Chapter 4: Programming in Matlab - College of the Redwoods

360 Chapter 4 Programming in Matlab
function [m,k]=mymax(v)
m=v(1);
k=1;
for i=1:length(v)
if v(i)>m
m=v(i);
k=i;
end
end
Test it on something where you can easily spot the maximum, as is the case
in the 5th position of the following vector.
>> v=[2 4 7 8 11 8 4 2 5]
v =
2 4 7 8 11 8 4 2 5
>> [m,i]=mymax(v)
m =
11
i =
5
Now for a comparison. First, mymax.
>> tic, [m,i]=mymax(v); toc
Elapsed time is 0.107614 seconds.
Now using Matlab’s max routine.
>> tic, [m,i]=max(v); toc
Elapsed time is 0.040215 seconds.