a=rand(50,50);
imagesc(a);
colormap('gray')
a(37,:)=0;
imagesc(a);
max(a(:))

ans =

    0.9997

a(10:20,20:30)=1.0;
imagesc(a)
im=imread('cameraman.tif');
imagesc(im)
size(im)

ans =

   256   256

sh=circshift(im,[20 0]);
figure
imagesc(sh)
colormap(gray)
figure(1)
figure(2)
sh=circshift(im,[20 50]);
imagesc(sh)


url='http://www.cs.umass.edu/~elm/Teaching/Images/mms.jpg';
url

url =

http://www.cs.umass.edu/~elm/Teaching/Images/mms.jpg

mms=imread(url);
size(mms)

ans =

   428   500     3

imagesc(mms)
redchan=mms(:,:,1);
figure
colormap(gray)
imagesc(redchan);
impixelinfo
impixelinfo
md=mms;
md(:,:,1)=mms(:,:,2);
md(:,:,2)=mms(:,:,1);
imagesc(md)
md2=mms;
md2(:,:,3)=zeros(428,500);
imagesc(md2)
figure
imagesc(mms)



im1=rand(20,20);
imagesc(im1)
colormap(gray)
im2=rand(20,20);
imagesc(im2)
im3=rand(20,20);
imagesc(im3)
colim=[im1; im2; im3];
size(colim)

ans =

    60    20

clear colim;
colim(:,:,1)=im1;
colim(:,:,2)=im2;
colim(:,:,3)=im3;
size(colim)

ans =

    20    20     3

imagesc(colim)
colormap(gray)
imagesc(colim)
clf
close all
imagesc(mms)
mms(:,:,1)=circshift(mms(:,:,1),[0 5]);
imagesc(mms)
mms(:,:,1)=circshift(mms(:,:,1),[0 25]);
imagesc(mms)
figure
or=imread(url);
imagesc(or)
mms=or;
mms(:,:,1)=circshift(mms(:,:,1),[0 25]);
imagesc(mms)
mms=or;
imagesc(mms)
size(mms)

ans =

   428   500     3

topthird=mms(1:142,:,:);
imagesc(topthird)

diary	diary1

pwd

ans =

/Users/elm

diary off