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6 Pages

### functions

Course: WEBPAGES 519, Fall 2008
School: Idaho
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Word Count: 1214

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&lt;- chisplot function(x) { if (!is.matrix(x)) stop(&quot;x is not a matrix&quot;) ### determine dimensions n &lt;- nrow(x) p &lt;- ncol(x) # xbar &lt;- apply(x, 2, mean) S &lt;- var(x) S &lt;- solve(S) index &lt;- (1:n)/(n+1) # xcent &lt;- t(t(x) - xbar) di &lt;- apply(xcent, 1, function(x,S) x %*% S %*% x,S) #...

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pseudoF &lt;- function(X, k, ns = 25){nk &lt;- length(k)n &lt;- nrow(X)T &lt;- sum(scale(X,scale=F)^2)W &lt;- rep(T, nk)for (i in 1:nk){cli &lt;- kmeans(X, k[i], nstart=ns)W[i] &lt;- sum(cli\$withinss)}pF &lt;- (T-W)/(k-1)/(W/(n-k)return(list(k=k, W=W, pF=p
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