0 个投票

Hi,
I am seeing a strange result in matlab using the OR operator.
This is what I am seeing:
K>> 5==1|2
ans =
1
I must be doing something wrong, but can't figure out what. Any ideas?

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Azzi Abdelmalek
Azzi Abdelmalek 2014-7-8

2 个投票

This is correct
5==1
The result is 0
0|2
the result is 1

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Azzi Abdelmalek
Azzi Abdelmalek 2014-7-8
Maybe you want
(5==1)|(5==2)
which gives 0
Adam
Adam 2014-7-9
You are correct, I needed the 5==1|5==2 format. Thank you for your response.
Just out of curiosity, what is the other format doing, i.e. why does 5==1|2 result in true?
Azzi Abdelmalek
Azzi Abdelmalek 2014-7-9
5==1|2
is the same then
(5==1)|2
Matlab consider each number different from zero as true
5==1 % is false
2 % is true
false | true %will give true
James Tursa
James Tursa 2014-7-9
编辑：James Tursa 2014-7-9
5==1 is done first and results in a logical value 0 (i.e., false)
Then 0|2 is done next. It is a logical OR and also returns a logical result. If either of the inputs is non-zero, then the result will be 1 (i.e., true), so that is what you get for your example.

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