Downloads and update logs

Downloadables

Here is a list of changes between versions 1 and 2.

Update log

Jan 23rd 2003

• vis_som_show_data has been modified to be ok with matlab65 and logical variables (double conversion has been added)
• kmeans function has been changed to som_kmeans
• kmeans_clusters: cluster indices vector returned by som_kmeans has been transponed so that it is of the same shape than the initialized cluster indices. Parameters of db_index are re_ordered i.e. order of cluster prototypes and indices are changed.

May 30th 2002

• added functions som_cldist, som_clget, som_clplot, som_clset, som_clspread, som_clstruct, som_cllinkage, som_dmatminima, som_dmatclusters, som_cod2ind, som_ind2cod, db_index, som_gapindex, som_mdist, som_neighbors, som_neighf, som_fillnans, hits, som_distortion3, som_table_struct, som_table_modify, som_table_print, rep_utils, som_stats, som_stats_plot, som_stats_table, som_stats_report, som_drsignif, som_dreval, som_drmake
• fixed a small bug in som_recolorbar (rounded some tick values to zero)
• small renovations in kmeans function: added scalar kmeans for dim = 1 case
• corrected a bug in the Davies-Bouldin definition in kmeans_clusters (now calls db_index function)
• corrected a bug in som_order_cplanes: covariance was used instead of correlation coefficients
• added 'weights' option to som_batchtrain
• added some internal functions to som_fuzzycolor to make it work in enviroments where those functions do not exist in the global scope
• som_barplane erroneously used 'painters' mode for rendering, which does not work when color of the bars is stated explicitly using color triplets (unless a single color triplet is given). This has now been corrected.

Dec 21th 2001

• corrected a bug in som_show_add due to which the 'common' setting of 'sizefactor' argument did not work
• corrected the interpretation of 'subplots' argument of som_show: now the number of subplots is given as in the subplot command
• corrected a few bugs in calculation of Davies-Bouldin index in kmeans_clusters function
• added color coding functions som_coloring, som_kmeanscolor2 and som_fuzzycolor
• a corrected version of knn function which now also works with k=1
• fixed the 'Save map to workspace' menu item in som_gui: previously, the initialized map was saved, not the trained map
• fixed a bug in som_topol_struct which crashed map topology if the second eigenvalues was very small (compared to first)
• added set(gcf,'renderer','zbuffer') to the beginning of som_barplane, since it didn't work with 'painters' mode at all
• changed som_order_cplanes so that the positions are unique in the 'ring' and 'order' type orderings (as in 'SOM' type)
• removed set(gcf,'renderer','zbuffer') command from function som_show: it was there to prevent "RGB color data not yet supported in Painter's mode." warning messages, but resulted in figures being written to PostScript files as bitmaps, which made them > 6 MB in size.
• corrected a bug in som_train_struct which caused the mask to be all ones (even if specified otherwise) in certain situations

Nov 10th 2000

• added a new version of the kNN algorithm (named knn, the old version is now named knn_old) and two auxiliary functions for it: som_eucdist2 and som_label2num
• fixed from som_umat a bug that caused the function to return error 'Index exceeds matrix dimensions.' for 1-dimensional maps with hexagonal lattice.
• fixed som_modify_dataset so that 'addsamp' option can also handled data (and map) structs
• fixed a bug in vis_valuetype which caused som_grid to reject some valid linetypes (e.g. '--')
• added som_show_gui (and its internal functions)
• corrected a small bug in som_recolorbar: in certain situations the output argument was not given a value
• corrected a small bug in som_linkage: the 'order' output argument was never calculated
• changed som_show so that the default is now to show denormalized values
• added colorbars to the component planes of som_plotmatrix function
• added option 'subplots' to som_show which allows one to specify the size of the subplots grid

Jun 16th 2000

• added option 'comp' to vis_som_show_data to only retrieve data for component planes
• changed som_recolorbar a bit:
  • added the same 'comp' option as to vis_som_show_data
  • an 'n' is shown if the data is normalized
  • a vector can be given for 'ticks' argument, which is then applied to all given subplots
  • a scalar can be given for 'ticks' argument: then the ticks are set to n equally spaced values between (and including) minimum and maximum
  • som_recolorbar can now be applied to U-matrices and indexed colorplanes as well
• changed som_show so that only 3 ticks (min, mean, and maximum) are shown
• added function som_modify_dataset which makes it easy to add, (re)move, and extract samples and components from data structs
• added function som_linkage which allows one to apply hierarchical linkage clustering algorithms to SOMs
• added function som_dendrogram which for the visualization of hierarchical linkage clustering
• added function som_order_cplanes which can be used to order components (/variables) in different ways and to visualize them
• changed som_select so that the user can give the selection colors
• added function vis_planeGetArgs which enables one to give topology structs to som_*plane functions, changed som_*plane functions and som_demo* function accordingly
• added option 'training' to function som_make.m, using which the default training length can be decreased ('short') or increased ('long'), or given explicitly (e.g. [4 10])
• corrected a small bug in kmeans.m
• added 'eval' normalization method to som_norm_variable, corresponding changes made to som_normalize
• corrected a few bugs in the initialization of 1-D maps
• corrected a bug in som_read_cod.m which put the labels in wrong order: the change in the order of map units was not taken into account
• all functions have now a file in the online documentation
• the scientific papers (toolbox2paper.*) were removed from the documentation zip: you can download them straight from the documentation page

Apr 20th 2000

• corrected a bug in som_unit_dists.m which made the neighborhood definitions in cylinder and toroid maps slightly wrong
• renamed 'neigh' field in the grid struct to 'lattice' (this was more logical with respect to the other structs)
• added 'logistic' normalization function to som_norm_variable

Apr 11th 2000

• Removed 'qerror' field from the train struct.
• Added functions som_divide, somtoolbox, som_kmeanscolor and som_bmucolor, and changed the name of som_color_cluster to som_clustercolor.
• Changed som_gui so that it accepts a data matrix as argument as well, and works also in Matlab 5.2.
• And numerous smaller changes and bugfixes.

Feb 18th 2000

• Numerous small updates in files. For example, som_lininit and som_topol_struct should now take incomplete vectors into account, too.
• Added updated version of our paper in Matlab-DSP'99 conference to the documentation (as Word2000, PDF and PostScript).

Feb 17th 2000

• Openings of this new SOM Toolbox website featuring a more links, more documentation, new logo, and the official CIS WWW style!

Feb 11th 2000

• Added new beta version of SOM Toolbox 2.0 with: a lot of new functions, documentation, and some documention.

Dec 2nd '99

• Added second beta version of SOM Toolbox 2.0. Lot's of small bugs have been fixed (although many still remain), and the visualization function som_show_add should now be functional.

Nov 15th '99

• Added first beta version of SOM Toolbox 2.0.