Matlab Matrix

• Matrix A, B. What’s A(B)?

1. Elements of B are logical.

A =[1 2; 3 4]

1 2

3 4

B = [1 0; 1 0]

1 0

1 0

A(B) =

1 0

3 0

2. Elements of B are positive integers.

B = [1 1;2 2]

A(B) =

1 1

3 3

• Matrix A is x dimension A(:,:,:…), how to copy A to matrix B(n,:,:,:,…)’s first dimension B(1,:,:,:…)?

d = size(A);

B = zeros([n size(A)]);

B( 1, : ) = A( : );

“include” a .m file into another .m file

If you’re trying to call the main function of another file inside your first
file, just call it like any other MATLAB function.
If you’re trying to call a subfunction in the second file from within your
first file, you can have the main function in the second file be a
“switchyard” that accepts the name of the subfunction to call:

% begin switchyard.m
function y = switchyard(fcn, x)
% Call as:
% y = switchyard(‘mycos’, 1:10);
% or
% y = switchyard(‘mysin’, pi);

y = feval(fcn, x);

function y = mycos(x)
y = cos(x);
function y= mysin(x)
y = sin(x);
% end switchyard.m

or you can have the main function return a handle to the subfunction and
call them that way:

% begin createhandles.m
function s = createhandles
% Call as:
% s = createhandles
% y1 = s.mycos(1:10);
% y2 = s.mysin(pi);

s.mycos = @mycos;
s.mysin = @mysin;

function y = mycos(x)
y = cos(x);
function y= mysin(x)
y = sin(x);
% end createhandles.m

If the other file is a script, just run it by typing the name of the script.

 

– from http://www.mathworks.com/matlabcentral/newsreader/view_thread/156103