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Statistics Toolbox™ Release
Notes

Summary of Contents

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    Statistics Toolbox™ Release Notes...

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    Program and Documentation, unused, to The MathWorks, Inc. Trademarks MATLAB and Simulink are registered trademarks of The MathWorks, Inc. See for a list of additional trademarks. Other product or brand www.mathworks.com/trademarks names may be trademarks or registered trademarks of their respective holders.

  • Page 3: Table Of Contents

    Contents ....... Summary by Version ..Version 7.3 (R2010a) Statistics Toolbox Software .

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    Contents...

  • Page 5: Summary By Version

    Statistics Toolbox™ Release Notes Summary by Version This table provides quick access to what’s new in each version. For clarification, see “Using Release Notes” on page 2. New Features Version Version Fixed Bugs Related and Changes (Release) Compatibility and Known Documentation Considerations Problems...

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    Use release notes when upgrading to a newer version to learn about: • New features • Changes • Potential impact on your existing files and practices Review the release notes for other MathWorks™ products required for this product (for example, MATLAB ® or Simulink ® ). Determine if enhancements, bugs, or compatibility considerations in other products impact you.

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    Summary by Version time and as more information becomes available. Bug Reports include provisions for any known workarounds or file replacements. Information is available for bugs existing in or fixed in Release 14SP2 or later. Information is not available for all bugs in earlier releases. Access Bug Reports using your MathWorks Account.

  • Page 8: Version 7.3 (r2010a) Statistics Toolbox Software

    Statistics Toolbox™ Release Notes Version 7.3 (R2010a) Statistics Toolbox Software This table summarizes what’s new in Version 7.3 (R2010a): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Bug Reports Printable Release Details below Includes fixes Notes: PDF...

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    Version 7.3 (R2010a) Statistics Toolbox™ Software Observation Weights Options in Resampling Functions New options to weight resampling probabilities broadens the range of models supported by , and functions. bootstrp bootci perfcurve...

  • Page 10: Version 7.2 (r2009b) Statistics Toolbox Software

    Statistics Toolbox™ Release Notes Version 7.2 (R2009b) Statistics Toolbox Software This table summarizes what’s new in Version 7.2 (R2009b): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Bug Reports Details below Includes fixes New features and changes introduced in this version are: •...

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    Version 7.2 (R2009b) Statistics Toolbox™ Software New Stack and Unstack Methods for Dataset Arrays converts a “tall” dataset array to an equivalent dataset dataset.unstack array that is in "wide format", by "unstacking" a single variable in the tall dataset array into multiple variables in wide. reverses this dataset.stack manipulation by converting a “wide”...

  • Page 12: Version 7.1 (r2009a) Statistics Toolbox Software

    Statistics Toolbox™ Release Notes Version 7.1 (R2009a) Statistics Toolbox Software This table summarizes what’s new in Version 7.1 (R2009a): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Bug Reports Details below Includes fixes New features and changes introduced in this version are: •...

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    Version 7.1 (R2009a) Statistics Toolbox™ Software now supports an optional parameter for specifying missing key join behavior rather than raising an error. • An enhanced method now supports exporting directly dataset.export to Microsoft Excel ® files. ® New Naïve Bayes Classification •...

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    Statistics Toolbox™ Release Notes • Includes kernel object properties and parametric object properties that you can access to determine the fit results and evaluate their accuracy. • Related enhancements in the , and chi2gof histfit kstest probplot functions. qqplot...

  • Page 15: Version 7.0 (r2008b) Statistics Toolbox Software

    Version 7.0 (R2008b) Statistics Toolbox™ Software Version 7.0 (R2008b) Statistics Toolbox Software This table summarizes what’s new in Version 7.0 (R2008b): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Details below Summary New features and changes introduced in this version are organized by these topics:...

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    Statistics Toolbox™ Release Notes Compatibility Considerations In previous versions, used to evaluate strings in external text dataset eval files before writing them into a dataset array. As a result, strings such as were treated as numerical expressions with two divides. Now, '1/1/2008' treats such expressions as strings, and writes a string variable into dataset...

