Release notes

This table provides quick access to what's new in each version.

FSDA follows typical MATLAB timetable in the sense that there are two releases per year. The first typically in May/June and the second around October/November.

Version (Release) New Features and Changes Version Compatibility Considerations Fixed Bugs and Known Problems Release dates
V7.1 (R2019b)

This is the first release which is distributed from Mathworks marketplace and from github platform.

 

TRANSFORMATION IN REGRESSION

New function tBothSides  which enables to transform both sides of a (nonlinear) regression model.

New function boxcoxR which finds MLE of lambda in linear regression (and confidence interval) using Box Cox or Yeo and Johnson family.

ROBUST TIME SERIES ANALYSIS

New functions  LTStsVarSel.m which enables to perform variable selection in the robust time series model LTSts.m. In functions LTSts.m, simulateTS.m and forecastTS.m it is now possible to add an autoreressive component.

UTILITIES

New function existFS which checks whether a file exists and puts the answer in a cached persistent variable

DOCUMENTATION

Added file getting_started.mlx in subfolder doc of the main root of FSDA for packaging the FSDA toolbox,

 

From this release we support old releases up to 2014b. Now functions tclust.m and logmvnpdfFS.m do not need anymore the presence of MEX files. This modification has been made necessary because at present Mathworks toolbox packaging does not support mex files.
Fixed a bug in tclutICplot
New function startup.m has been added to the main folder of FSDA which copies all HTML documentation files in subfolder (FSDA root)/helpfiles/FSDA into (MATLAB docroot/help). The files can be copied in Windows system just if the user has administrator privileges.

October  2019
V7.0 (R2019a)

CLUSTER ANALYSIS

Function tclustreg has been considerably enhanced. Now the function includes: (i) robust BIC, (ii) possibility of constraining the determinants of the covariance matrices of the explanatory variables, (iii) options for treating datasets with concentrated noise, making use of concentration steps appropriately modified using observation weighting and thinning methods.

New function tclustregIC which (if present) uses the Parallel Computing toolbox to compute robust BIC  for mixture and classification likeilhood for different values of k (number of groups) and different values of c (restriction factor for the variances of the residuals), for a prespecified level of trimming.

New function  for constraining the determinants  restrdeter. This function has its own interest but is called in every  concentration step of function tclust in case determinant restriction is needed.

Routines for constraining the determinants (restrdeterGPCM), the shape matrices (restrshapeGPCM) and to impose common rotation matrices (common principal components) in presense of equal shape (cpcE.m) or varying shape (cpcV.m) and a general routine to impose constraints in the family of the 14 Gaussian Parsimonious Clustering Models (restrSigmaGPCM).

Routine to generate data based on the 14 Gaussian Parsimonious Clustering Models (genSigmaGPCM). This routine can be called directly from function MixSim in order to generate each of the 14 Gaussian Parsimonious Clustering Models with a prespecified level of overlap (see option sph inside MixSim).

Routine GowerIndex to compute matrix of similarity indexes using Gower metric.

DATASETS

New datasets added to the collection:

animals, P12119085, P17049075, fondi_large, JohnDraper data, gasoline data, ms212. See pages datasets_reg and datasets_mult for a description of these datasets.

GRAPHICS

Possibility of brushing using rownames. Rownames also appear in the associated scatter plot matrix, both for regression and multivariate analysis: se new examples in resfwdplot and malfwdplot.

New function aceplot to visualize the results of the output produced by functions ace and avas.

Option RowNamesLabels has been added to add2spm and to add2yX to label the units.

MULTIVARITATE

Funciton FSMeda is now much faster; the original function FSMeda has been kept, renamed FSMedaeasy, because the algorithm is much easier to follow.

REGRESSION

New functions: (i) ace which implements the alternating conditional expectations algorithm to find the transformations of y and X that maximise the proportion of variation in y explained by X and (ii) avas which uses a (nonparametric) variance-stabilizing transformation for the response variable.

New function smothr to smooth values imposing variour constraints (e.g. monotonicity, circularity,..). This function calls the supersmoother routine of Friedman.

New function rlssmo to compute a running line smoother with global cross validation.

New function supsmu to smooth scatterplots using Friedman's supersmoother algorithm.

Function RobCov now includes the estimator covrobc (a corrected version of the covariance matrix of  robust beta coefficients). A new motivating example  shows a case why covrobc should be always used.

UTILITIES

New function repDupValWithMean that enable to replace values of y including non unique elements in vector x with local means.

