MATLAB Programming

4 M-File Programming
function [vout1 vout2 ... varargout] = myfun(vin1, vin2, ...)
The code within the function builds the varargout cell array. The content and
order of elements in the cell array determines how MATLAB assigns optional
return values to output variables in the function call.
Inthecasewherevarargout is the only variable shown to the left of the
equal sign in the function definition line, MATLAB assigns varargout{1} to
the first output variable, varargout{2} tothesecond,andsoon.Ifthereare
other outputs declared in the function definition line, then MATLAB assigns
those outputs to the leftmost output variables in the call statement, and then
assigns outputs taken from the varargout array to the remaining output
variables in the order just described.
This function builds the varargout array using descending rows of a 5-by-5
matrix. The function is capable of returning up to six outputs:
function varargout = byRow(a)
varargout{1} = ' With VARARGOUT constructed by row ...';
for k = 1:5
row = 5 - (k-1);
% Reverse row order
varargout{k+1} = a(row,:);
end
Call the function, assigning outputs to four variables. MATLAB returns
varargout{1:4}, with rows of the matrix in varargout{2:4} and in the order
in which they were stored by the function:
[text r1 r2 r3] = byRow(magic(5))
text =
With VARARGOUT constructed by row ...
r1 =
11 18 25 2 9
r2 =
10 12 19 21 3
r3 =
4 6 13 20 22
A similar function builds the varargout array using diagonals of a 5-by-5
matrix:
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