Replace single character and leave the ones in expressions

Hi,
I'm looking for nice and elegant solution to my problem. Let's say I have a string "e+exp(e)". I want to replace all "e" with "1", excepts the one in "exp". I was trying to use regular expressions but I've failed after an hour... The solution should be able to solve things like replace "a" in "rand(a)" without changing rand. Basically I need to replace single character without replacing the ones in words/expressions.
Any ideas?
Certified LabVIEW Developer, Certified TestStand Developer
Solved!
Go to Solution.

No time for elegance right now, just brute force. I would pad the string with spaces on each end to remove end cases and then search for the character surrounded by non-word characters.
Message Edited by Darin.K on 04-14-2010 04:06 PM
Attachments:
VariableParsingRegex.png ‏18 KB

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The attached file is work inprogress, with some dummy data sp that I can test it out without having to connect to equipment.
The second tab is the one that I am having the problem with. the output array from the replace element appears to be starting at the index position of 1 rather than 0 but that is ok it is still show that the new data is placed in incrementing element locations. However the main array that I am trying to build that is suppose to take each new calculation and place it in the next index(row) does not ap
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Attachments:
regulation_tester_7_loops.vi ‏244 KB

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- You use local variables excessively which really complicates things. Try
not to use them and it will make your life easier.
- If you flowchart the design (very similar to a dataflow diagram, keep in
mind!) you want to gather data, calculate a value from that data, store the
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- You loop again if timepassed+1 is still less than some constant. Rather
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of the array right? Pass your result outside the loop, and enable indexing
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detailed understanding of your task at hand it's kind of hard to post actual
code suggestions for you.
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"nelsons" wrote in message
news:[email protected]...
> how do I create a 1d array that takes a single calculation and insert
> the result into the first row and then the next calculation the next
> time the loop passes that point and puts the results in thsecond row
> and so on until the loop is exited.
>
> The attached file is work inprogress, with some dummy data sp that I
> can test it out without having to connect to equipment.
> The second tab is the one that I am having the problem with. the
> output array from the replace element appears to be starting at the
> index position of 1 rather than 0 but that is ok it is still show that
> the new data is placed in incrementing element locations. However the
> main array that I am trying to build that is suppose to take each new
> calculation and place it in the next index(row) does not appear to be
> working or at least I am not getting any indication on the inidcator.
>
> Basically what I am attempting to do is is gather some pulses from
> adevice for a minute, place the results for a calculation, so that it
> displays then do the same again the next minute, but put these result
> in the next row and so on until the specifiied time has expired and
> the loop exits. I need to have all results displayed and keep building
> the array(display until, the end of the test)Eventually I will have to
> include a min max section that displays the min and max values
> calculated, but that should be easy with the min max function.Actually
> I thought this should have been easy but, I gues I can not see the
> forest through the trees. Can any one help to slear this up for me.

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Replace single character and leave the ones in expressions

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