How to search for a number located anywhere in string

[kenoss]

I am trying to search a string for a number (integer or float) without knowing its index in the string and to extract it - whether in numeric or string format.  e.g. "the number 52.63 appears in this string"; I want to extract/identify "52.63"

The functions I come across seem to expect the index to be known or the number to be at index 0.  How can I achieve this?

Best regards.

Kenoss

[PaulG.]

Use the Search/Split Screen primitive. I'm sure there are plenty of examples in the Find and Example screen.

[LV_Pro]

Are there other numbers expected in the string? If not you can parse the string based on using the space between words as a delimiter, checking each "word" to see if it is a number.

[Rob_F1]

LabVIEW does not seem to have a function to pull any number from a string. We have an example of a way this can be done LV 8.6.1

Hope this helps

[Rob_F1]

I forgot the warning for my the previous example. If the string contains multiple numbers in various locations in the string, all numbers will get concatenated into one output number.

IE: a string like- "Yes 12 months and 5 days is acceptable"- would have an output of 125

[kenoss]

Thanks all for your variety of ideas which are very helpful!!  I found using "[-]?[.]?[0-9]+[.]?[0-9]*" in regular expression input of Match Pattern function does the trick.  Am investigating the individual meanings of this regular expression.

Many thanks.

[Cory_K]

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kenoss wrote:

Thanks all for your variety of ideas which are very helpful!!  I found using "[-]?[.]?[0-9]+[.]?[0-9]*" in regular expression input of Match Pattern function does the trick.  Am investigating the individual meanings of this regular expression.

Many thanks.

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I was about to explain, but I figured it would be quicker to just post the 'LabVIEW Help' details.

[TCPlomp]

If you are about to dive into the 'wonderfull world of Regular Expression' don't miss this (regular-expressions.info) site.

Ton

[Darren]

Check out [LabVIEW]\examples\general\strings.llb\Extract Numbers.vi.  Seems to work well on the example string you give in your initial post.  Is this what you were looking for?

[kenoss]

Thats where I got the idea Darren, there are alot of interesting add-ons out there!...