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    Version 7.0 (R2008b) Statistics Toolbox™ Software The folding procedure is applied not just when the parameter 'function' , but for all values. 'pdf' 'function' Regression Analysis The new function fits nonlinear mixed-effects models to data nlmefit with both fixed and random sources of variation. Mixed-effects models are commonly used with data over multiple groups, where measurements are correlated within groups but independent between groups.

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    Statistics Toolbox™ Release Notes Compatibility Considerations Changes to have altered a number of default behaviors: boxplot • Box labels are now drawn as text objects rather than tick labels. Any code that customizes the box labels by changing tick marks should now set the tick locations as well as the tick labels.

  • Page 19: Version 6.2 (r2008a) Statistics Toolbox Software

    Version 6.2 (R2008a) Statistics Toolbox™ Software Version 6.2 (R2008a) Statistics Toolbox Software This table summarizes what’s new in Version 6.2 (R2008a): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Bug Reports Details below Summary Includes fixes...

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    Statistics Toolbox™ Release Notes Model Assessment Two new cross-validation functions, , partition cvpartition crossval data and assess models in regression, classification, and clustering applications. Multivariate Methods A new sequential feature selection function, , selects predictor sequentialfs subsets that optimize user-defined prediction criteria. The new function performs nonnegative matrix factorization (NMF) for nnmf...

  • Page 21: Version 6.1 (r2007b) Statistics Toolbox Software

    Version 6.1 (R2007b) Statistics Toolbox™ Software Version 6.1 (R2007b) Statistics Toolbox Software This table summarizes what’s new in Version 6.1 (R2007b): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Bug Reports Details below Summary Includes fixes...

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    Statistics Toolbox™ Release Notes — Cluster posterior probabilities • posterior — Mahalanobis distance • mahal function for hierarchical clustering now accepts a vector of cluster cutoff values, and returns a matrix of cluster assignments, with one column per cutoff value. Compatibility Considerations function now returns a vector of cluster indices of length n, where kmeans...

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    Version 6.1 (R2007b) Statistics Toolbox™ Software A number of probability functions now have improved accuracy, especially for extreme parameter values. The functions are: — More accurate for probabilities in near 1. • betainv — More efficient and less likely to run out of memory for large •...

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    Statistics Toolbox™ Release Notes Compatibility Considerations In previous releases the function, when using the mvregress 'cwls' algorithm, estimated the covariance of coefficients using the estimated, COVB rather than the initial, covariance of the responses . The initial SIGMA SIGMA now used, and differs to a degree dependent on the difference between COVB the initial and final estimates of...

  • Page 25: Version 6.0 (r2007a) Statistics Toolbox Software

    Version 6.0 (R2007a) Statistics Toolbox™ Software Version 6.0 (R2007a) Statistics Toolbox Software This table summarizes what’s new in Version 6.0 (R2007a): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Bug Reports Details below Summary Includes fixes...

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    Statistics Toolbox™ Release Notes Hypothesis Testing Expanded options are available for linear hypothesis testing. • The new function performs linear hypothesis tests on linhyptest parameters such as regression coefficients. These tests have the form H*b = for specified values of , where is a vector of unknown parameters.

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    Version 6.0 (R2007a) Statistics Toolbox™ Software • The function converts a data sample to a object. paretotails paretotails The objects are useful for generating random samples from a distribution similar to the data, but with tail behavior that is less discrete than the empirical distribution.

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    Statistics Toolbox™ Release Notes predictors , rather than index into as a structure array as it did in the past. As a result, cell arrays should now be used to aggregate objects. classregtree Statistical Visualization The new function produces a scatterplot of 2D data and scatterhist illustrates the marginal distributions of the variables by drawing histograms along the two axes.

  • Page 29: Version 5.3 (r2006b) Statistics Toolbox Software

    Version 5.3 (R2006b) Statistics Toolbox™ Software Version 5.3 (R2006b) Statistics Toolbox Software This table summarizes what’s new in Version 5.3 (R2006b): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Bug Reports Details below Summary Includes fixes...

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    Statistics Toolbox™ Release Notes Hypothesis Tests The following functions for hypothesis testing have been added or improved: — Replaces the chi-square approximation of the test statistic, • jbtest which is asymptotic, with a more accurate algorithm that interpolates p-values from a table of quantiles. A new option allows you to run Monte Carlo simulations to compute p-values outside of the table.

