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DataLab Changelog

What's new in DataLab 4.000

Feb 8, 2021
  • New Features:
  • DLabPascal now provides an integrated debugger
  • several extensions of the built-in DLabPascal library
  • signal integration tool
  • a tool for calculating binary classifier metrics
  • new statistical test: median test
  • Improvements and Changes:
  • Wilcoxon test report now displays the median of the differences as well
  • redesigned random forest form
  • a variable set repository makes the selection of variables much more convenient
  • the RF applicator has now an option to create binary results for classifiers
  • the PLS Applicator now shows the CF thresholds and allows to store the results in the aux. maxtrix or append it to the data matrix
  • the data editor now supports ^C and ^V for copy and paste (instead of 'extract from clipboard')
  • refurbished k-means clustering
  • RBF network extended
  • PLS/DA now displays more classifier metrics (same as MBL)
  • numerical editor: row names are now displayed using a much longer maximal length; two additional fonts (Tahoma, Verdana) included
  • MLR and Ridge Regression diagrams provide now more plot options
  • memory based learner improved in many details
  • refurbished Kohonen map
  • improved edit/selection mode in data description window
  • additional performance metrics for RF classifiers
  • formula editor now uses the ° symbol as cell reference
  • class color setup dialog now supports saving and loading color palettes
  • the default class color palette has been improved

New in DataLab 3.530 (Nov 28, 2013)

  • New Features:
  • ridge regression implemented
  • import/export of data in XML fomat
  • Improvements and Changes:
  • update server reconfigured (user have to install from scratch)
  • new option to prevent the multiple drawing of symbols on top of each other
  • a few minor cosmetic improvements
  • MLR model offers now more options to store the results
  • the variable selection dialog allows now multiple selections
  • script engine extended to support ridge regression
  • the calculation of correlation functions can now be aborted
  • box plots may be displayed now directly from the main menu
  • the statistical tests now support addtional commands to exchange red and blue markings
  • Bug Fixes:
  • cross validation of PLS models with more than 15 target variables resulted in range error
  • correlation function: reentrancy problems fixed
  • Spearman's rank correlation delivered wrong results for large data sets (>50000 values)
  • univariate descriptors showed floating point error on empty data matrix
  • F-Test: incorrect degrees of freedom were calculated if the variance of the blue group was larger than the variance of the red group
  • reg. license was not recognized correctly in some special cases
  • "Revert" command did not revert the comment displayed in the matrix viewer

New in DataLab 3.511 (Mar 16, 2013)

  • the link into the help page of the 2D data designer was invalid
  • the symbol table did no show any symbols

New in DataLab 3.510 (Mar 15, 2013)

  • New Features:
  • 2D dataset designer
  • the data filtering now includes a moving median filter
  • range of axes can now be copied from one plot to another by drag&drop
  • Improvements and Changes:
  • displaying speed of charts with a huge number of data points (as symbols) is increased by a factor of 10
  • import of CSV data provides now a progress feedback
  • speed of loading data files improved
  • a warning is displayed if the user opens an IDT file which is newer than the current version of DataLab
  • serialisation of data matrices now includes the column and row index of the original data
  • 3D surface plot offers now two types of interpolation
  • MLR of large data sets is now much faster
  • Bug fixes:
  • various minor bug fixes
  • plot window displayed error message if one of the variables of a bivariate plot was empty
  • new windows are now positioned correctly in a multi-monitor environment
  • text import filter: overreading intial lines now works even if trigger is empty

New in DataLab 3.507 (Jan 15, 2013)

  • Improvements and Changes:
  • PCR window provides now a context menu for the various charts
  • speed of cross correlation function increased
  • the calculation of filtered data can now be restricted to a particular range of the data matrix
  • Bug Fixes:
  • rowwise filtering of data did not write the results back to source matrix
  • various minor bug fixes

New in DataLab 3.506 (Jan 7, 2013)

