Release History

The table below lists the improvements and bug fixes of the last DataLab versions. The latest release can be loaded from the download page.
 

Release 3.000 [2011-Dec-11]

Neue Features partial least squares (PLS) regression model data imputation techniques Improvements user interface has been adjusted to comply with Windows 7 DataLab now fully supports the Windows multiple document interface MLR windows additionally displays regression coefficients as a graph Fourier transform improved Wilcoxon signed rank test for paired samples implemented ANOVA now performs Levene's test in parallel the data editor now accepts both integer ordinals and categorial identifiers for categorial variables the data editor now supports inserting and deleting rows and columns the clustering window uses new dendrogram layout and provides an improved user interface the script commands "CloseAllCharts", "ScaleCols", "ScaleRows" and "Sort" the script command Chart[x].KindOfDisp supports now probability plots and cumulative distributions the math formula interpreter is now capable of calculating the sum, the mean, and the variancew update engine improved, automatic checking for updates implemented correlation function is now calculated for both positive and negative shifts matrix view now indicates single empty cells even in very large data matrices user interface and calculation speed of variable selection improved PCA and PCR user interface stream-lined PCR now calculates regression coefficients to original data, as well explanation part in test protocols improved variable selection with MLR does no longer include VIFs if there are more variables than objects 3D surface plot extended and improved various minor improvements and adjustments Bug Fixes MLR: t-value of intercept was always 0.0 KS-Test: KS-value was slightly off under certain circumstances selection field of univariate statistics dialog did not adapt to changes of the variable identifiers PCA component selection in one plot produced side effects in other PCA plots curve fitting does no longer crash with very small or very large numbers (< 1e-100 or > 1e100) sign of t-value of matched pairs test is now displayed correctly missing translation of 3D surface plot fixed

Release 2.700 [2010-Mar-09]

New Features multi-document interface (MDI) for most windows implemented PCA and PCR support now the selection of variables PCA now creates bi-plots as well plots of ordinal and nominal variables may be blurred to see how many points are on top of each other univ. regression: Hoerl function implemented symbol assignment to classes implemented Improvements user interface of univariate descriptors, simple linear regression, MLR, PCA, PCR and cluster analysis improved command "clear clipboard" implemented plot window now offers additional buttons data can be marked and deleted in univariate regression dialog univariate regression: cursor now snaps to objects and displays coordinates and object name univ. regression: residuals can be copied to matrix clipboard univ. regression: Durbin-Watson test statistic is now calculated matrix viewer can now be minimized math formulas can now be applied to marked data (keyword MARKED) dialog window for marking data replaced by numerical editor script editor and comment editor are now separate editors filter command now fills column/row headings with info about filter, starting and ending cells are marked as empty the command "digitize" now writes calibration data into the comment of the data matrix multiple regression: cursor now snaps to objects in residual plots and displays coordinates and object name OK and Cancel buttons are no longer redundant on various forms Bug Fixes script command "initialize" did not clear the comment field loading big ASC files does not take eons any more stepwise regression does no longer crash when the number of selected variables approaches the number of objects fixes of several minor bugs old PCA info box displayed wrong PCA scores (although they were calculated correctly in all other parts of DataLab) copy marked rows to matrix clipboard now works as expected residuals in univariate regression window showed wrong sign captions of regression and residual chart are now correct ANOVA of reciprocal function in univariate regression is now correct matrix viewer window now accepts auto-advance when entering column names communication between plot and regression windows improved

Release < 2.700

Release history of versions before release 2.700 has been deleted for brevity