📄 class.ind.html
字号:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><title>R: Generates Class Indicator Matrix from a Factor</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" type="text/css" href="../../R.css">
</head><body>
<table width="100%" summary="page for class.ind {nnet}"><tr><td>class.ind {nnet}</td><td align="right">R Documentation</td></tr></table>
<h2>Generates Class Indicator Matrix from a Factor</h2>
<h3>Description</h3>
<p>
Generates a class indicator function from a given factor.
</p>
<h3>Usage</h3>
<pre>
class.ind(cl)
</pre>
<h3>Arguments</h3>
<table summary="R argblock">
<tr valign="top"><td><code>cl</code></td>
<td>
factor or vector of classes for cases.
</td></tr>
</table>
<h3>Value</h3>
<p>
a matrix which is zero except for the column corresponding to the class.</p>
<h3>References</h3>
<p>
Venables, W. N. and Ripley, B. D. (2002)
<EM>Modern Applied Statistics with S.</EM> Fourth edition. Springer.
</p>
<h3>Examples</h3>
<pre>
# The function is currently defined as
class.ind <- function(cl)
{
n <- length(cl)
cl <- as.factor(cl)
x <- matrix(0, n, length(levels(cl)) )
x[(1:n) + n*(unclass(cl)-1)] <- 1
dimnames(x) <- list(names(cl), levels(cl))
x
}
</pre>
<hr><div align="center">[Package <em>nnet</em> version 7.2-44 <a href="00Index.html">Index]</a></div>
</body></html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -