… THE analysis TOOL.
Data Analysis - Numerical Mathematics - Visualization
- Basic Statistics.
You got the measurement data? StatFree helps you to find the
appropriate analysis, creates a Procedure to automatize the analysis, runs and
documents it!
You have an interest in mathematics? StatFree creates maps,
graphs, attractors, fractals and more!
You want to visualize your data? StatFree let you create
expressive graphs in 2D and 3D!
You need to do some basic statistics (t-test, F-test,
chi²-test, ANOVA, correlation, time series) and want a simple approach? StatFree does most of the
work in one click!
The version 8
StatFree let you do
- data management
- measurement analysis
· 23 build in functions
· 4 Operators
(numerical differentiation, numerical integration, iteration, Boolean relations)
· 4 continues densities
(Gauss, Student's t, Chi², F)
· 2
discrete densities (binomial, Poisson)
· 2 random number
generators (normal distributed, uniform distributed)
- equation editor that allows to
combine all functions, operators, densities, random number generators,
together with up to 999 variables into complex equations for numerical
evaluation
- two and three dimensional
graphics
- data visualization
- Function analysis
- Fourier transform (FFT and
inverse FFT)
- residual analysis to calculate
the optimal cutoff frequency for data filtering
- data filtering (F³ filter)
- spline approximation
- wavelet transform (Cohen-Daubechies-Feauveau wavelets - DWT and inverse DWT)
- Wavelet Multiresolution
Analysis
- exploration of deterministic
chaos
- numerical solutions of differential
equations e.g.
- Simple harmonic motion
- Damped pendulum
- Duffing oscillator
- Van der Pol equation
- calculation of statistical measures
(mean, sum, median, standard deviation, variance, standard error of mean,
minimum, maximum, lower quantile, upper quantile, effect size)
- t-test
- F-test
- Chi²-test
- ANOVA
- correlation
- regression
- time series
StatFree
comes with example data sets (*.txt) and example equations (*.sfq), a context sensitive help file and tutorials.
StatFree is
free for educational and non-commercial use. Otherwise please contact
Manfred Vieten (Email: Manfred.Vieten@uni-konstanz.de).
This software runs on Windows-based systems. It is
recommended to use a display with a resolution of 1280x1024 pixels or higher.
Download the latest version StatFree8410-20160924. The installer will automatically install the 64 or 32 bit version
depending on your Windows operation system.
What’s new?
StatFree version 8.4.1.0
of 24.09.2016 - Transpose within the Procedure Creator included.
StatFree version 8.4.0.0 of
19.06.2016 – The new command <Fix Cycle N | within the Procedure
Creator interpolates the selected columns to have a fixed number of data
lines. The command is particularly relevant for attractor analysis. The window
for creating graphs of measurement data is enhanced. In
addition the unwanted phase shift when iterating is removed.
StatFree version 8.3.0.2 of 27.01.2016 – Merging of the two data sets vertically added.
StatFree version 8.3.0.0 of
16.01.2016 - A function called log(Variable)
is included. It returns the last number within the column of the specified Variable.
From within the Procedure Operator selected or all log(Variable)
values can be recorded.
StatFree version 8.2.0.9
of 26.11.2015 - Two minor bugs (not updating header & wrongly added line
feeds while loading an equation) within Function Analysis removed.
StatFree version 8.2.0.8
of 14.11.2015 - Compiled for optimal use with Microsoft's Windows 10.
StatFree version 8.2.0.7
of 03.10.2015 - The ACS (AutoCycle Setting) parameter
can take values from 1 to 40, which is equivalent to the quantile setting in %.
The old setting 1, 2, 3, 4 corresponds to 10, 20, 30, 40 of the new setting.
StatFree version 8.2.0.3 of 20.09.2015 – The order to
calculate substitutions changed to A9, A8, …, A1, A0.
This can alter the way an equation with substitutions must be written.
StatFree version 8.2.0.0 of 22.08.2015 - Includes the
new functions 2D-AutoCycle and 3D-AutoCycle to
calculate attractor attributes of cyclic processes automatically.
