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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Plot Short Time Fourier Transforms</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for plot.stft {e1071}"><tr><td>plot.stft {e1071}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Plot Short Time Fourier Transforms</h2> <h3>Description</h3> <p>An object of class <code>"stft"</code> is plotted as a gray scale image. The x-axis corresponds to time, the y-axis to frequency. If the default colormap is used, dark regions in the plot correspond to high values at the particular time/frequency location. </p> <h3>Usage</h3> <pre> ## S3 method for class 'stft' plot(x, col = gray(63:0/63), ...) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>x</code></td> <td> <p>An object of class <code>"stft"</code> as obtained by the function <code>stft</code>.</p> </td></tr> <tr valign="top"><td><code>col</code></td> <td> <p>An optional colormap. By default 64 gray values are used, where white corresponds to the minimum value and black to the maximum.</p> </td></tr> <tr valign="top"><td><code>...</code></td> <td> <p>further arguments to be passed to or from methods.</p> </td></tr> </table> <h3>Value</h3> <p>No return value. This function is only for plotting.</p> <h3>Author(s)</h3> <p>Andreas Weingessel</p> <h3>See Also</h3> <p>stft</p> <h3>Examples</h3> <pre>x<-rnorm(500) y<-stft(x) plot(y) </pre> <hr /><div style="text-align: center;">[Package <em>e1071</em> version 1.7-3 <a href="00Index.html">Index</a>]</div> </body></html>