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カラーパレット

library(spdep)

## Loading required package: sp

## Loading required package: boot

## Loading required package: Matrix

## Loading required package: lattice

## 
## Attaching package: 'lattice'
## 

## The following object(s) are masked from 'package:boot':
## 
##     melanoma
## 

## Loading required package: MASS

## Loading required package: nlme

## Loading required package: maptools

## Loading required package: foreign

## Checking rgeos availability: TRUE

## Loading required package: deldir

## deldir 0.0-19

## 
##      PLEASE NOTE:  The components "delsgs" and "summary" of the 
##      object returned by deldir() are now DATA FRAMES rather than 
##      matrices (as they were prior to release 0.0-18). 
##      See help("deldir").
##  
##      PLEASE NOTE: The process for determining duplicated points
##      has changed from that used in version 0.0-9 (and previously).
## 

## Loading required package: coda

library(classInt)

## Loading required package: class

## Loading required package: e1071

# コロンバス市の犯罪発生データ
d <- readShapePoly(system.file("etc/shapes/columbus.shp",package="spdep")[1])
# 白地図の表示
plot(d)

# カラーパレット（白→赤）の作成
pal <- c("white","red")
cls1 <- classIntervals(d$CRIME, n=5, style="quantile") # 等量分類
cls2 <- classIntervals(d$CRIME, n=5, style="equal") # 等間隔分類
cls3 <- classIntervals(d$CRIME, n=5, style="sd") # 標準偏差分類
cls4 <- classIntervals(d$CRIME, n=5, style="fisher") # 自然階級分類
cls5 <- classIntervals(d$CRIME, n=5, style="pretty") # 視覚的に分かりやすい分類
cls6 <- classIntervals(d$CRIME, n=5, style="kmeans") # 非階層クラスタリングによる分類
cls7 <- classIntervals(d$CRIME, n=5, style="hclust") # 階層クラスタリングによる分類
par(mfrow=c(2,4))
plot(cls1, pal=pal, main="quantile")
plot(cls2, pal=pal, main="equal")
plot(cls3, pal=pal, main="sd")
plot(cls4, pal=pal, main="fisher")
plot(cls5, pal=pal, main="pretty")
plot(cls6, pal=pal, main="kmeans")
plot(cls7, pal=pal, main="hclust")

# 塗分け方の指定
color.pal <- findColours(cls1, pal)
# 塗分け地図の作成
par(mfrow=c(1,1))
plot(d, col=color.pal)
title(main="quantile")
legend("topleft", fill=attr(color.pal, "palette"),
legend=names(attr(color.pal,"table")),bty="n")