[Kst] [Bug 106008] New: NaN values should not be skipped while importing data from ASCII file

[Nicolas Brisset]

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http://bugs.kde.org/show_bug.cgi?id=106008         
           Summary: NaN values should not be skipped while importing data
                    from ASCII file
           Product: kst
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kst kde org
        ReportedBy: nicolas.brisset eurocopter com


Version:           1.1.0_beta2 (using KDE KDE 3.4.0)
Installed from:    Compiled From Sources
Compiler:          gcc 3.3.3 
OS:                Linux

When loading vectors from an ASCII files, NaN (Not a Number) values are skipped, which can result in pretty bad and hard to understand problems. For instance, imagine I have a file with X and Y vectors, with some data missing and replaced by some non-numeric text string in the data file (it sometimes happens in the real world!). If 10 values are missing for X and 20 for Y, when I plot Y vs X I may get erratic results because of the skipped values and automatic interpolation performed by kst.
I think NaN values should be preserved in the vectors, and resulting points skipped when plotting. If the plot uses lines, when there are such points they should be "cut".