Contourf with loops and making movie from contourf

Hello,

I have three data files, namely- X, Y, Z. Each data file is 100(r) x 25(c). I wish to read the data from each files as 20(r) x 25(c) at a time. That is there are 5 time steps. And, finally want to plot as contour (ultimate goal is to make a movie from these 5 steps). Can anybody please suggest me how to do that? I am mostly struggling with the "contourf" portion for iterations (i.e., the steps). Thanks in advance.

~FAHD

Answer 1

[KSSV]

h = figure;
axis tight manual % this ensures that getframe() returns a consistent size
filename = 'test.gif';
for n = 1:1:5
    % Draw plot for y = x.^n
    [X,Y,Z] = peaks(100) ;
    Z = rand(100).*Z ;
    contourf(X,Y,Z) ;

      drawnow
      % Capture the plot as an image
      frame = getframe(h);
      im = frame2im(frame);
      [imind,cm] = rgb2ind(im,256);
      % Write to the GIF File
      if n == 1
          imwrite(imind,cm,filename,'gif', 'Loopcount',inf);
      else
          imwrite(imind,cm,filename,'gif','WriteMode','append');
      end
  end

[KSSV]

M Fahd commented:

Dear KSSV, thanks for your prompt help. Just curious, will it be possible to get the data reading in step of 20 rows at a time (wrt the example you put here)? Then, the data reading sequence will be row 1-20 (all columns), then row 21-40 (all columns) and so on. My actual data files are on the Order of 1.5 GB. Therefore, trying to code the thing keeping the actual data structure intact. Again, thanks a lot.

Mock data file: X = 100 rows x 25 columns Y = 100 rows x 25 columns Z = 100 rows x 25 columns trying to extract 20 rows x 25 columns at a time, and then plot using contourf. Thanks.

[KSSV]

Very much possible...how is your data?

[KSSV]

Data is not clear......it got three sheets......can you explain the data?

[KSSV]

Fahd commented:

There are three sheets- x-coordinates, y-coordinates and mole fraction. At every time, I want to read 361 rows from all three sheets simultaneously, and plot a contour plot of mole fraction. And, then move on to reading the next 361 rows (362-722) from all three sheets simultaneously, and plot the 2nd contour. As there are 1444 rows, there will be total 4 contour plots, from which I wish to make the GIF/movie. Does it make sense now? Thanks a lot for the helps. Appreciate it.

PS: Don't type comments in answer.....type in comments