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<HTML><HEAD><TITLE> SOM Toolbox / preprocess</TITLE></HEAD><BODY BGCOLOR="#FFFFFF"><TABLE BORDER=0 WIDTH="100%" CELLPADDING=0 CELLSPACING=0><TR><TD VALIGN=baseline><FONT SIZE=+2>SOM Toolbox</FONT></TD><TD VALIGN=baseline ALIGN=right><A HREF="../../helpdesk.html" TARGET="_top">Help Desk</A></TD></TR></TABLE><HR><A NAME="begin"><CENTER> <H1> SOM Toolbox - Preprocessing GUI </H1> </CENTER></A><H3> Syntax </H3><UL><PRE>  preprocess(sD)</PRE></UL><H3> Input parameters </H3> sD (struct or vector of structs)  'som_data' -struct or vector of 'som_data' -structs<H3> Introduction </H3>Preprocessing GUI for SOM Toolbox is a tool for manipulating 'som_data'-structs. GUI contains several preprocessing tools for data set.<H3> Using GUI </H3>Preprocessing GUI is shown in a Figure 1:<BR><BR><CENTER><IMG SRC="preproc.jpg" ALT="Preprocess"><BR><B> Figure 1. Preprocess </B></CENTER><P>In the upper left corner under the text '<I>DATA SETS</I>' is popup -menu thatselects the current data set. Loading, saving and renaming is performedby opening a <A HREF="#dataSetManagement">'<I>DATA SET MANAGEMENT</I>' -gui</A>using the button under this popup -menu. '<I>SELECTED DATA SET</I>' -field contains information of the current data set.<P>Field '<I>COMPONENT LIST</I>' contains the names of the components. Componentsfor preprocessing can be chosen from this field by using the mouse. A discreteselection can be made by pressing <I>&lt;CTRL&gt;</I> -key during the selection. <P>Pushbuttons beside the '<I>COMPONENT LIST</I>' -field visualize thechosen components.<UL> <LI> <I> PLOT </I> visualizes data points one after another.<LI> <I> BOX-PLOT</I> uses <I>Statistical Toolbox's <B>boxplot</B></I> -function (type '<B>help boxplot</B>' in workspace). <LI><I>HISTOGRAM</I> plots histograms  by using <I><B>n</B></I> bins (default <B>n</B> is 30, value can be changed by writing  the new one to the text box beside the <I>HISTOGRAM</I> -button. <LI> <I> XY-PLOT </I> plots the first two chosen components, the second asthe function of the first one. </UL><P>On the right of the buttons is the field '<I>AVERAGE</I>' which showsmeans of the selected vectors. The '<I>Relative Values</I>' -axis showsrelative statitistics of every components chosen vectors. The left limitif the axes is every components minimum and the right side maximum. Tha blacklines shows interval containing values of the chosen vectors. The circlesin the axis are the means of the chosen vectors and x -marks show showmedians.<P><I>STATISTICS</I> -field contains statistics of the current component,and in the <I>HISTOGRAM</I> -axis is the histogram of the current component.The current component is drawn in the axis, which is on the left side of thehistogram. This axis also shows the selected vectors as red circles. Thevector selections can be made by selecting regions from the axis. The<I>SELECT ALL</I> -button selects all vectors. The current component canbe chosen from the popup -menu under the axis. It should be noticed thatthis selection has nothing to do with the preprocessing operations. Itonly selects the component to be shown in the three fields above the popup -menu.<P>The '<I>LOG</I>' -field shows the results of the operation and the<I>CLOSE</I> -button closes the application.</BODY></HTML><A NAME="dataSetManagement"><H3> DATA SET MANAGEMENT </H3></A>Loading, saving and renaming data set can be done with the 'Data Set Management' -gui. <I>DATA SET MANAGEMENT</I> -button opens a following GUI:<BR><BR><CENTER><IMG SRC="sDman.jpg" ALT="Data Set Management"><BR><B> Figure 2. Data Set Management </B></CENTER><P>Renaming data set is simple. The new name has to be written to the positionwhere the current name is. This is also the case, when components arerenamed. The <I>RENAME</I> -button beside the '<I>COMPONENTS</I>' -fieldcompletes renaming components.