  • New Features:
  • DataLab provides now a simple way to extract data from text files
  • Pareto Charts
  • Improvements and Changes:
  • the dialog for selecting the working directory has been improved
  • double-clicking the data plot switches to a list of the most important statistical parameters
  • XLS import routine now recognizes categorial columns automatically and allows to specify date/time format for headings
  • text file extraction improved (mostly cosmetic improvements)
  • image digitization provides now a button to paste an image from the Windows clipboard
  • results of the filter process can now be stored in the matrix clipboard, as well
  • data imputation can now be applied row-wise, as well
  • plot window now offers an option to display date/time coordinates
  • DataLab now supports the direct import of both Excel XLS and XLSX files
  • MS Sans Serif is replaced by Arial font throughout the program to get more space for labels etc.
  • data editor now offers three additional button to scroll the spreadsheet
  • various cosmetic changes
  • the matrix clipboard can now hold up to nine auxiliary matrices (copy of the original + 8 user defined)
  • the original data matrix is now automatically stored in matrix clipboard upon load from disk
  • the work matrix can now be selected from the matrix clipboard
  • data editor now displays the range and number of selected cells
  • random number generator: user defined profiles can now be saved to disk
  • PLS-DA: classification results now display various performance indicators
  • PLS-DA now provides cross validated true-positive- and false-positive rates
  • DataLab blog is now integrated into support menu
  • heading generator now generates month and day names using the DataLab language setting (and not the locale)
  • line and spectral plots now provide the option to indicate the data points
  • the dendrogram can now be displayed as numerical table and in Newick format
  • the help file now offers links to the corresponding pages of the DataLab-Blog (German only)
  • many small, mostly cosmetic changes
  • filter command can now be applied to several columns or rows and offers additional features (smoothed second derivative acc. to Savitzky-Golay, selection of storage mode)
  • script interpreter supports two additional commands ('filtercoeffs' and 'filter')
  • the speed of PLS discriminant analysis with very large data matrices has been increased by 20 to 50%
  • both the variable and the object selector support now the selection of data at regular intervals
  • PLS indicates the progress of a time-consuming calculation in a progress bar
  • help improved
  • Bug Fixes:
  • a missing working directory does not result in a program crash any more
  • cluster analysis crashed if the matrix size has been changed while dendrogram window was open
  • the distances of Ward's method of cluster analysis are now calculated correctly
  • Durbin-Watson test in univariate Regression is now correctly applied (problem with unsorted data)
  • percentiles for vary small samples are now calculated correctly
  • empty cells were set non-empty when copying from the matrix clipboard to the main matrix
  • dendrogram now displays class colors after opening the cluster window
  • communication between data editor and data imputation window did work as expected
  • the final columns were not processed correctly when filtering the data rowwise
  • the level of measurement has been processed incorrectly when deleting marked columns
  • memory overflow fixed (occurred when displaying boxplots of marked data of huge matrices)
  • Durbin-Watson test in univariate Regression is now correctly applied (problem with unsorted data)
  • script commands "markdata" and "unmarkdata" did not process parameter list correctly
  • univariate regression: object indicator now displays correct row name for marked data, as well
  • nominal identifiers are now correctly reset when reading IDT files
  • aborting the update process now provides appropriate feedback
  • marking the data in the test window did not affect the main data matrix
  • refresh of class symbols did not work when assigning different class symbols or class numbers
  • a few minor cosmetic bug fixes
  • import from XLS file: comment is now correctly initialized
  • the logarithmic display of the FFT plot generated a floating point error
  • the background of main window is now drawn correctly even if DataLab spans several screens
  • invoking the correlation function or a statistical test via a script now correctly translates these windows
  • several translation errors in the German version fixed
  • the update dialog created a weird error message if a proxy between the user system and the update server required an authentication
  • changing the option "Use full precision when copying to clipboard" did not have any effect as long as the numeric data editor was open
  • control to set the filter size did now work properly
  • missing refresh message to the other windows after executing a script
  • matrix viewer did not refresh its image when empty state of cells changed
  • histogram of a column/row displayed a prompt to mark the data if the corresponding column/row was empty
  • normal probability plot raised an exception if the number of select data was too low

New in DataLab 3.505 (Dec 18, 2012)

