• QtiSAS (previously QtiKWS) is the cross-compiled program designed for the graphical visualisation, reduction, analysis, and fit
  of data produced by a small-angle neutron scattering (SANS) instrument.

• Initially QtiSAS was developed to analyse data “produced” by SANS instruments of the Jülich Centre for Neutron Science JCNS
  at the high flux reactor FRMII at Heinz Maier-Leibnitz Zentrum MLZ in Garching (Germany)

• but most of tools could be used for data analysis generated by any SANS instrument or data having nothing to do with SANS.

• QtiKWS is forked from the free software package QtiPlot (v.0.8.9) and QtiSAS is forked from QtiPlot v.0.9.8.9
  (2012, last open-source version).

• QtiPlot (until 2012) was open source platform independent alternative to proprietary scientific software like Origin,
  SigmaPlot, Regressi or Igor Pro.

• The numerical routines have been written in C/C++ whereas the menu interface has been written in Qt/C++.
  GNU-licensed mathematical library GSL is used for the implementation of mathematical algorithms.

• Tables, matrixes, 2D and 3D graphs could be saved as a single project file and easy accessible by the built project explorer.

QtiSAS (previously QtiKWS) is the cross-compiled program

QtiSAS v.18 [dd-MM-yyyy] Copyright(C): Vitaliy Pipich
forked from QtiPlot v.0.9.8.9 [svn 2288] (Ion Vasilief) CMI - Universiteit Utrecht release [02-11-2011] (Stephan Zevenhuizen)

QtiKWS :: SA(N)S data treatment and analysys framework

QtiPlot as a framework for scientific tools

The QtiPlot Handbook, Ion Vasilief, Roger Gadiou, Knut Franke, and Stephen Besch, December, 2011: “… QtiPlot is a program for two- and three-dimensional graphical presentation of data sets and for data analysis. The plots can be produced from data sets stored in tables or from analytical functions.

The project has been created by Ion Vasilief in 2000, and he was the only programmer between 2000 and 2005. Since 2006, new contributors have joined Ion and the project is hosted by BerliOS Developper. The software aims to be a tool for analysis and graphical representation of data in the way of commercial software like Origin.

QtiPlot is a dynamic tool, the plots created from data sets and the spreadsheets owing the data are interconected. When the spreadsheets are modified, all the objects in the depending plots (curves, axes scales, legends) are automatically updated. For example, deleting a spreadsheet or only some columns will automatically remove all the corresponding curves from the depending plots.

All settings of a complete set of tables, matrix and plots can be saved in project files, having the extention ”.qti“. These project files may be opened using the command line, or using the File menu, or by using the Open project icon from the File toolbar.

The plots can be exported to several graphic formats such as JPEG or PNG and inserted as images in documents or presentations. Data analysis operations (integration, interpolation, FFT, curve fitting, etc…) can be performed on the curves in a 2D plot via the Analysis menu. The results of all these operations are also stored in the project files. They can be visualized at any moment using the Results log command and can be deleted from the project file via the Clear Log Informations command.

When the application is launched, a new project file is created consisting of a grey main window (the workspace) which contains an empty table. In order to be operational, this workspace must be populated with tables storing data sets, either by creating empty tables first (New → New Table command) and then filling them with data, or by importing ASCII files (Import ASCII → Single File… command), which automatically creates new tables.

The user can easily navigate through the objects of a project file using the project explorer or the Windows menu. The project explorer also allows the user to perform various operations on the windows (tables and plots) in the workspace: hiding, minimazing, closing, renaming, printing, etc …”

Some non-crucial functionality, which makes complicate cross-compilation, is removed.

Removed stuff:

• Origin-reading
• Excel/Open Office import-export
• export Windows Enhanced Metafiles (.emf)

yes: GNU GENERAL PUBLIC LICENSE

GitLab repository:
QtiSAS Developing an ecosystem architected by Konstantin Kholostov

Follow building instructions at GitLab repository:

QtiSAS build.md file

2025-08-11 Started “transfer” QtiPlot manual to QtiSAS one:

https://www.qtisas.com/manual

QtiSAS :: GNU GENERAL PUBLIC LICENSE

QtiSAS :: Dependencies/Libraries

Optimal vertical resolution is above 1000.
But recently QtiSAS was optimised also for resolutions below 1000:

• if vertical resolution of display below 1000: log-viewer and project explorer are placed by default right;
• else: log-viewer and project explorer are placed by default down;

qtisas-2020-04-15-info.pdf

faqs-export-ascii.pdf

you are NOT forced to cite QtiSAS.
But in case you want to cite it and and don’t know how to do it, you can find some suggestions below.

[1] Vitaliy Pipich, “QtiSAS: user-friendly program for reduction, visualization, analysis and fit of SA(N)S data” (2020), URL https://www.qtisas.com
[2] V. Pipich, QtiSAS (2020), https://www.qtisas.com
[3] https://www.qtisas.com

unicode-in-labels.pdf

qtisas-default-color-map.pdf