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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"><html><head><title>SOM Toolbox / som_data_struct </title></head><body bgcolor=#f0f0f0><table border=0 width="100%" cellpadding=0 cellspacing=0><tr><td valign=baseline><font size=+2>SOM Toolbox</font></td><td valign=baseline align=center><a href="somtoolbox.html">Online documentation</td><td valign=baseline align=right><a href="http://www.cis.hut.fi/projects/somtoolbox/" target="_top">http://www.cis.hut.fi/projects/somtoolbox/</a></td></tr></table><hr><H1> som_data_struct </H1><H3> Purpose </H3><PRE> Creates a data structure. </PRE><H3> Syntax </H3><UL><PRE> sD = som_data_struct(D); sD = som_data_struct(...,'argID',value,...);</PRE></UL><H3> Description </H3><PRE> Creates a data struct. The struct contains, in addition to the data matrix, component names, normalization operations for the components, labels for each vector, and a name for the whole data set. All of these can be given in the optional arguments of the function. If left unspecified, they are given default values. Field Type Size / default value ------------------------------------------------------------------------ .type (string) 'som_data' .data (matrix) size dlen x dim .name (string) 'unnamed' .labels (cellstr) size dlen x m, {''; ''; ... ''} .comp_names (cellstr) size dim x 1, {'Variable1', 'Variable2', ...} .comp_norm (cell array) size dim x 1, {[], [], ... []} .label_names (cellstr) size m x 1, [] '.type' field is the struct identifier. Do not change it. '.data' field is the data matrix, each row is one data vector '.name' field is the identifier for the whole data struct '.labels' field contains the labels for each of the vectors. The ith of '.labels' contains the labels for ith data vector. Note that if some vectors have more labels than others, the others are are given empty labels ('') to pad the '.labels' array up. '.comp_names' field contains the names of the vector components '.comp_norm' field contains normalization information for each component. Each cell of '.comp_norm' is itself a cell array of normalization structs. If no normalizations are performed for the particular component, the cell is empty ([]). '.label_names' is similar to .comp_names field holding the names for each data label column</PRE><H3> Required input arguments </H3><PRE> D (matrix) The data matrix, size dlen x dim. The data matrix may contain unknown values, indicated by NaNs. </PRE><H3> Optional input arguments </H3><PRE> argID (string) Argument identifier string (see below). value (varies) Value for the argument (see below). The optional arguments can be given as 'argID',value -pairs as listed below. If an argument is given value multiple times, the last one is used. 'labels' (string array / cellstr) labels for each data vector, size dlen x m 'name' (string) data name 'comp_names' (string array / cellstr) component names, size dim x 1 'comp_norm' (cell array) normalization operations for each component, size dim x 1. Each cell is either empty, or a cell array of normalization structs. 'label_names'(string array / cellstr) label names, size m x 1</PRE><H3> Output arguments </H3><PRE> sD (struct) the data struct</PRE><H3> Examples </H3><PRE> Simplest case: D = rand(8, 3); % 8 3-dimensional vectors sD = som_data_struct(D); With optional arguments, the other fields can be given values: labs = cell(8, 1); labs{1, 1} = 'first_label'; cnames = {'first'; 'second'; 'third'}; sD = som_data_struct(D,'labels',labs,'name','a data struct'); sD = som_data_struct(D,'comp_names',cnames);</PRE><H3> See also </H3><TABLE NOBORDER WIDTH=80%><TR><TD><a href="som_set.html"><B>som_set</B></a><TD> Set values and create SOM Toolbox structs.<TR><TD><a href="som_map_struct.html"><B>som_map_struct</B></a><TD> Create a map struct.</TABLE><p><hr><br><br><!-- Last updated: May 30 2002 --></body></html>⌨️ 快捷键说明
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