how to save a zone of figure as picture

if i use gcf , it get the whole figure saved . i just want to save a special zone of this figure. a rectangle zone , is there any way to make it ?

Answer 1

[Azzi Abdelmalek]

Use imrect to select a rectangle in your image, and get its position, then create a new image and save it

Answer 2

[Thomas Koelen]

im=imread('pout.tif');
imshow(im);
h=imrect(gca);
pos=wait(h);
im2=imcrop(im,pos);
imwrite(im2,'figurepart.bmp')

Automatically saves the crop you made. ofcourse you'll have im to the desired image.