<P>Data sets can be loaded from and saved to the workspace by using the arrow buttons. The variables in the workspace are shown under the '<I>WORKSPACE</I>'-text and the data sets in the memory of the <I>preprocess</I> -tool are shownunder the text '<I>DATA SETS</I>'. The darkened data set is copied or saved.<P>'<I>Data Set Management</I>' -gui has '<I>Tools</I>' -menu that containsthe following operations:<UL><LI>'<I>Copy</I>' copies a darkened data set.<LI>'<I>Delete</I>' deletes a darkened data set.<LI>'<I>Refresh</I>' refreshes the workspace variable set. </UL><H3> Menus of the Preprocess -tool </H3><I>Preprocess</I> -tool contains the following menus:<UL><LI>Normalization<LI>Components<LI>List</UL>The '<I>Normalization</I>' -menu contains the following functions:<UL><LI><I>Scale [0,1]</I> normalizes the normalizes the chosen componentsbetween the interval [0,1].<LI><I>Scale Var=1</I> scales normalizes the components chosen so thattheir means will become 0 and variance 1.<LI><I>Hist D</I>, See <A HREF="som_normalize.html">som_normalize</A><LI><I>Hist C</I>, See <A HREF="som_normalize.html">som_normalize</A><LI><I>Log</I>, See <A HREF="som_normalize.html">som_normalize</A><LI><I>Eval (1 comp)</I> evaluates the expression given by user. The Reservedword for the expression is <B><I>x</I></B> (the first chosen component).</UL><P>The '<I>Components</I>' -menu contains the following functions:<UL><LI><I>Move component</I> moves the first chosen component to the positionwanted.<LI><I>Copy Component</I> copies the first chosen component to the positionwanted.<LI><I>Add: N binary types</I> creates N new binary components (N is thenumber of different values in the chosen component.) Value in the newcomponent in the <B>k</B>th position is 1, if the value indicating the newcomponent is the same as the <B>k</B>th value in the chosen component, othervalues are zeros.<LI><I>Add: zeros</I> creates a new component containing zeros.<LI><I>Remove component</I> removes one component.<LI><I>Remove selected vectors</I> removes the vectors that can be seen asred circles in the axis under the <I>SELECT ALL</I> -button. It is possibleto save the values removed to the workspace.<LI><I>Select all components</I> sets all the components selected.</UL><P>The '<I>Misc</I>' -menu contains submenus and miscellanous operations.<UL><LI><I>Calculate</I> (submenu)<LI><I>Process</I> (submenu)<LI><I>Get LOG-file</I> saves all the operations done as an m-file.<LI><I>Indices of the selected vectors</I> saves indices as an vector tothe workspace.<LI><I>Undo</I> cancels only the previous operation.</UL><P>The '<I>Calculate</I>' -submenu contains the following operations:<UL><LI><I>Number of values</I> calculates the number of different valuesof the components chosen and prints them to the <I>LOG</I> -field.<LI><I>Number of selected vectors</I> calculates the number ofselected vectors and prints it to the <I>LOG</I> -field.<LI><I>Correlation</I> calculates the correlation of the first twoselected vectors and prints it to the <I>LOG</I> -field.</UL><P>The '<I>Process</I>' -submenu contains the following operations: <UL><LI><I>Unit length</I> scales vectors of the chosen components tothe unit length.<LI><I>Eval</I> evaluates the expression given by the user. The reservedwords are:<UL><LI><B><I>D</I></B>, the current data set<LI><B><I>xs</I></B>, the chosen components<LI><B><I>x</I></B>, the first of the chosen components<LI><B><I>cs</I></B>, indices of the chosen components<LI><B><I>c</I></B>, index of the first chosen component<LI><B><I>dim</I></B>, number of the components<LI><B><I>dlen</I></B>, number of the vectors</UL><LI><A HREF="#Clipping"><I>Clipping</I></A> opens a gui for data filtering.<LI><A HREF="#Delay"><I>Delay</I></A> opens a gui for setting delays to data.<LI><A HREF="#Windowed"><I>Windowed</I></A> opens a gui for <I>Windowed</I> -operation.<LI><A HREF="#SelVect"><I>Select Vectors</I></A> opens a gui for selecting vectors.