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Awk and checking options

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# 1  
Old 10-24-2010
Awk and checking options
My task is that when the user calls the script

1. If user calls script with
awk -v dtmax= -v stdlim= -f ../Scripts/add-rgauss-xt.awk fin.xt > fout.xt
rgauss will return mean + (stdlim * sigma)

2. If user calls script with
awk -v dtmax= -f ../Scripts/add-rgauss-xt.awk fin.xt > fout.xt
rgauss will return mean + (rg * sigma)

I have had a try but getting confused on a good way to achieve this

Code:
  function rgauss(mean, sigma, stdlim,     u1, u2, u3, rg) {
      u1 = (2.0 * rand()) - 1.0
      u2 = (2.0 * rand()) - 1.0
      u3 = (2.0 * rand()) - 1.0
      rg = u1 + u2 + u3
      if ( !stdlim ) {
          return mean + (rg * sigma)
      } else {
          return mean + (stdlim * sigma)
      }
  }

  NF == 2 {
      mean = $2
      sigma = dtmax / 3.0

      if ( !stdlim ) {
          time = rgauss(mean, sigma)
      } else {
          time = rgauss(mean, sigma, stdlim)
      }

  }

  { print }

# 2  
Old 10-24-2010
Perhaps you meant this:
Code:
{ print time }

probably you want it inside the NF==2 condition
# 3  
Old 10-24-2010
Was just wondering if I can have stdlim in rgauss and then check if the user sets it using -v stdlim=

Am getting also confused on local and global variable

Here the variables to rgauss are considered local but then I am trying to pass a global and checking it.
Code:
rgauss(mean, sigma, stdlim,     u1, u2, u3, rg)


Actually there's more to it, like this

dtvals is inputted using -v dtvals=

Code:
  BEGIN {

      srand()           # Get random numbers that are unpredictable
      Version = "V04"
      optdtvals = 0
      optlimits = 0
      optstdlim = 0

      if (ARGV[ARGC-1] == "-usage") {
          usage()
          exit 1
      }

      if (ARGV[ARGC-1] == "-help") {
          help(Version)
          exit 1
      }

      if (ARGV[ARGC-2] == "-dtvals") {
          optdtvals = 1
          ARGV[ARGC-2] = ARGV[ARGC-1]
          delete ARGV[ARGC-1]
      } else if (ARGV[ARGC-1] == "-dtvals") {
          optdtvals = 1
          delete ARGV[ARGC-1]
      }

      if (stdlim) optstdlim = 1

  }

  NF == 2 {
      mean = $2
      sigma = dtmax / 3.0

      if ( !stdlim ) {
          time = rgauss(mean, sigma)
      } else {
          time = rgauss(mean, sigma, stdlim)
      }

      if (optdtvals == 1) {
          time = time - mean
          if ($2 != 0) $2 = time
      } else if (optdtvals == 0) {
          if (($2 != 0) && (time > 0.0)) $2 = time
      }
  }

  { print }



---------- Post updated at 02:54 PM ---------- Previous update was at 02:08 PM ----------




Hi guys, let's consider one thing at a time. I have this code now which should make things easier

Code:
 NF == 2 {
      mean = $2
      sigma = dtmax / 3.0

      if ( !stdlim ) {
          time = rgauss(mean, sigma)
      } else {
          time = rgausslim(mean, sigma, stdlim)
      }
 }

The idea is that is the user does not specify stdlim using -v stdlim= I call rgauss, otherwise I call rgausslim. The problem is that the user can specify -v stdlim=0 and the code will call rgauss instead of rgausslim.
Last edited by kristinu; 10-24-2010 at 04:13 PM..
# 4  
Old 10-24-2010
Try:
Code:
if ( stdlim=="" ) {

# 5  
Old 10-24-2010
Brilliant Smilie
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