# select a rectangle from an frame
[l r t b ] = select(iFrame);
# import data from a data file
info = importdata('info.txt')
# Read image to a Cell struct
for i = 1:N
F{i} = imread(img_i);
end
# Create an struct/class
st = struct('name','lp','id',7,'age',22);
# use a figure show image
figure(1),imshow(iFrame);
# Draw 3D map
// use mesh() and surf() x=-4:0.1:4 y=-5:0.1:5 m = repmat(x,size(x),1); n = repmat(y,size(y),1); z = sqrt(m.^2 + n.^2)+eps; z = sin(z)./z; mesh(x,y,z); surf(x,y,z);
# plot several figure in one picture
subplot(m,n,i); imshow(img_i);
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