How to empty part of column?

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Seong Nam
Seong Nam 2017-4-25
评论： Seong Nam 2017-4-26
Say I have an column array that looks something like this:
A = [1:10]'
A =
1
2
3
4
5
6
7
8
9
10
If I wanted to get rid of 3 to 8, what would be the command?

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采纳的回答

the cyclist
the cyclist 2017-4-25
A(A>=3 & A<=8) = [];
  1 个评论
the cyclist
the cyclist 2017-4-25
Note that this will remove elements with values equal to 3-8, not the elements in positions 3-8. (Your example is ambiguous about which of these you want.)

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更多回答（1 个）

the cyclist
the cyclist 2017-4-25
A(3:8) = [];
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Walter Roberson
Walter Roberson 2017-4-25
196:2:-296 is the empty vector. When you use a positive increment (or use the default increment of 1) then if the last value is less than the first value, the result will be empty.
If you were to code
I(196:-2:-296) = [ ]
then 196:-2:-296 would not be empty, but you cannot use negative values as subscripts.
You probably want
I(I <= 196 & I >= -296) = [];
Seong Nam
Seong Nam 2017-4-26
This helped. Thank you!

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