help color coding map in R

Flex,

I apologize for not sending the data. I have attached the Rdata set and an excel version and I've attached the graph. I have not use mapplot before is that a better option if so then will you pass along the syntax I would use. As far as using the current logic, I tried adding your suggesting to the groups variable and I get the same result. I also have a field within my data called BdgtGrp, which I placed in the groups option, but the state colors don?t match the levels I have in the legend. Idealy, I would like those states that I have identified with BdgtGrp=="Significanlty high" be in "red", purple for those identified as "Mid-High" and light blue for those identified as "High". If not by these flags then I would want the colors be for the ranges specified within the class level.

In any case, I expect Ohio, followed by New Mexico, and Arizona to be in "red". In order for me to get the states highlighted in the proper color are you suggesting I do a reorder on ?this section of the code "core.states=map("state", regions=NatSTSummaryHigh.abi$JurisdtnStateName[subscripts],
?plot=FALSE, fill=TRUE)" ?




Chris Anderson
Data Analyst
Medical Affairs
wk: 925-677-4870
cell: 707-315-8486
Fax:925-677-4670


-----Original Message-----
From: foolish.android at gmail.com [mailto:foolish.android at gmail.com] On Behalf Of Felix Andrews
Sent: Saturday, May 15, 2010 6:41 AM
To: Anderson, Chris
Cc: r-help at R-project.org
Subject: Re: [R] help color coding map in R

The 'groups' argument should be a factor, which explicitly defines the
ordering of its levels. Otherwise it is converted to a factor using
the default ordering which is alphabetical. You can make a factor
ordered by occurence as, eg., factor(z, levels = unique(z)). Or use
reorder().

Note that data attachments don't work on this list. After constructing
a minimal example, it is best to dump the required objects in a
pastable form using dput().

I'm guessing you have some reason that you are not using mapplot()...

-Felix

On Saturday, May 15, 2010, Anderson, Chris
<chris.anderson at paradigmcorp.com> wrote:

I am trying to create a map with selected states based on highest to lowest mean cost. The following code properly selects the correct states, and the legend is properly color coded with ranges, but the colors per range does not match the state colors. I need help getting the state colors to match the ranges outlined in the legend. I have tried ordering the mean amounts and this correctly creates the vector of colors in the correct order, but when applied to the map the colors don't match. Attached is the R dataset of my data. Please help me tweak the map so the colors are properly assigned.

# Get the entire US map for use later.
us.map <- map("state", plot = FALSE, fill = TRUE)

# Calculate the range of the map (with extra margins).
xl <- extendrange(us.map$range[1:2])
yl <- extendrange(us.map$range[3:4])

library(maps)
library(lattice)
library(latticeExtra)
library(RColorBrewer) # creates nice color schemes
library(classInt)


plotclr <- brewer.pal(nclr,"PuRd")
class <- classIntervals(NatSTSummaryHigh.abi$STMean, nclr, style="fisher" )
colcode <- findColours(class, plotclr)


# Plot a multi-panel map of all the states, and colour
xyplot(y~x | NatSTSummaryHigh.abi$PrimaryDX, data = state.center,groups=names(attr(colcode, "table")),
?? ?main="High Cost States by Diagnosis ( > National Avg)",
?? ?xlim = xl, ylim = yl, scales = list(draw=FALSE),
?? ?aspect = "iso",
?? ?xlab = NULL, ylab = NULL,
?? ?strip = strip.custom(var.name="Diagnosis", sep=": ",
?? ?strip.names=TRUE, strip.levels=TRUE),
?? ?auto.key=list(border=TRUE,space="right",text=names(attr(colcode, "table"))),
?? ?par.settings = simpleTheme(pch=16,col=attr(colcode, "palette"),cex=0.9),
?? ? subscripts = TRUE,
?? ?panel = function(..., subscripts) {
?? ? ? ?# Plot the entire US map.
?? ? ? ?panel.polygon(us.map$x,us.map$y)
?? ? ? ?# Select the states to plot.
?? ? ? ?core.states=map("state", regions=NatSTSummaryHigh.abi$JurisdtnStateName[subscripts],
?? ? ? ? ? ?plot=FALSE, fill=TRUE)

?? ? ? ?# Plot the states.
?? ? ? ?panel.polygon(core.states$x, core.states$y,
?? ? ? ? ? ?col = trellis.par.get("superpose.line")$col)
?? ?} )


Chris Anderson
Data Analyst
Medical Affairs
wk: 925-677-4870
cell: 707-315-8486
Fax:925-677-4670


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This electronic message transmission, including any attachments, contains
information which may be confidential, privileged and/or otherwise exempt
from disclosure under applicable law. The information is intended to be for the
use of the individual(s) or entity named above. If you are not the intended
recipient or the employee or agent responsible for delivering the message
to the intended recipient, you are hereby notified that any disclosure, copying,
distribution or use of the contents of this information is strictly prohibited. ?If
you have received this electronic transmission in error, please notify the sender
immediately by telephone (800-676-6777) or by a "reply to sender only"
message and destroy all electronic and hard copies of the communication,
including attachments. ?Thank you.

For more information on Paradigm Management Services, LLC, please visit
http://www.paradigmcorp.com