</UL><A NAME="Clipping"><H3>The <I>Clipping</I> -gui</H3></A>By selecting <I>Clipping</I> from the <I>Misc/Processing</I> opens thefollowing gui:<BR><BR><CENTER><IMG SRC="clip.jpg" ALT="Clipping"><BR><B> Figure 3. Clipping </B></CENTER><P><I>Clipping</I> selects values of the chosen component by upper (<I>Smaller than </I> -field) and lower (<I>Bigger than</I> -field) limits and values thatare equal to some value (<I>Equal to</I> -field). Values are combined by<B><I>union</I></B>- (<I>OR</I> -option) or <B><I>intersect</I></B>- (<I>AND</I> -option) operation and then replaced by the value given by user (<I>Replace with</I> -field). The filtering is performed by pushing <I>Replace</I> -button. If <I>Among selected</I> -option is used, the selection is made among the selected vectors, otherwise it is made among all vectors (<I>All vectors</I> -option). <I>Close button</I> closesthis gui.<A NAME="Delay"><H3>The <I>Delay</I> -gui</H3></A>By selecting <I>Delay</I> from the <I>Misc/Processing</I> opens a followinggui:<BR><BR><CENTER><IMG SRC="delay.jpg" ALT="Delay"><BR><B> Figure 4. Delay </B></CENTER><P>The <I>Delay</I> -field sets the length of the delay.If the <I>Clip this</I> -option is chosen, the number of the vectors ofthe data set stays the same. The values that don't match to any of theold vectors are clipped away from the component to be delayed. <B><I>NaN</I></B>s will be added to the empty places. If <I>Clip all</I>option is used, points where otherwise would be <B><I>NaN</I></B>swhen used the former way, will be clipped away from all the components.Also, the number of vectors wii decrease. <I>Expand all</I> -option doesnot clip anything away from the component to be delayed. The number ofvectors will increase and the new vectors will have <B><I>NaN</I></B>severywhere else, but in the delayed component.<A NAME="Windowed"><H3>The <I>Windowed</I> gui</H3></A>By selecting <I>Windowed</I> from the <I>Misc/Processing</I> opens a followinggui:<BR><BR><CENTER><IMG SRC="window.jpg" ALT="Windowed"><BR><B> Figure 5. Windowed </B></CENTER><P>The length of operating window is set to the field <I>Window length</I>. Thefield containing options <I>Centered</I>, <I>Previous</I> or <I>Next</I>indicates whether the operational point of the window is in the middle (<I>Centered</I>), in the beginning (<I>Next</I>) or in the end (<I>Previous</I>).The four options in the middle of the gui (<I>Mean</I>,<I>Median</I>,<I>Max</I>,<I>Min</I>) indicates which operation is evaluatedin the window. The rightmost options, whether the number of vectors of thedata set increases (<I>Expand</I>) or stays the same (<I>Clip</I>).<P>The window is moved over the current component and the operation is evaluatedin every point. The result of the operation is set to the operational pointof the window.<A NAME="SelVect"><H3>The <I>Select Vectors</I> gui</H3></A>By selecting <I>Select Vectors</I> from the <I>Misc/Processing</I> opens a following gui:<BR><BR><CENTER><IMG SRC="selVect.jpg" ALT="Select Vectors"><BR><B> Figure 5. Select Vectors </B></CENTER>The <I>Select Vectors</I> -gui selects vectors in the same way as doesthe <A HREF="#Clipping"><I>Clipping</I></A> -gui. The difference is thatit does only the selection part and does not replace values.<P><I>Select Vectors</I> selects values of the chosen component by upper (<I>Smaller than </I> -field) and lower (<I>Bigger than</I> -field) limits and values that are equal to some value (<I>Equal to</I> -field). Values are combined by <B><I>union</I></B> (<I>OR</I> -option) or <B> <I>intersect</I></B> (<I>AND</I> -option) - operation.  If <I>Among selected</I> -option is used, the selection is made among the selected vectors, otherwise it is made among all vectors (<I>All vectors</I> -option).Vector indices that are given to the field <I>Vectors</I> are added tothe selection. <I>OK</I> -button evaluates selection and <I>Close</I> -button closes this gui.<HR><BR><CENTER>[ <A HREF="../../helpdesk.html" TARGET="_top">Help Desk</A> | <A HREF="somtoolbox.html">SOM Toolbox</A> ]</CENTER><BR>
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