Graphics Programs Reference
In-Depth Information
Vectors
A vector is an ordered list of numbers. You can enter a vector of any lengthin
MATLAB by typing a list of numbers, separated by commas or spaces, inside
square brackets. For example,
>> Z = [2,4,6,8]
Z=
2
4
6
8
>>Y=[4-35-281]
Y=
4
-3
5
-2
8
1
Suppose you want to create a vector of values running from 1 to 9. Here's
how to do it without typing each number:
>> X = 1:9
X=
1
2
3
4
5
6
7
8
9
The notation 1:9 is used to represent a vector of numbers running from 1 to
9 in increments of 1. The increment can be specified as the second of three
arguments:
>> X = 0:2:10
X=
0
2
4
6
8
10
You can also use fractional or negative increments, for example, 0:0.1:1 or
100:-1:0 .
The elements of the vector X can be extracted as X(1) , X(2) , etc. For ex-
ample,
>> X(3)
ans =
4
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