UTILITIES HELP

Function publishFS is fourthly improved. This function automatically transforms structuerd .m files into MATLAB pure style files. In the HTML help files now the right click of the mouse (similarly to pure Mathworks pages) enables to execute, select or find help (F1 key) for all the versions of MATLAB starting from 2017a.

 

STATISTICAL UTITLIES

New function genr8 to generate random numbers which are coherent across different software platforms.

New function exactcdf to find exact cdf values of each element of an input vector x with respect to an empirical distribution.

New function wthin which thins a uni/bi-dimensional dataset.

New function ctsub which computes numerical integrarion from x(1) to z(i) of y=f(x)

New functions (i) vervaatsim (to simulate precisely from a Vervaat perpetuity
distribution)  (ii) vervaarxdf (to obtain the pdf or the cdf of a Vervaat perpetuity distribution) and (iii) vervaatrnd (to simulate random variates from the Vervaat perpetuity distribution).

 

 

This is the last release where we  we support old releases up to 2012a.
Fixed a bug in mtR when the user wanted to continue the simulation using a negative seed

May  2019
V6.1 (R2018b)

(1) New function qqplotFS that enables to create a qqplot of residuals with confidence bands

(2) New function  mtR which generates the same random numbers produced by R software with Mersenne Twister mt19937ar

(3) New functions associated with Rocke biweght estimator. See for example RKrho, RKpsi, RKpsider, RKwei, RKbdp, RKeff.

(4) Routines FSR, FSRmdr, FSRbsb extended to time series (see new functions FSRts, FSRtsmdr, FSRtsbsb and regressts)

(5) New function verlessthanFS.  It is a faster version of MATLAB function verlessthan.

(6) New datasets added to the collection.

(7) New routine publishBibliography to create in a automatic way the bibliography from the citations present inside the .m files.


Fixed a problem in the brushing from spmplot and on the diagonal there are the boxplots.  See for more details the additional examples in yXplot and spmplot.

Improved option for thinning units inside tclustreg

Solved minor bug in FSM when it was called with option 'bonflev'
September  2018
V6.0 (R2018a)

(1) New function tclusteda that helps choosing the best tclust model. It computes tclust for different values of the trimming factor and produces plots that allow to find the optimal level of trimming. This function uses the parallel processing toolbox, if available.

(2) Extension of the score test. New function ScoreYJpn  that computes the score test for Yeo Johnson transformation separately for positive and negative observations. FSRfan now accepts the new option family "YJpn" and it is possible to monitor the score test for both positive and negative observations (output arguments out.Scorep and out.Scoren).

(4) New functions for time series analysis. simulateTS simulates a time series with trend (up to third order), seasonality (constant or of varying amplitude) with a different number of  harmonics and a level shift. forecastTS produces forecasts with confidence bands for a time series estimated with function LTSts.  

(4) CorAna has an improved display of results. New function CorAnaplot draws a rich Correspondence Analysis graph with different types of confidence ellipses for selected rows and columns.

(5) New function verlessthanFS.  It is a faster version of MATLAB function verlessthan.

(6) Documentation of yXplot considerably improved. New options added (xlimx, ylimy, namey, nameX).

(7) MixSimreg extended to account for multiple parameter distribution (betadistrib option)

(8) histFS has a new optional argument (weights) for plotting a weighted histogram.

(9) options labenv has been added to mmdrsplot.

(10) option axesellipse added to ellipse

(11) New output argument idxMapping used in function ClusterRelabel, to track the indexes permutations used to rearch a desired cluster labelling.

From release 2018a we support old releases up to 2012a.

From 2018a the use of subfunctions tinvFS, finvFS, tcdfFS, fpdfFS, fcdfFS which compute inverse, pdf, cdf of the T and F distribution are not supported anymore.

Following the feedback provided by our users, Function UnitsSameCluster (which was introduced in R2017a) has been renamed (for better readability) ClusterRelabel
Fixed a series of problems associated to MATLAB 2018a. For example now empty variables which will contain numbers have been initialized with [], while empty variables which contain characters are initialized with ' '. See for example functions yXplot and spmplot. May  2018
V5.1 (R2017b)

FSDA has introduced two new categories of tools, one for (robust) time series analysis; another for analyzing categorical data and contingency tables. More precisely:

 

(1) Function LTSts  extends LTS estimator to time series. A related new graphical plot associated to a time series, wedgeplot, provides information on the presence of outliers and level shifts.

