Writing Grep matches into a global string variable

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Thu, 11/23/2023 - 03:01 am

Hello, 

Curious if there is a way to write several strings into one global string variable. For example, I have a 1D text wave with chemical formulas. I need to pull formulas that contain [15N] and store them all together in a global string, each formula separated by a ";". I was trying to do something like this:

// labelindex is the wave containing index numbers of cells containing [15N] in the chemical formulas.
// labelindex is created using Grep.
variable count = dimsize(labelindex,0)
for(i=0;i<count;i+=1)  //run through the text wave
    string name
    sprintf name,"%s", textwave[labelindex[i]]  //textwave contains all the chemical formulas
    print name
    name = replacestring("[",name,"/[")  //to avoid regex acting up on "[" or "]"
    name = replacestring("]",name,"/]")
    SNRcolornames = name   //SNRcolornames is the global string
endfor

 

I know this is not accurate yet because the end result of this is SNRcolornames with only one string recorded in it, which is the last match in the textwave. 

How do I make SNRcolornames store all matches separated by a ";"? 

 

Thanks for the help! 

Sincerely, 

Peeyush 

Is AddListItem your friend here?

DisplayHelpTopic("AddListItem")

See also the other related functions to deal with string lists.

 

November 23, 2023 at 03:20 am - Permalink

function/S matchlist(wave/T textwave, string regex)
    string strList = ""
    Extract/free textwave, wmatches, GrepString(textwave, regex)
    wfprintf strList, "%s;", wmatches
    return strList
end

 

November 23, 2023 at 04:55 am - Permalink

Thanks, Tony! I was able to work with GrepString for a different problem I was trying to tackle. 

November 30, 2023 at 08:03 am - Permalink