Last data update: 2014.03.03
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R: A function giving prediction information, from a nearest...
pamr.predict | R Documentation |
A function giving prediction information,
from a nearest shrunken centroid fit.
Description
A function giving prediction information,
from a nearest shrunken centroid fit
Usage
pamr.predict(fit, newx, threshold,
type = c("class", "posterior", "centroid", "nonzero"),
prior = fit$prior, threshold.scale = fit$threshold.scale)
Arguments
fit |
The result of a call to pamr.train
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newx |
Matrix of features at which predictions are to be made
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threshold |
The desired threshold value
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type |
Type of prediction desired: class predictions, posterior
probabilities, (unshrunken) class centroids, vector of genes
surviving the threshold
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prior |
Prior probabilities for each class. Default is that
specified in "fit"
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threshold.scale |
Additional scaling factors to be applied
to the thresholds. Vector of length equal to the number of
classes.
Default is that
specified in "fit".
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Details
pamr.predict Give a cross-tabulation of true versus
predicted classes for the fit returned by pamr.train or pamr.cv,
at the specified threshold
Author(s)
Trevor Hastie, Robert Tibshirani, Balasubramanian Narasimhan, and Gilbert Chu
Examples
set.seed(120)
x <- matrix(rnorm(1000*20),ncol=20)
y <- sample(c(1:4),size=20,replace=TRUE)
mydata <- list(x=x,y=y)
mytrain <- pamr.train(mydata)
mycv <- pamr.cv(mytrain,mydata)
pamr.predict(mytrain, mydata$x , threshold=1)
Results
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