Displaying 2 results from an estimated 2 matches for "rippley".
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ripley
2012 Nov 02
2
Merge data frame with mispelling characters
...t;yes", rep("no", 4)))
"Venables" is without the final 's', and "Tierney, without "i".
# Data for books:
books <- data.frame(
surname = I(c("Tukey", "Venables", "Tierney",
"Ripley", "Rippley", "McNeil", "R Core")),
title = c("Exploratory Data Analysis",
"Modern Applied Statistics ...",
"LISP-STAT",
"Spatial Statistics", "Stochastic Simulation",
"In...
2008 Jul 31
1
nls weights warning message
...~~~
and I would like to know what is causing it and how I can fix it.
As an example, the following, from Venables and Ripley, which does not
produce the warning message and then on the data which does procude the
warning message.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
##Venables and rippley
library(MASS)
data(wtloss)
wtloss.st = c(b0=90, b1=95, th=120)
n1<-length(wtloss)
Weight=c(1,rep(0.1,n1-1))
wtloss.fm = nls(Weight ~ b0 + b1*2^(-Days/th), data=wtloss, start=wtloss.st,
trace=T, weights=Weight )
wtloss.fm
##My data
y<-c(73,73,70,74,75,115,105,107,124,107,116,125,102,144,178...