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<html><head><title>rbf</title></head><body bgcolor=white><h1 align=center>Description of the program: <font color=Blue>rbf</font></h1><hr>This program models the data using a radial basis function (rbf)ansatz. The basis functions used are gaussians, with center pointschosen to be data from the time series. If the -X option is not given,a kind of Coulomb force is applied to them to let them drift a bit inorder to distribute them more uniformly. The variance of the gaussiansis set to the average distance between the centers.<br>This program either tests the ansatz by calculating theaverage forecast error of the model, or makes a i-step predictionusing the -L flag, additionally. The ansatz made is:<br>x<sub>n+1</sub>=a<sub>0</sub>+SUM a<sub>i</sub>f<sub>i</sub>(x<sub>n</sub>),<br>where x<sub>n</sub> is the nth delay vector and f<sub>i</sub> is agaussian centered at the ith center point.<hr><h2 align=center>Usage:</h2><center><font color=Red>rbf [Options]</font><p>Everything not being a valid option will be interpreted as a potential datafile name. Given no datafile at all, means read stdin. Also <font color=Red>-</font> means stdin<p>Possible options are:<p><table border=2><tr><th>Option<th>Description<th>Default</tr><tr><th>-l#<td>number of data to use<td>whole file</tr><tr><th>-x#<td>number of lines to be ignored<td>0</tr><tr><th>-c#<td><a href=../general.html#column>column to be read</a><td>1</tr><tr><th>-m#<td>embedding dimension<td>2</tr><tr><th>-d#<td>delay<td>1</tr><tr><th>-p#<td>number of centers<td>10</tr><tr><th>-X<td>deactivate drift (Coulomb force)<td>activated</tr><tr><th>-s#<td>steps to forecast (for the forecast error)<td>1</tr><tr><th>-n#<td>number of points for the fit;<br>The other points are used toestimate the out of sample error<td>number of data</tr><tr><th>-L#<td>determines the length of the predicted series<td>none</tr><tr><th>-o#<td><a href=../general.html#outfile>output file name</a>; without -o stdout is used<td>'datafile'.rbf</tr><tr><th>-V#<td><a href=../general.html#verbosity>verbosity level</a><br> 0: only panic messages<br> 1: add input/output messages<td>1</tr><tr><th>-h<td>show these options<td>none</tr></table></center><hr><h2 align=center>Description of the Output</h2>The output file contains: The coordinates of the center points, thevariance used for the gaussians, the coefficients (weights) of thebasis functions used for the model, the forecast errors and if the -Lflag was set, the predicted points.<hr>View the <a href="../../source_c/rbf.c"> C-sources</a>.<hr><a href=../contents.html>Table of Contents</a> * <a href="../../index.html" target="_top">TISEAN home</a></body></html>⌨️ 快捷键说明
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