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Removing a specific number from vector

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Ulrik Nash
Ulrik Nash 2011-6-17
评论： Walter Roberson 2022-8-8
Hi Everyone,
Suppose I have the following
A = 4
and
Z = [1 9 2 3 4 5]
how do I remove the value A from Z, to get
Z = [1 9 2 3 5]
Regards,
Ulrik.

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回答（4 个）

Gurudatha Pai
Gurudatha Pai 2011-6-17
A = 4;
Z = [1 9 2 3 4 5]
Z1 = Z(find(Z~=A))
that should work
Walter Roberson
Walter Roberson 2011-6-17
Z(Z==A) = [];
Warning: if you have floating point numbers instead of integers, you will usually need to compare with a tolerance instead of ==
Tiasa Ghosh
Tiasa Ghosh 2018-7-25
You can also use setdiff function.
a=4;
z=[1 9 2 3 4 5];
setdiff(z,a)
  2 个评论
Gospel Oh
Gospel Oh 2018-11-15
If the function were to be put into MatLab, the answer actually comes out to be an ordered version, missig the a:
ans = 1 2 3 5 9
close, but not quite
Paul Smits
Paul Smits 2019-4-26
@Gospel Oh
You may pass 'stable' as additional input to setdiff, to prevent sorting:
a=4;
z=[1 9 2 3 4 5];
setdiff(z,a,'stable')

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Richard Barrett-Jolley
Yes, that would work, but I would recommend simply:
Z=Z(Z~=A);
  4 个评论
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huda nawaf
huda nawaf 2022-8-7
HI
Im facing the same problem, but the size of A is more than one.
so Z=Z(Z~=A); does not work. Is there an alternative?
Thanks

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