  • Improvements and Changes:
  • double-clicking the data plot switches to a list of the most important statistical parameters
  • XLS import routine now recognizes categorial columns automatically and allows to specify date/time format for headings
  • text file extraction improved (mostly cosmetic improvements)
  • image digitization provides now a button to paste an image from the Windows clipboard
  • results of the filter process can now be stored in the matrix clipboard, as well
  • Bug Fixes:
  • Durbin-Watson test in univariate Regression is now correctly applied (problem with unsorted data)
  • percentiles for vary small samples are now calculated correctly
  • empty cells were set non-empty when copying from the matrix clipboard to the main matrix

New in DataLab 3.504 (Dec 18, 2012)

  • New Features:
  • DataLab provides now a simple way to extract data from text files
  • Improvements and Changes:
  • data imputation can now be applied row-wise, as well
  • plot window now offers an option to display date/time coordinates
  • DataLab now supports the direct import of both Excel XLS and XLSX files
  • MS Sans Serif is replaced by Arial font throughout the program to get more space for labels etc.
  • data editor now offers three additional button to scroll the spreadsheet
  • various cosmetic changes
  • Bug Fixes:
  • dendrogram now displays class colors after opening the cluster window
  • communication between data editor and data imputation window did work as expected
  • the final columns were not processed correctly when filtering the data rowwise
  • the level of measurement has been processed incorrectly when deleting marked columns
  • memory overflow fixed (occurred when displaying boxplots of marked data of huge matrices)
  • Durbin-Watson test in univariate Regression is now correctly applied (problem with unsorted data)

New in DataLab 3.503 (Dec 18, 2012)

  • New Features:
  • Pareto Charts
  • Improvements and Changes:
  • the matrix clipboard can now hold up to nine auxiliary matrices (copy of the original + 8 user defined)
  • the original data matrix is now automatically stored in matrix clipboard upon load from disk
  • the work matrix can now be selected from the matrix clipboard
  • data editor now displays the range and number of selected cells
  • random number generator: user defined profiles can now be saved to disk
  • PLS-DA: classification results now display various performance indicators
  • PLS-DA now provides cross validated true-positive- and false-positive rates
  • DataLab blog is now integrated into support menu
  • heading generator now generates month and day names using the DataLab language setting (and not the locale)
  • line and spectral plots now provide the option to indicate the data points
  • Bug Fixes:
  • script commands "markdata" and "unmarkdata" did not process parameter list correctly
  • univariate regression: object indicator now displays correct row name for marked data, as well
  • nominal identifiers are now correctly reset when reading IDT files
  • aborting the update process now provides appropriate feedback
  • marking the data in the test window did not affect the main data matrix
  • refresh of class symbols did not work when assigning different class symbols or class numbers
  • a few minor cosmetic bug fixes

New in DataLab 3.502 (Aug 28, 2012)

  • Improvements and Changes:
  • the dendrogram can now be displayed as numerical table and in Newick format
  • the help file now offers links to the corresponding pages of the DataLab-Blog (German only)
  • many small, mostly cosmetic changes
  • Bug Fixes:
  • import from XLS file: comment is now correctly initialized
  • the logarithmic display of the FFT plot generated a floating point error

New in DataLab 3.501 (Aug 21, 2012)

  • Improvements and Changes:
  • filter command can now be applied to several columns or rows and offers additional features (smoothed second derivative acc. to Savitzky-Golay, selection of storage mode)
  • script interpreter supports two additional commands ('filtercoeffs' and 'filter')
  • the speed of PLS discriminant analysis with very large data matrices has been increased by 20 to 50%
  • both the variable and the object selector support now the selection of data at regular intervals
  • PLS indicates the progress of a time-consuming calculation in a progress bar
  • help improved
  • Bug Fixes:
  • the background of main window is now drawn correctly even if DataLab spans several screens
  • invoking the correlation function or a statistical test via a script now correctly translates these windows
  • several translation errors in the German version fixed
  • the update dialog created a weird error message if a proxy between the user system and the update server required an authentication
  • changing the option "Use full precision when copying to clipboard" did not have any effect as long as the numeric data editor was open
  • control to set the filter size did now work properly
  • missing refresh message to the other windows after executing a script
  • matrix viewer did not refresh its image when empty state of cells changed
  • histogram of a column/row displayed a prompt to mark the data if the corresponding column/row was empty
  • normal probability plot raised an exception if the number of select data was too low