(2) CorAna performs correspondence analysis; SparseTableTest computes independence test for large and sparse contingency tables; CressieRead computes the power divergence family of tests, to check the discrepancy/distance between observed and expected frequencies in a contingency table; rcontFS generates a random two-way table with given marginal totals; barnardtest computes the Barnard test,  corrNominal measures strength of association between two unordered (nominal) categorical variables. Similarly for ordinal data with corrOrdinal. crosstab2datamatrix recreates the original data matrix X from contingency table N. This group of functions is complemented by file examples_categorical.m as in style of FSDA.

 

The two categories of functions will be progressively enriched.

 

Other new functions which are included are boxtest (test of equality of covariance matrices used for example in tkmeans), GYfilt (Gervini and Yohai, univariate outlier identifier), mmdrsplot (interactive plot of the trajectories of minimum Mahalanobis distances from different starting points), overlapmap to plot the ordered pairwise overlap values between components, dempk to perform a merging of components found by tkmeans, ncpci to compute a non centrality parameter confidence interval. 

Finally, spmplot has been enriched to superimpose ellipses, density and contour functions to data and extract single panels from the scatter matrix.

  Various inconsistencies in the browsing of the documentation pages and the bibliography have been fixed. November 2017
V5.0 (R2017a) CLUSTERING
Function tclustreg now includes trimmed Cluster Weighted Restricted Models.

New function tclustIC for the automatic selection of the best number of groups.

New function tlclustICsol to extract a set of relevant solutions (and associated tclustICplot).

New function UnitsSameCluster to to control the labels of the clusters which contain predefined units.

New function to compare two partitions (Fowlkes and Mallows index)

Updated routine simdatasetreg to generate new outlier patterns

STATISTICAL UTILITIES

New routines for density estimation and thinning, for univariate and bivariate data (used in tclustreg).

bwe, rthin, wthin, WNChygepdf

UTILITIES
New functions wraptextFS, removeextraspacesLF

MONITORING ROBUST ESTIMATORS
New functions mveeda, MMmulteda
Smulteda, Sregeda

TRANSFORMATIONS IN REGRESSION
 New function ScoreYJ which implements the score test for the Yeo and Johnson transformation. This new transformation has also been embedded inside function FSRfan.

SAMPLING AND COMBINATORIAL updated function randsampleFS and subsets.


NEW mlx files
.mlx files introduced for examples_MixSim

GRAPHICS
New function to create the car-bike plot to find the most relevant solutions.

Functions resfwdplot, malfwdplot generalized in order to take as input the output of procedures which monitor robust estimators.

  Control version added in many graphical routines to take account the modifications in MATLAB 2017a

From MATLAB R2012a callback functions started to use new internal data structures. Interactive plots that use such callbacks (e.g. those in GUI brushRES) may produce errors in releases older than R2012a. The issue should be now fixed. Please report to us any problem you may experience.

May 2017
V4.1 (R2016b) New functions for  bivariate density estimation and random thinning (kdebiv.m, rthin.m) used to extend tclustreg.m features.

The FSDA help folder now contains XML files associated to the functions documentation. This is in view of generating/updating automatically or using a GUI the functions documentation, in html as well as in the function head.

New html documentation generated with publishFS.
We are monitoring  possible compatibility issues that may emerge from  changes in the tagging policy of the graphical objects in MATLAB.
add2spm modified to take into account a change in the property name of the legend object introduced in MATLAB R2016b
(LegendPeerHandle is now called LayoutPeers).

A change in MATLAB R2016b  function legend.m was affecting FSDA function add2yX (the legend was plotted twice). Bug fixed.

Bug affecting FSMeda only in the univariate case fixed.
October 2016
V4.0 (R2016a) Major release.

New function, publishFS, introduced to generate documentation pages directly from the .m files.

New function, makecontentsfileFS, introduced to create a the list of files present in a FSDA folder and/or subfolders. It extends MATLAB function makecontentfilesFS.

.mlx files introduced for examples_multivariate and examples_regression.

New features added to the tclust function, including determinant restriction and new adjusted BIC criterion for the estimation of the number of groups.

Added functions for reweighting FSR and FSRB (FSRr and FSRBr).

Functions FSR, FSRB and FSRH redesigned; a routing implementing the core of the Forward Search algorithm (FSRcore) introduced to avoid code redundancies.

New function, winsor, to winsor data.

New function FSMbsb, which will replace FSMbbm.

