isempty is allways zero

2020 5 27
1 个回答
回答已采纳
更新时间：2020 5 27
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0 个投票

Hello,
im using isempty:
TP =
0 0 0
>> isempty(TP)
ans =
logical
0
>> TP(3) = 1
TP =
0 0 1
>> isempty(TP)
ans =
logical
0
Why is locical answer still zero? What can I do? I need to check multiple arrays for empty or not in if-else blocks.

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 采纳的回答

Fangjun Jiang
Fangjun Jiang 2020-5-27

0 个投票

zero and empty are different
isempty([])
isempty(0)
isempty('')

4 个评论
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Nik Rocky
Nik Rocky 2020-5-27
Okay, and how can i detect a zero values?
For example:
TP =
0 0 0
>> ismember(TP,0)
ans =
1×3 logical array
1 1 1
>> TP(3) = 1
TP =
0 0 1
>> ismember(TP,0)
ans =
1×3 logical array
1 1 0
How can I do it for whole array and just get a value for all zeros 1 and for not all zeros 0?
Fangjun Jiang
Fangjun Jiang 2020-5-27
all(), any()
Nik Rocky
Nik Rocky 2020-5-27
TP1 =
0 0 0
>> TP2 = [0 1 0]
TP2 =
0 1 0
>> any(TP1)
ans =
logical
0
>> any(TP2)
ans =
logical
1
Right?

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