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http://www.aptech.com/gauss17-preview/
What's New in GAUSS 17?
Aptech > What's New in GAUSS 17?
Improved Data Handling
Feature plot of wine chemistry variables
Option to specify models and data in terms of model variables:
//Load specified variables in a GAUSS matrix:
X = loadd("wine_quality.dat", "rating + citric acid + sulphates");
//Estimate parameters of model:
//rating = α + β1*citric acid + β2*sulphates
call ols("wine_quality.dat", "rating ~ citric acid + sulphates");
//Calculate descriptive statistics on all
//variables in dataset except for 'fixed acidity' and 'chlorides'
call dstatmt("wine_quality.dat", ". -fixed acidity -chlorides");
Simple to use
Consistent with other statistical packages
Well documented
Backwards compatible
Compute and estimate CSV, XLSX and HDF5 data directly
Intelligent file handling allows you to use many different file types as data sources for GAUSS procedures:
//Load specified variables from a CSV file to a GAUSS matrix:
X = loadd("wine_quality.csv", "rating + citric acid + sulphates");
//Estimate parameters of model:
//rating = α + β1*citric acid + β2*sulphates,
//using data from an Excel file
call ols("wine_quality.xlsx", "rating ~ citric acid + sulphates");
//Calculate descriptive statistics on all variables
//in an Excel file except for 'fixed acidity' and 'chlorides'
call dstatmt("wine_quality.xlsx", ". -fixed acidity -chlorides");
Support for HDF5 datasets provides:
Unlimited dataset size
Fast data read and write
Supported as native GAUSS file type
Portable to all operating systems and many software packages
New Graphics Functionality
Plot of 95% confidence interval for normal distribution.
Logistic probability density
Plot of Google stock price with exponential moving average
Support for LaTeX in titles, legends, axis labels and text boxes
//Add LaTeX formula to title
plotSetTitle(&myPlot, "\\Delta y = y_t - y_{t-1}");
Empirical Distribution Plot
Surface plot with plane
Plot of credit limits by age group with error bars
Plot of lasso tune by MSE
New functions:
plotAddErrorBar: Create XY plots with user specified symmetrical or asymmetrical error bars
plotAddSurface: Adds a surface or plane to an existing surface plot
plotSetLegendFont: Controls the font family, size and color of the text in the legend
plotCDFEmpirical: Plots the empirical distribution function of an input vector or vectors
Surface plot
Surface plot with viridis color map
Contour plot
Contour plot with 2 peaks
Function enhancements:
New color maps for surface and contour plots make it easy to create professional and attractive 3-D graphics
Added option to place height on contour lines in plotContour
Added option to place colors at specific heights, rather than splitting the colors evenly for surface and contour plots
The terminal version of GAUSS, ‘tgauss’, and the GAUSS Engine can now create and save graphs on headless servers
Graphics Editor now allows interactive control of:
View angle, lighting and toggle the mesh in surface graphs
Extent of range of X and Y axes
New Mathematical and Statistical Functionality
LDL matrix factorization
New functions:
cdfEmpirical: Computes the empirical cumulative distribution function
ldl: Computes and returns the ‘L’ and ‘D’ factors from a symmetric matrix
powerm: Raises a matrix to a specified power
sylvester: Calculates the solution to the Sylvester matrix equation
rndWishartInv: Takes draws from the Inverse Wishart distribution
pdfWishartInv: Computes the probability density function of the inverse Wishart distribution
dot: Computes the dot product for a vector or group of vectors
Function Speedups
X’X for large matrices is nearly twice as fast
sortc is much faster, especially for column vectors
Greatly improved speed of unique and uniquesa, especially when operating on string arrays
Linear solve, using the slash-operator ‘/’ for small matrices
Kronecker product ‘.*.’ is faster when one of the inputs is a column vector
crossprd is faster for case of fewer than 500 vectors
cdffc is 10-1000x faster when ‘d1’ parameter is equal to one
reclassify is much faster and uses less memory
Other Enhancements
Function enhancements:
quantile/quantiled: Added option to specify the calculation method
glm: Added support for inverse Gaussian family and models without intercepts when estimating the parameters of the General Linear Model
schur: Added support for immediate return of complex form
Improved tree view of data on the Data Page
getorders and getdims now support matrices, strings and string arrays
strsplit now supports multi-character delimiters
New function strtrim removes white-space from the left and right side of a string or each element of a string array
Bug fixes and more…
GAUSS HPCC
GAUSS HPCC (High Performance Cluster Computing) boosts the computing power of GAUSS, harnessing the capabilities of high speed cluster machines, for incredible speed and performance.
Built-in, efficient cluster computing support:
Create high-level GAUSS programs that use the fast, low-level MPI library
A version of GAUSS HPCC will be made available to Universities who own a Floating Network license with current Platinum Premier Support & Maintenance at no extra charge
Builds on these features included in the standard version of GAUSS 17:
Compatible with Hadoop:
- Easily create GAUSS mapper and reducer functions
Connect to NoSQL and Big Data databases such as:
- MongoDB, Hbase, Hive, Pig and more
Support for streaming or online algorithms for data that does not fit entirely in memory.
Quick instantiation with a small memory footprint allows for high performance across the cluster
Recent Upgrades of GAUSS
If you are upgrading from earlier versions of GAUSS, GAUSS 17 allows users to enjoy many years worth of program advances and new features such as those included in recent releases of GAUSS:
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