Splitting string with changing length length

[gshemer]

Hi,

I am trying to read the position of an automatic stage in X,Y,Z axes. The stage returns a string of the three axes, and I would like to get the position of each axis separately. The thing is that the length of the string changes as the stage moves, so I cannot simply split at a predetermined offset.

Any help will be appreciated,

Gaby 

[Yamaeda]

Under String -> Additional String Functions you'll find "Search/split string" which sounds like a solution to me. I'm assuming you have a space or comma between the values by which you can split the string.

/Yamaeda

[gshemer]

Thanks for the quick reply. But it doesn't really help, since the as the stage moves (e.g from the 0 0 0 position to the 100 -100 200 position) the length of the string changes and with it the place from which the scan should begin.

[Yamaeda]

Check this idea, it's a small loop that looks for spaces and cuts the string at those locations, while building an array of the values.

the end result should be a value-array with your x,y,z-values.

(i hope, i'm no pro at this) 🙂

/Y

[Yamaeda]

The Search function also gives the index where it found the character, which is reused by the shift register to know where to look the 2nd time around ...

*update*

Some quick testing shows my inital version is suboptimal (though functions, strangly enough). Since i send the "cut down" version of the string to the shift register you'll always start looking at position 0.

[gshemer]

Thanks for the Vi, but I have I don't have Labview 8.2.  Could you please save it in Labview 8.0.

Thanks again,

Gaby

[Yamaeda · Accepted solution]

I hope this is what you're looking for. 🙂

[DFGray]

There is an easier way.  Use the Spreadsheet String to Array primitive to do it in one node.  No loops required.  This primitive (and its inverse) is useful any time you have a token separated string to parse in a regular fashion.

 

Message Edited by DFGray on 11-25-2008 07:41 AM