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    Version 5.3 (R2006b) Statistics Toolbox™ Software — Multinomial random number generator • mnrnd Regression Analysis Multinomial Regression Support has been added for multinomial regression modeling of discrete multi-category response data, including multinomial logistic regression. The following new functions supplement the regression models in glmfit by providing for a wider range of response values: glmval...

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    Statistics Toolbox™ Release Notes — Performs a gage repeatability and reproducibility study on • gagerr measurements grouped by operator and part Compatibility Considerations function subsumes the function that appeared capability capable in previous versions of Statistics Toolbox software, and the controlchart function subsumes the functions , and...

  • Page 33: Version 5.2 (r2006a) Statistics Toolbox Software

    Version 5.2 (R2006a) Statistics Toolbox™ Software Version 5.2 (R2006a) Statistics Toolbox Software This table summarizes what’s new in Version 5.2 (R2006a): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Bug Reports Details below Includes fixes New features and changes introduced in this version are organized by these...

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    Statistics Toolbox™ Release Notes — Draws jackknife samples from a data set and computes • jackknife statistics on each sample Demos The following demos have been added to the toolbox: • Bayesian Analysis for a Logistic Regression Model • Time Series Regression of Airline Passenger Data The following demo has been updated to demonstrate new features: •...

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    Version 5.2 (R2006a) Statistics Toolbox™ Software Multivariate Distributions Two new functions have been added to compute multivariate cdfs. These supplement existing functions for pdfs and random number generators for the same distributions. — Cumulative distribution function for the multivariate normal •...

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    Statistics Toolbox™ Release Notes Pearson and Johnson Systems of Distributions Support has been added for random number generation from Pearson and Johnson systems of distributions. — Random numbers from a distribution in the Pearson system • pearsrnd — Random numbers from a distribution in the Johnson system •...

  • Page 37: Version 5.1 (r14sp3) Statistics Toolbox Software

    Version 5.1 (R14SP3) Statistics Toolbox™ Software Version 5.1 (R14SP3) Statistics Toolbox Software This table summarizes what’s new in Version 5.1 (R14SP3): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Details below New features and changes introduced in this version are organized by these topics: •...

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    Statistics Toolbox™ Release Notes Descriptive Statistics The new function computes the correlation of one set of partialcorr variables while controlling for a second set of variables. function now computes a wider variety of descriptive statistics grpstats for grouped data. Choices include the mean, standard error of the mean, number of elements, group name, standard deviation, variance, confidence interval for the mean, and confidence interval for new observations.

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    Version 5.1 (R14SP3) Statistics Toolbox™ Software Tests of Randomness The new function tests if a sequence of values comes in random runstest order, against the alternative that the ordering is not random. Probability Distributions Support has been added for two new distributions: •...

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    Statistics Toolbox™ Release Notes — Inverse cumulative distribution function • gpinv — Negative log-likelihood function • gplike — Probability density function • gppdf — Random number generator • gprnd — Distribution statistics • gpstat Regression Analysis • The new function fits Cox’s proportional hazards regression coxphfit model to data.

  • Page 41: Version 5.0.2 (r14sp2) Statistics Toolbox Software

    Version 5.0.2 (R14SP2) Statistics Toolbox™ Software Version 5.0.2 (R14SP2) Statistics Toolbox Software This table summarizes what’s new in Version 5.0.2 (R14SP2): Version New Features and Fixed Bugs and Related Changes Compatibility Known Problems Documentation at Considerations Web Site Bug Reports Details below Includes fixes New features and changes introduced in this version are organized by this...

  • Page 42: Software

    Statistics Toolbox™ Release Notes Compatibility Summary for Statistics Toolbox Software This table summarizes new features and changes that might cause incompatibilities when you upgrade from an earlier version, or when you use files on multiple versions. Details are provided in the description of the new feature or change.

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    Compatibility Summary for Statistics Toolbox™ Software Version (Release) New Features and Changes with Version Compatibility Impact V6.1 (R2007b) See the Compatibility Considerations subheading for each of these new features and changes: • “Cluster Analysis” on page 17 • “Hypothesis Tests” on page 18 •...

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