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Incorrect behavior of str2num?

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Arjan Lampe
Arjan Lampe 2020-5-13
评论： Arjan Lampe 2020-5-13
Hi,
This seems not to work as intended:
>> str2num('"Y"')
ans =
"Y"
This should return an empty array.
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Image Analyst
Image Analyst 2020-5-13
编辑：Image Analyst 2020-5-13
In r2020a:
>> str2num('"Y"')
ans =
[]
as expected, since it's not a number. So the best answer is to upgrade. Can you do that? Are you on the maintenance plan?
Arjan Lampe
Arjan Lampe 2020-5-13
Well, my company is, but I've just merged to R2018b a month ago or so. So upgrading is not going to happen soon... Anyway, I'll work my way around it then.

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2020-5-13
Seems that way.
>> version
ans =
'9.5.0.1298439 (R2018b) Update 7'
>> str2num('"Y"')
ans =
"Y"
>> version
ans =
'9.7.0.1319299 (R2019b) Update 5'
>> str2num('"Y"')
ans =
[]

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