StatFree version
8.1.0.3 of 05.10.2014 - The text sensitive help works for the 32 bit as
well as for the 64 bit version of StatFree. There is just one file - StatFreeInstall.exe, which will install StatFree version 32 bit or 64 bit depending on your Windows
operation system.
StatFree version
8.1.0.0 of 26.09.2014 - The creation of the "empirical
attractor" for cyclic 2D- and 3D-motion can be "Phase ordered"
beside "Time ordered" as previously introduced. As a default the
"Equation directory" can be set to be the "Working
directory".
StatFree version 8.0.0.0 of 17.10.2013 -
Newly included are the Procedures Creator (automatic progression builder), the
Procedure Operator (automatized mass analysis tool), equation path setting, and
the relative addressing.
StatFree version 8.0.0.0 beta of 21.04.2013 - available
as 32 & 64 bit versions. The 64 bit version does not display context
sensitive help (Sorry, this is caused by a compiler bug. Unfortunately, I can't
do anything but wait for a bug fix myself).
StatFree version
7.0.3.0 of 01.07.2012 – Wavelet Multiresolution Analysis / time-frequency
interpretation re-defined.
StatFree version 7.0.2.0 of 11.02.2012 – Indicator for
undefined symbols or variables within the various equation editors
included.
StatFree version 7.0.1.0 of 06.02.2012 – Function to
calculate an “empirical attractor” for a cyclic motion in 3D added. The
function calculates the mean, the standard deviation, and the standard error
for each component of a given cyclic track in 3D. Also, StatFree adjusts to the different DPI
settings.
StatFree version 7.0.0.0 of 05.01.2012 – Technical
upgrade, compiled for use with Windows 7 (32 bit). Substantial extension of Function
Analysis (3 instead of 1 function, their derivatives, and integrals
displayable) and Iterations can be performed to calculate (strange) attractors
etc. New display and manipulation tools are integrated within Wavelet
Multiresolution Analysis.
StatFree version
6.0.0.0 of 09.01.2011 – Major technical overhaul and new functionality.
New window Function Analysis included. Simpler writing of expressions
like exponents as (expression 1)^(expression 2), ln()
etc. Compiled for Window 7 but does work with Windows XP and Vista as
well.
StatFree version
5.1.1.0 of 11.10.2010 – tF
interpolation let you increase or decrease your data rate (frequency). The
new procedure uses a cubic spline. It allows to approximate your data set of a
given sampling rate to be displayed at an (in principle) arbitrary frequency.
StatFree version
5.1.0.0 of 03.01.2010 – New saving options (background saving, automatic
end session saving), UNDO option, and enhanced measurement visualization
(Median, Quantile, Min/Max).
StatFree version 5.0.2.0 of 11.11.2009 – Effect Size
within Basic Statistics added.
StatFree version
5.0.1.0 of 05.11.2009 – New function Multiplexing[m,n] added, which allows to disentangle
multiplexed data.
StatFree version 5.0.0.0 of 27.10.2009 – New
layout for easier navigation. Included is a Control Window with popup menu and
shortcut buttons.
StatFree version 4.4.2.0 of 05.04.2009 – Function
delay[n]() included, which takes the input from a variable
n lines before or, if n is negative after the actual value. Help file and
tutorial extended.
StatFree version 4.4.1.0 of 20.03.2009 – Substitutions
within the Iteration operator are allowed and a newly created variable can be
included within an equation, which triggers an iteration without explicitly
writing an iteration operator.
StatFree version 4.4.0.0 of 15.03.2009 – New extended
features for correlation analysis added.
StatFree version 4.3.0.0 of 04.01.2009 – Extensive data
management inclusive data export included
StatFree version 4.2.0.0 of 20.12.2008 – ANOVA - On-Way,
Two-Way, and Two-Way with interaction included
StatFree version 4.1.0.0 of 12.10.2008 – Equation
generator able to process variable names alternatively to the variable numbering.
StatFree version 4.0.3.0 of 03.10.2008 – Graph Editor
(import – formatting – export) integrated.
StatFree version 4.0.2.3 of 02.10.2008 – FFT spectrum
re-normalized to be in accordance with Parseval’s
theorem.
StatFree version 4.0.2.0 of 28.09.2008 – Error Function
– erf(x) – and logarithm of the Gamma Function – lnGam(x)
– added.
