示例：
clear all;
clc;
set(gca,\'nextplot\',\'replacechildren\',\'box\',\'off\',\'color\',\'b\',\'xgrid\',\'on\');
title(\'Get 20 frames of current window\');
%%
for j=1:20
plot(fft(eye(j+16)));
axis([-1. 1. -1. 1.]);
frame(j)=getframe(gcf); % get the frame
end
writegif(\'test.gif\',frame,0.1);
那么这个writegif函数如何写呢：
function res=writegif(name,frames,dt)
nframe = length(frames);
for i=1:nframe
[image,map] = frame2im(frames(i));
[im,map2] = rgb2ind(image,128);
if i==1
IMWRITE(im,map2,name,\'GIF\',\'WriteMode\',\'overwrite\',\'DelayTime\',dt,\'LoopCount\',inf);
else
IMWRITE(im,map2,name,\'WriteMode\',\'append\',\'DelayTime\',dt); %,\'LoopCount\',inf);
end
end
参数中name, 是gif文件的名字，frames就是抓取的帧，dt为每帧间的间隔。
clear all;
clc;
set(gca,\'nextplot\',\'replacechildren\',\'box\',\'off\',\'color\',\'b\',\'xgrid\',\'on\');
title(\'Get 20 frames of current window\');
%%
for j=1:20
plot(fft(eye(j+16)));
axis([-1. 1. -1. 1.]);
frame(j)=getframe(gcf); % get the frame
end
writegif(\'test.gif\',frame,0.1);
那么这个writegif函数如何写呢：
function res=writegif(name,frames,dt)
nframe = length(frames);
for i=1:nframe
[image,map] = frame2im(frames(i));
[im,map2] = rgb2ind(image,128);
if i==1
IMWRITE(im,map2,name,\'GIF\',\'WriteMode\',\'overwrite\',\'DelayTime\',dt,\'LoopCount\',inf);
else
IMWRITE(im,map2,name,\'WriteMode\',\'append\',\'DelayTime\',dt); %,\'LoopCount\',inf);
end
end
参数中name, 是gif文件的名字，frames就是抓取的帧，dt为每帧间的间隔。
