0 Stimmen

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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 Akzeptierte Antwort

Fangjun Jiang
Fangjun Jiang am 27 Mai 2020

0 Stimmen

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

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Nik Rocky
Nik Rocky am 27 Mai 2020
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 am 27 Mai 2020
all(), any()
Nik Rocky
Nik Rocky am 27 Mai 2020
TP1 =
0 0 0
>> TP2 = [0 1 0]
TP2 =
0 1 0
>> any(TP1)
ans =
logical
0
>> any(TP2)
ans =
logical
1
Right?
Walter Roberson
Walter Roberson am 27 Mai 2020
Yes.

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