StatFree version 4.0.1.0 of 28.08.2008 – Rebuild with an
updated compiler (Windows Vista compatibility).
StatFree version 4.0.0.1 of 27.10.2007 – Same
functionality as of version 3.4.9.0 but does run on Windows Vista as well and
includes an internet update functionality.
StatFree version 3.4.9.0 of 20.03.2007 – Comprehensive
graphics manipulation for 2 and 3D graphs as well as correlation and time
series windows included.
StatFree version 3.4.8.0 of 06.03.2007 – Wavelet
Multiresolution Analysis included.
StatFree version 3.4.7.0 of 01.03.2007 – Residual
analysis for calculating the optimal cutoff frequency for data filtering
included.
StatFree version 3.4.6.0 of 27.02.2007 – Cohen-Daubechies-Feauveau - CDF(m,n) - wavelets
transformations included.
StatFree version 3.4.4.0 of 16.09.2006 – The newly
included functions – Enl(x) and Cut(x) – let you
enlarge and cut a data set for use with FFT and iFFT.
The setting of Case Numbering and Variable Numbering within the two Data
Editors is stored within the StatFree.ini file, so that the chosen options
remain till the next setting.
StatFree version 3.4.3.0 of 27.08.2006 – The newly
included function – Spline(x) – let you approximate missing data (empty fields)
by generating a cubic spline.
StatFree version 3.4.2.0 of 13.08.2006 – Utility to
transpose the data sets included.
StatFree version 3.4.1.0 of 08.08.2006 – Extended
functionality of the “If then” utility.
StatFree version 3.4.0.0 of 23.07.2006 – A new function
to do the inverse Fourier transformation is included as well as a function that
calculates the characteristic of a cyclic motion by evaluating the normalized
amplitudes for the system’s base frequency and its higher harmonics.
StatFree version 3.3.0.0 of 18.05.2006 – A Fourier
transform can be initiated from within any of the two grids. Depending on the
options set additional columns displaying frequency [Hz], real part of the
transform, imaginary part of the transform, absolute of the transform and/or
phase angle are added. Instead of the logistic equation a function calculating
the trend line is included. The logistic equation might be calculated using the
equation generator. The tutorials don’t show up separately since they are
integrated within the help file.
StatFree version 3.2.1.0 of 19.02.2006 – Equation
builder included and a field for equation names to each graphic window. The
equation builder is an additional window that can be opened separately. It can
be zoomed and therefore has the capacity to host huge equations and offers ten
fields for substitutions.
StatFree version 3.2.0.0 of 04.02.2006 – Implementation
of the “If operator”.
StatFree version 3.0.0.0 of 24.11.2005 – Equation
generator and additional graphic options included.
First programming code generated October 2002.
Version numbering scheme:
StatFreeABCD-yyyymmdd
A: Version, B: major upgrade, C: minor upgrade, D:
compilation after bug removal – issued: yyyy: year,
mm: month, dd: day.
For Bug Report send an email to Manfred.Vieten@uni-konstanz.de.
Trouble Shooting
If StatFree opens with an error message and closes
immediately you need to erase the StatFree.ini file in the program
directory (it is located in ...\VietenDynamics\StatFree or in another directory depending on your
settings). Afterward, StatFree opens with the initial settings.
If after a longer
calculation the Add Variable(s) window does not close, save the data, and start the
application newly.
If a whole graphic
screen (2D-graphs or 3D-graphs) appears in one (line) color, switch back the Line Width to a number between 1 and 9.
StatFree
does adjust to your PC's DPI setting (Dot Per
Inch). However, if you experience distortion of the elements of the
various windows change the DPI to 100%. You can adjusted the DPI parameter
within Window's System Control display setting.
Contact:
* University
of Konstanz
* Prof. Dr. Manfred Vieten
* P.O.Box D30
* 78457 Konstanz/Germany
* Phone: +49-7531-88-3565
* E-mail: Manfred.Vieten@uni-konstanz.de
* http://www.uni-konstanz.de/FuF/SportWiss/vieten/Software
The Software of VietenDynamics: StatFree
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Latest changes: Wednesday, 17 August 2015 mv