[Kst] [Bug 107580] New: Datawizard should allow to reuse existing X vector

[Nicolas Brisset]

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http://bugs.kde.org/show_bug.cgi?id=107580         
           Summary: Datawizard should allow to reuse existing X vector
           Product: kst
           Version: unspecified
          Platform: unspecified
        OS/Version: Solaris
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: kst kde org
        ReportedBy: nicolas.brisset eurocopter com


Version:           1.1.0_devel (using KDE 3.4.0, compiled sources)
Compiler:          gcc version 3.4.3
OS:                SunOS (sun4u) release 5.8

One of the niftiest tools in kst is the datawizard, which is tightly integrated and quite useful. We use it a lot to look at time series, where the X vector is almost always time and the Y vector the variables we are looking at. We start by loading a few variables, and then load more according to what we find in the first series of variables. 
And that's where there is a painful problem: the X vector is always regenerated, even if we actually wanted to reuse an existing vector. Note that this can be very penalizing in terms of memory/CPU use! The only other option would be to create vectors one by one and then curves, a much lengthier process!

That is why I think the datawizard should offer an option (radiobuttons) to choose to either reuse an existing vector as X, or load it from the datasource along with the Y vectors. The drop-down list would either present a list of existing vectors or vectors provided by the datasource according to the radiobutton status.