic(5)}
for i=1:numel(list)
 pcolor(list{i}) ;
 shading flat;
 colorbar
 pause(5)
end