(New page: Category: ECE Category: ECE 301 Category: Fall Category: 2007 Category: mboutin Category: Matlab Category: Examples ==The Best Way== The best way to reverse a ...) 
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Latest revision as of 12:00, 18 December 2008
The Best Way
The best way to reverse a vector is probably as follows:
Say we have a vector,
 test = [1,2,3,4,5]
and we want to reverse the numbers to provide us with a new vector:
 newVector = [5,4,3,2,1]
To accomplish this without using a while loop or for loop, we can simply use the variable 'end', that is predefined in matlab:
 newVector = test(end:1:1)
What this statement say is take the last element of test ('end'), place that in the first element of newVector, then take the next last element of test ('end  1') and put it into the second element of newVector, and so on, until newVector is a reversed copy of test. This method works with both row and column vectors.
Other Ways
Use the function flipud(vector) to reverse a column vector quickly.
 >> flipud([1;2;3])
 ans =
 3
 2
 1
Use the function fliplr(vector) to reverse a row vector quickly.
 >> fliplr([1,2,3])
 ans =
 3 2 1