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Re: Adding two strings together [message #92325 is a reply to message #92322]

Tue, 17 November 2015 19:05

Jim Pendleton
Messages: 165
Registered: November 2011

Senior Member

On Tuesday, November 17, 2015 at 7:36:30 PM UTC-7, Wayana Dolan wrote:
> So I'm having a devil of a time with something that should be easy.
>
> So I want the end product to look like 'Run07656_Seq0001_Scan012', for every scan in a file I have
> So I put the following in a loop for all of the scans
> x='Run0'+string(variable1)+'_Seq0001_Scan'+string(variable2)
> where variable 1 is the run (ex. 7657), and variable 2 is the scan (ex. 012).
>
> But for some reason they all print out like 'Run0 7656_Seq0001_Scan012'
>
>
> How so I make it so there is no space between the 0 and the 7?
>
> Please help!

When numbers are converted to strings by default using the STRING function, they generally include leading spaces. The traditional way around this is to call the STRTRIM() function, for example STRTRIM(variable1, 2)

If you're running 8.4 or later, I encourage more modern syntax, for example
IDL> x='Run0'+variable1.tostring()+'_Seq0001_Scan'+variable2.tost ring()
IDL> x
Run012345_Seq0001_Scan345

The .tostring() static method on IDL_Variable types implies trimming of both leading and trailing blanks.

For more on static methods, see http://www.exelisvis.com/docs/IDL_Variable.html

Jim P.

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[Message index]

		Adding two strings together By: wdolan on Tue, 17 November 2015 18:36
		Re: Adding two strings together By: wlandsman on Tue, 17 November 2015 19:01
		Re: Adding two strings together By: Jim Pendleton on Tue, 17 November 2015 19:05
		modern syntax By: greg.addr on Wed, 18 November 2015 03:47
		Re: modern syntax By: Fabzi on Wed, 18 November 2015 04:06

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