Parse string into array for comparison

[amita]

Hi All,

I am trying to parse a string message into an array of numbers so I can check if my event was successful.

\FF\FE\01\FD\02\00\00\00

I know I just need to read through and discard the \, but I don't know how to do that in Labview. I just need to check if the 6th byte = 00 or not.

Thanks! I mostly need help with parsing in labview.

[Harold_Timmis]

right click on the string and click the slash code.

[Darin.K]

I would use the spreadsheet string to array vi with "\" as the delimeter and convert to unsigned bytes.  See example.

[altenbach]

Assuming this is a plain ASCII string containing the letters 0..F and "\" as delimiter, you can simply used "Spreadsheet string to array" with the following settings:

Type= 1D U8 array

format= %x

delimiter= "\"

 

One problem is the extra delimiter at the beginning, so use array subset to skip the first element.

(EDIT: Ahh, Darin beat me with a similar solution. Mine's a little easier ;)).

Message Edited by altenbach on 08-06-2009 04:30 PM

[Darin.K]

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altenbach wrote:

(EDIT: Ahh, Darin beat me with a similar solution. Mine's a little easier).

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I was expecting you to have some byte-swapping, type-casting, hex-code-displaying, quick-dropping action that would somehow manage to do it in a single step. 

Message Edited by Darin.K on 08-06-2009 07:40 PM

[smercurio_fc]

Well, technically, the original question was

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amita wrote: I just need to check if the 6th byte = 00 or not.

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Thus, you could simply just do this:

 

Message Edited by smercurio_fc on 08-07-2009 10:11 AM

[altenbach]

Well, I did not read that far.... 😮

[altenbach]

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amita wrote: I just need to check if the 6th byte = 00 or not.

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Here's yet another variation... 😉

Message Edited by altenbach on 08-07-2009 04:59 PM

[Darin.K]

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amita wrote:

Thanks! I mostly need help with parsing in labview.

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Parsing the question is almost as much fun as answering it.    I originally considered this solution as a more general demonstration of parsing strings in LV.  When I have a (complex) string to parse I often use 'Scan String for Tokens'  as shown in this example.  Not much harder than the other solutions and no need to deal with the issue of the leading '\'.  I think we still need a Rube Golderg solution as well as an obfuscated version.