topic Re: Format specifier HELP in LabVIEW

Format specifier HELP

Ross Stewart — Fri, 27 Jan 2012 16:05:10 GMT

I read this transmition from COM port 1 using VISA Interactive Control.

+0.0000000E+00\x00\x00\x00\x00\x00 -0.3127200E+02\x00\x00\x00\ x00\x00 +0.0000000E+00\x00\x00\x00\x00\x00 +0.0000000E+00\x00\ x00\x00\x00\x00 +0.0000000E+00\x00\x00\x00\x00\x00 +0.0000000E+ 00\x00\x00\x00\x00\x00 \x00\x00\r\n

I am using the Scan from String Function.

I need the Engineering format Numbers and want to ignore the "\x00". the space " " and then acquire the second number "-0.3127200E+02". And so on!

I have tried many different format specifiers without much luck! (I recieve only the first number)

Any help for a new user out there?

Thanks, Ross

Re: Format specifier HELP

nathand — Fri, 27 Jan 2012 17:27:34 GMT

If you always have exactly five \x00 separating the numbers, I'd use something like this:

Re: Format specifier HELP

Ross Stewart — Fri, 27 Jan 2012 18:51:27 GMT

You helped me! The characters \x00 were just representations of the VISA INTERACTIVE CONTROL, In the data stream they were actually

binary 0000 0000 0000 0000. I used search and replace patternVI to remove all characters I was not needing from stream. Thanks for your time, It lead to the answer I needed! THX

Re: Format specifier HELP

ben64 — Fri, 27 Jan 2012 19:55:57 GMT

The regex you're using will also remove the decimal point and it will not remove the useless zeroes. If it is the second value that you want and the strings all have the same pattern (a 0 value, the significative value, 3 sets of 0 values) you can use the following code to extract them all. It will also work with an input string that contain multiple lines.

Ben64

Re: Format specifier HELP

RavensFan — Sat, 28 Jan 2012 17:44:08 GMT

@Ross Stewart wrote:

You helped me! THX

Then you should mark Nathan's post as the solution to your question rather than your thank you post. Please, go to the options menu to the upper right of your message to unmark your post as the solution so you can then go and properly mark Nathan's post.