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%#
%# fields is a package for analysis of spatial data written for
%# the R software environment.
%# Copyright (C) 2024 Colorado School of Mines
%# 1500 Illinois St., Golden, CO 80401
%# Contact: Douglas Nychka, douglasnychka@gmail.edu,
%#
%# This program is free software; you can redistribute it and/or modify
%# it under the terms of the GNU General Public License as published by
%# the Free Software Foundation; either version 2 of the License, or
%# (at your option) any later version.
%# This program is distributed in the hope that it will be useful,
%# but WITHOUT ANY WARRANTY; without even the implied warranty of
%# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
%# GNU General Public License for more details.
%#
%# You should have received a copy of the GNU General Public License
%# along with the R software environment if not, write to the Free Software
%# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
%# or see http://www.r-project.org/Licenses/GPL-2
%##END HEADER
%##END HEADER
\name{stats.bin}
\alias{stats.bin}
\title{
Bins data and finds some summary statistics.
}
\description{
Cuts up a numeric vector based on binning by a covariate and applies the
fields
stats function to each group
}
\usage{
stats.bin(x, y, N = 10, breaks = NULL,prettyBins=FALSE)
}
\arguments{
\item{x}{
Values to use to decide bin membership
}
\item{y}{
A vector of data
}
\item{N}{
Number of bins. If the breaks is missing there are N bins equally spaced
on the range of x.
}
\item{breaks}{
The bin boundaries. If there are N+1 of these there will be N bins.
The bin widths can be unequal.
}
\item{prettyBins}{If FALSE creates exactly N-1 bins. If TRUE the number of bins is determined by N and the pretty function.}
}
\value{
A list with several components. stats is a matrix with columns indexing
the bins and
rows being summary statistics found by the stats function. These are:
number of obs, mean, sd, min, quartiles, max and number of NA's.
(If there is no data for a given bin, NA's are filled in. )
breaks are the breaks passed to the function and centers are the bin
centers.
}
\seealso{
bplot, stats
}
\examples{
u<- rnorm( 2000)
v<- rnorm( 2000)
x<- u
y<- .7*u + sqrt(1-.7**2)*v
look<- stats.bin( x,y)
look$stats["Std.Dev.",]
data( ozone2)
# make up a variogram day 16 of Midwest daily ozone ...
look<- vgram( ozone2$lon.lat, c(ozone2$y[16,]), lon.lat=TRUE)
# break points
brk<- seq( 0, 250,,40)
out<-stats.bin( look$d, look$vgram, breaks=brk)
# plot bin means, and some quantiles Q1, median, Q3
matplot( out$centers, t(out$stats[ c("mean", "median","Q1", "Q3"),]),
type="l",lty=c(1,2,2,2), col=c(3,4,3,4), ylab="ozone PPB")
}
\keyword{univar}
% docclass is function
% Converted by Sd2Rd version 1.21.
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