Animating imagesc plots

I'm trying to animate an imagesc plot using refreshdata, but with these plots, there is no 'CDataSource' property with which I can link the data I would like to change and the new values. Is there a way to link data sources in imagesc plots? I know that there is a 'CData' property but this doesn't seem to work (at least in the way I've tried).

I currently have an array, plot it using imagesc, and under the hold condition, include a for loop which includes the varying data as well as the refreshdata, pause and drawnow commands.

This is just meant to be a simple animation displaying a simple concept, so as long as I can just update this data that is fine. Any other method ideas for animating arrays would be greatly appreciated.

*Note: I have used the refreshdata method for animating plots in the past, only it was using the plot command (not imagesc) and I was using 2 data sources.

[Jan]

What are "the varying data"? It would be helpful if you post the code, such that we can add the changes and do not have to create the whole code from scratch.

[James]

My apologies, wasn't thinking. Here's what I have so far. It's the beginnings of an animation showing the amplitude and phase behavior in cavity ring-down spectroscopy, so please excuse the odd array.

function Cavity( f,phi,reps )

%Cavity - written by James Mester

% This function shows the intensity modulation of the incident beam,

% cavity resonance and transmitted beam in cavity ring-down spectroscopy.

% VARIABLES:

% f - frequency (Hz)

% phi - phase difference (degrees)

% reps - repetitions (periods of f)

% define angular frequency

w = 2 * pi * f;

%define phase in radians

phir = phi * pi / 180;

%define period

T = 1 / f;

%define time vector

t = 0:.001:(reps*T);

%build cavity array

cavity = zeros(1001,1001);

cavity(:,:) = 1;

coeff = 100 / (500^2);

for x = -500:500

y(x+501) = coeff*x^2;

end

for i=1:25

for x=1:1001

cavity(x,200+i+floor(y(x)))=0;

cavity(x,800-i-ceil(y(x)))=0;

end

end

for x = 251:750

cavity(x,(225+ceil(y(x))):(775-ceil(y(x)))) = 0.2;

end

for x = 351:650

cavity(x,1:(201+floor(y(x)))) = 0.4;

end

for x = 401:600

cavity(x,(800-ceil(y(x))):1001) = 0.6;

end

%plot figure

figure(1);

% hold on

fig = imagesc(cavity);

colormap(bone)

set(fig,'CData',cavity)

% linkdata on

%for loop that varies intensity values

for i = 1:length(t)

for x = 351:650

cavity(x,1:(201+floor(y(x)))) = -0.3*cos(w*t(i))+0.7;

end

for x = 251:750

cavity(x,(225+ceil(y(x))):(775-ceil(y(x)))) = -0.4*cos(w*t(i)-phir)+0.6;

end

for x = 401:600

cavity(x,(800-ceil(y(x))):1001) = -0.2*cos(w*t(i)-phir)+0.8;

end

pause(0.01)

refreshdata(fig,'caller')

drawnow

end

% hold off

end

Answer 1

[Jan]

I suggest to ask Google for "animate Matlab CData".