QtiPlot - News

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2009/06/22 - QtiPlot 0.9.7.8 released. Special thanks to Olivier Dubreuil for his bug reports and suggestions. Changes:

  • Slightly modified the Qwt 5.2 library in order to allow painting of 2D curves using floating point coordinates, resulting in a more accurate/smoother represantation of the data (the modified source code of this library is shipped with the QtiPlot archive in the "3rdparty/qwt" folder).
  • Implemented waterfall plots.
  • Added a powerfull exploration tool for 2D plots combining panning and continuous zooming.
  • Improved the export of 2D plots to the EMF format on Windows. Now when you copy a plot window or a layer, the images are stored to the clipboard as metafiles using EmfEngine.
  • Improved contour line plots. Now the user has the possibility to:
    • use the formula defined for the data source matrix in order to calculate Z values, resulting in smoother contour lines
    • display text labels for the Z contour levels
    • define custom Z levels
    • define custom colors and pen widths for each Z level
  • Improved Python scripting for 2D curves. Added scripting support for:
    • image/contour line plots (spectrograms)
    • histograms
    • waterfall plots
  • Fixed crash when calling newNote() in a Python script with Python 2.6 (thanks to Knut Franke).
  • Improved color handling for curves/symbols in a 2D plot:
    • the user can define custom colors.
    • it is straightforward to restrict all colors to a gray scale or to define indexed colors via the "Palette" plot layer context menu (Feature Request #00381).
  • Improved data fitting capabilities:
    • fixed fitting with user defined functions containing removable singularities.
    • improved display range of prediction and confidence bands.
    • implemented Feature Request #004587: "Fit through zero".
    • added planck_wavelength fit plugin, thanks to Knut Franke.
  • Improved the display of analytic 2D functions: in case of logarithmic x-scales the values are calculated using equidistant data points on the log scale.
  • Improved 2D plot layers context menu.
  • Fixed file saving for filenames containing dot signes.
  • Added Chinese translation thanks to Fox (Chen Zhang).

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