New function randindexFS, to evaluate the quality of different clusterings.

New routines poolClose and poolPrepare introduced to conveniently open and close a pool of parallel workers.

Several new robust functions to generate, for example, the Tukey Biweigh rho function (HUrho),  the tuning constant associated to a certain efficiency (HUeff), the psi functions (HUpsi), its derivative (HUpsider), etc. For a full list, see functions under utilities_stats folder.


Documentation made compatible with the new MATLAB help navigation and browser-style, which was redesigned in release R2015b.


Many small bugs fixed. Functions affected include tclust, tclustReg, position, MixSimReg.

ClickableMultiLegend made compatible with R2016a.

drawnow command introduced in several graphical functions, to solve episodic bugs in the generation of the plots.

May 2016

V3.1 (R2015b)

Major release.

Function simdataset.m modified to allow the user to simulate outliers from different distributions and contamination schemes and/or contaminate existing datasets.

New Bayesian regression analysis routines: FSRB.m, FSRBeda.m, FSRBmdr.m, regressB.m.

In FSReda.m: monitoring of confidence intervals of beta and sigma2.

In FSRBeda.m: monitoring of HPD (highest posterior density regions) of beta and sigma2.

New functions for inverse gamma computation: inversegampdf.m, inversegamcdf.m, inversegaminv.m.

Added functions to monitor units forming subset in heterosckedastic and Bayesian regression: FSRHbsb.m, FSRBbsb.m.

Added new datasets for Bayesian examples.

FSMtra.m: added option for the robust transformation in the Yeo-Johnson family.

addFSDA2path.m: modified for compatibility with unix platforms and to address changes in the folder organization of FSDA functions.

Added routines to compute and visualize robust bivariate boxplot (function boxplotb.m)

New routine for automatic outlier detection in heteroskdastic regression (FSRH.m)


In function spmplot, the multiple histograms (boxplots) on the main diagonal of the scatter plot matrix is now working also with R2015a and R2015b.

The html documentation pages of some new functions are missing. As a consequence, some links may be broken. New complete documentation, produced automatically from the documentation in the head of our m-files, will be released soon.

September 2015

V3.0 (R2015a)

Major release.

Added robust regression (tau) and multivariate estimators (Stahel-Donoho). Functions taureg.m and SDest.m. New weight functions (hyperbolic, Hampel and optimal).
New routine for robust Bayesian regression (i.e. FSRBmdr).
New routine for robust heteroskedastic regression (i.e. FSRHmdr).
Added cluster analysis routines (tclust, tkmeans, MixSim), with related example datasets. New exploratory tools for fininding the number of groups based on random start monitoring of minimum deletion residual (fsrmdrRS.m, first FSDA function which exploits the parallel processing toolbox, if present).
New routines for connecting MATLAB with R.
New function to obtain proper threshold for robust estimators in order to have an empirical size equal to the nominal (function RobRegrSize.m).
Added univariate robust scale estimators Qn and Sn (functions Qn.m and Sn.m).
New utilities to extract elements above diagonal in a vector (function triu2vec.m) and to position figures (function upperfracpos.m).
New function to compute the cdf of the linear combination of non central chi-squared random variables (ncx2mixtcdf).

Documentation made compatible with the new help system introduced with MATLAB R2015a

In function spmplot, the multiple histograms (boxplots) on the main diagonal of the scatter plot matrix do not work with R2015a because of recent changes in gplotmatrix.

February 2015

 

V2.1 (R2013a)

New very fast implementation of the Forward Search for multivariate analysis (FSMmmd). Forward Search in regression modified to deal with the cases in which in a particular step of the search subset is not full rank (FSR and FSRmdr). New scatter plot matrix with multiple groups and multiple boxplots on the main diagonal (spmplot).

Structure modified for compatibility with MATLAB R2012b to R2013a releases. Three APPs introduced in release R2013a.


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May 2013

 

V2.0 (R2011b)

Major release. Traditional robust estimators added including S, MM, MCD, MVE, (Sreg, Smult, MMreg, MMmult, mcd, mve) and univariate and bivariate analysis (unibiv). New interactive plots and interactive graphics features.

Redesigned the definition of many optional input parameters in terms of structures


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September 2011

 

V1.1 (R2010b)

Multivariate data analysis routines have been added. Function resfwdplot considerably improved.


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September 2010

 

V1.0 (R2010a)

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A few functions use ~ to denote unused output parameters as from release 2009b


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February 2010