New in DataLab 3.500 (Aug 21, 2012)

  • New Features:
  • update window now provides a link to a Web page showing the latest changes
  • PLS-discriminant analysis implemented
  • dichotomisation tool implemented
  • new command "Data/Edit/Set to Zero/...." allows to set parts of the data matrix to zero values
  • new command "Create Indicator Variables" supports the generation of binary indicator variables
  • the new command "File/Recently Opened" allows to select from a list of previously opened files
  • Improvements and Changes:
  • the scatter plot window now displays marked data and allows to mark data of both types
  • process communication between various windows improved
  • help file improved
  • markings can now be exchanged using the numerical table editor
  • handling of logarithmic scale labels improved
  • colors of marked data are now adjustable by the user
  • histogram of nominal/ordinal variables now create a point histogram (one variable per bin) if class definition is set to automatic
  • ordinal and nominal scales now show the ordinals in parantheses if no identifiers are defined
  • PCR now has a user interface which resembles the MLR interface and allows to mark data
  • IDT format extended to include range mode of histograms, cumulative frequency plots and normal prob. plots
  • cumulative frequency plots for small data collections are now based on sorted data (and not on the histogram bins)
  • histogram setup now offers an automatic selection of the number of bins
  • cross correlation table now allows to switch between different measures of correlation
  • eyedroppers now invoke variable/object selection dialog; selection via matrix survey plot is no longer available
  • digitisation supports now logarithmic scales as well
  • protocols for the standards tests now display probabilities, as well
  • if two blocks are paired, the tests for normality now also test the differences of two blocks
  • file open/save dialogs now offer a filter option to narrow down the list of available files
  • "Split Data" command now allows to create test and training data sets and offers file template
  • PCA - speed of display of scores is now improved for large matrices
  • data editor now supports the inversion of markings
  • PLS cross validation protocol now includes the mean error traces of the individual target variables
  • the range of target values when applying a PLS model is now checked for a possible overlap with the descriptors
  • comments of PLSM files are now displayed in the file dialog
  • processing and user interface of correlation function improved
  • ANOVA now displays p-values and allows to create a protocol
  • deletion of files now provides feedback
  • cases of object and variable names are now ignored during sort
  • various minor improvements
  • PCA and PCR now take care of the scaling mode when indicating important components
  • misleading option "adjust matrix size after delete" discarded
  • initial startup process improved
  • Bug Fixes:
  • some minor bug fixes
  • colors in color selection boxes show now readable names (instead of technical colors constant identifiers)
  • DataLab now checks for file versions which are newer than the current program version
  • histogram/cumulative frequ./normal prob. plots of marked data now work as expected if no data are marked
  • cross correlation table does no longer indicate wrong minimum/maximum values when switching from one to another table
  • when loading images for digitisation via Windows explorer the BMP-files are now displayed in the open dialog
  • cross validation in PLS models did not select a random test set (but a consecutive block of data)
  • univariate statistics: all variables can now be selected (was limited to the first 20 variables)
  • levels of measurements have not been copied to and from auxiliary matrices
  • forbidden access to update server via proxy or gateway which requires login is now correctly recognized
  • Durbin-Watson test of regression residuals is now correctly classified if DW statistic is above 2.0
  • marking of data retriggered initialisation of PCA window
  • fluent editing of names and class numbers has almost been blocked by a faulty broadcast event
  • MLR variable selection window did not react on changes of the data matrix layout
  • when storing a PLS model, the names of the variables have been lost under certain circumstances
  • calculating univariate properties resulted in a runtime error when the matrix has less than 6 columns
  • PCR checks now for validity of variables
  • program crashed if size of data matrix was set to a length/width of greater than 2^31
  • program crashed if entire matrix was deleted
  • improved validity check of Windows registry avoids crashes in the base of corrupt registry entries