Converting string to number

[persol]

I am receiving data as string format but they are numbers is there anyway to convert them to number format? because i am trying to use comparision functuons and apparantly to make a correct comparision they have to be in number format otherwise it will give you wron results. Thank you

[waldemar.hersacher]

To convert a string to a number you can use from the String palette the Scan from String function.
Or do you mean that the string contains the number in binary format. Then use the String to Byte array primitive to get the characters as numbers. If the numbers are of other than U8 you must use the Join Numbers primitive to get it as I16 or I32.

[Dennis_Knutson]

duplicate post

[persol]

Yeah i am using that function, but the problem is sometimes device sends characters and sometimes numbers and i am not sure what operation to use in "edit Scan String" because if i choose %f it can't scan the characters, i am currently using %[^ ] to scan the data.

P.S Are compariosion functions able to compare two numbers if they are in string format?

[Dennis_Knutson]

You will need to explain a bit more. In your earlier post, you gave the example 'A= 122  B=17% C=012 '. Are you saying that you might have something like 'A= cdf  B=t% C=xyz '?.

[persol]

No , it is somtimes like A=122 B=17% ... and somtimes like A=--- B=--- , so i have combination of numbers and characters to scan what format should i use?

[persol]

No , it is somtimes like A=122 B=17% ... and somtimes like A=--- B=--- , so i have combination of numbers and characters to scan what format should i use?

[Pradeep Qtest]

So you are having either a number or '----' only or any random character ?

You may need to do few steps here:

Firsat search for "A=". From the remaining string (excluding A=) search for "B=". Use the before match string output for converting to number. Use 0 as the default. Continue with "C=" from the remaining string.

Hope it helps

_Pradeep

[Dennis_Knutson]

If the instrument is not returning numbers at times, you could the scan from string and format string that you already got and use the error to determine what to do. For example, you might want to just discard that reading. Wire up the error out to a case statement. Only do the comparison/plotting/whatever in the no error case. If the instrument supports such a command, you might want to query it to see why it did not return a numeric value. does the instrument manual explain what would cause this?