QtiPlot

QtiPlot is a data analysis and scientific plotting. Free clone of Origin.

QtiPlot uses Qt and the excellent libraries Qwt, GSL, QwtPlot3D and Ingo Berg's Fast Mathematical Parser.

Features:

• Neat 2D and 3D data plotting
• ASCII-Import
• Spreadsheet and calculations in column-logic
• Great non-linear y=f(x) curve fitting and estimation of statistical errors of the fit-parameters

What is new in this release:

• Improvements:
• Improved support for the Dock menu on Mac OS X.
• Improved restoring of statistic tables.
• Improved handling of error messages in Savitzky-Golay smoothing filter.
• Improved plotting of 2D plot layers with shared axes.
• Improved error bar handling when plotting a table column selection.
• Implemented feature request #5451: "Do not expand tree in Project Explorer".
• Implemented feature request #5458: "Fit wizard remove only fits from session".
• Updated translations: Italian (thanks to Renato Rivoira), German (thanks to Daniel Schury) and Romanian.
• Updated Italian manual thanks to Renato Rivoira.
• Bug fixes:
• Fixed crash when opening old projects containing spectrograms.
• Fixed duplication of 2D plots with respect to the synchronization of scales.
• Fixed speed issues in matrices and removed size limitations in matrix size dialog.
• Fixed export of minus sign to LaTeX.
• Fixed possible crash when resetting the default options via the preferences dialog.

What is new in version 0.9.8.8:

• Improved import of Origin projects.
• Improved drawing of line symbol and added the possibility to use tabulator in 2D plot legends.
• Fixed clipping of top/bottom axis labels in 2D plots.
• Fixed saving of major ticks for 2D plot axes.
• Fixed restoring of 3D plots.
• Fixed export to SVG of texts in 3D plots.
• Fixed differentiation from table columns (the new plot was empty).
• Fixed paste selection in tables.

What is new in version 0.9.8.7:

• The import of OriginLab projects was highly improved: all versions from Origin 4.1 to 8.5.1 are now supported.
• Import of Excel files was improved.
• The matrix resample dialog was improved: now it is possible to freely resize a matrix.
• Support for 2D FFTs was added to the Python scripting engine.
• Handling of linear color maps was improved.
• The image profile tool was improved by adding the possibility to average over several pixels.
• The 3D plot dialog was improved by adding the possibility to view and modify axis rotation.
• Support was added for the regular modified cylindrical Bessel functions.

What is new in version 0.9.8.6:

• This release brings many new features and improvements:
• Waterfall plots were completely refactored and now it is possible to display multiple waterfall plots in the same plot window.
• Improved the script window.
• Added a new integration dialog (feature request #005293).
• Added an image preview in the export dialog (feature request #5311).
• Added the possibility to compress images exported to the tiff format (feature request #005313).
• Improved internal handling of date/time values.
• Improved table sorting.
• Improved import ASCII dialog so that all lines containing a custom string can be ignored.
• Added the possibility to enable/disable the display of gaps in 2D plot curves generated from table columns with empty cells.
• Improved 2D plot details dialog: added the possibility to hide/show curves and plot objects and the possibility to edit the data range of plot curves.
• Improved drawing of axis breaks.
• Bug fixes:
• Fixed import of ASCII files to matrices.
• Fixed import of table templates.
• Fixed import of empty table values from ASCII files.
• Fixed sorting of date/time data sets.
• Fixed restoring of table statistics.

What is new in version 0.9.8.5:

• This release brings support for the import of Origin 8.5 projects and fixes some major bugs.

What is new in version 0.9.8.4:

• This release highly improves statistical analysis capabilities of QtiPlot. A lot of advanced statistical tests were added:
• Normality test (Shapiro-Wilk).
• Student's t-Test with one or two samples.
• ANOVA tests (one-way and two-way).
• Chi-square test for variance.
• For statistical purposes a normal random generator was added.
• The plotting capabilities of QtiPlot were also improved:
• A canvas background image can now be displayed for 2D plots.
• 2D plot curves can now display custom images as data point symbols.
• Value labels can now be displayed for box and whiskers plots and for histograms.
• The mouse interaction with 2D plot layer elements has been improved.
• The scale limts for 3D plots can now be adjusted outside the plot data range.
• Enabled the possibility to add several 2D curves having the same column data source.
• General improvements:
• Implemented an import/export plugin interface.
• Added support for the import of databases: SQLite 3 (.db), dBase (.dbf) and Microsoft Access (.mdb) files can now be easily imported and visualised. On Windows, we also provide support for Microsoft Access .accdb files via ODBC.
• The import of Excel workbooks was fixed.
• Added export of tables/matrices to Open Document Spreadsheets (.ods) and to CSV format.
• The Python scripting engine was improved.
• The import of OriginLab projects was improved.
• The integration of analytical functions uses an improved method.
• Stephen Besch has done a lot of work on the user manual.
• New translations:
• Added an Italian translation thanks to Renato Rivoira.
• Manolis Stefanis provided a Greek translation.
• An incomplete Portuguese translation is also available.

What is new in version 0.9.8.3:

• A lot of new features are available in the matrix module:
• Added support for expanding/shrinking matrices using bilinear/bicubic interpolation.
• Matrices can now be smoothed using bilinear interpolation.
• Implemented table to matrix conversion for sparse XYZ data.
• Improved table to matrix conversion for uniform XYZ data.
• This release highly improves the QtiPlot/Python scripting engine:
• Standard Python scope rules are now honoured.
• Python API for 2D plots was improved: support was added for error bars, box and whiskers plots, pie plots and vector curves.
• Added the possibility to run all Python scripts in a user defined folder on QtiPlot startup.
• QtiPlot can also be run in server mode.
• General improvements:
• The import of OriginLab projects has been greatly improved.
• Improved auto completion: table column names are also suggested to the user.
• Improved output of the FFT routines.

What is new in version 0.9.8.2:

• A bug affecting changing of the scale type in 2D plots was fixed.
• Selection of multiple columns in tables using the "Shift" key was fixed.
• Restoring texts from OriginLab projects was improved.
• Now it is possible to reset the default options via the "Preferences..." dialog.
• By default, QtiPlot now opens the last used project.
• The confirmation dialog for updates searching can now be disabled.
• The user manual was improved.

What is new in version 0.9.8.1:

• The user has the possibility, via the 2D plot dialog, to edit or delete all other plot objects besides curves and also to rearrange the curves.
• The possibility to specify the axes for the new curves in the "Add/Remove curves..." dialog was added.
• Now it is possible to specify a default behavior for the plot grid using the "Preferences..." dialog.
• The possibility to disable antialiasing for 2D plot curves displaying large datasets was also added.
• The look and feel of the baseline dialog was improved.
• Now QtiPlot correctly renders stacked bar plots.
• The export of 2D plots to vectorial formats was fixed.