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R绘图模板——世界地图的绘制及拓展！！！
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主要代码如下：
rm(list = ls())setwd("D:/桌面/世界地图绘制")
#加载R包library(ggplot2)2、加载绘图世界地图的数据（这里按理说应该加载maps包，但是好像加载ggplot2包即可导入数据，没搞明白）：df_map <- map_data("world")3、绘制基础世界地图：##绘制基础世界地图p <- ggplot(df_map,aes(long, lat, group = group)) + geom_polygon()+ borders("world",regions = ".",color = "grey50",fill="white",size=0.5)+ #主题设置 theme_void()pp+geom_polygon(aes(fill=region),show.legend = F)+ theme(plot.background = element_rect(fill="#76daff"))p+geom_polygon(aes(fill=order))p+coord_map("ortho")#构造采样点的经纬度df_sample1 <- data.frame( lon=runif(12, min = 0, max = 120), lat=runif(12, min = 25, max = 45), group=rep(c('1980','2000','2005','2010'),times=c(3,3,3,3)))df_sample2 <- data.frame( lon=runif(12, min = -125, max = -75), lat=runif(12, min = 30, max = 65), group=rep(c('1980','2000','2005','2010'),times=c(1,5,4,2)))df_sample3 <- data.frame( lon=runif(12, min = -5, max = 20), lat=runif(12, min = 10, max = 25), group=rep(c('1980','2000','2005','2010'),times=c(2,5,3,2)))#合并数据df_sample <- rbind(df_sample1,df_sample2,df_sample3)#顺便统计出各组的数量data <- data.frame(group=c('1980','2000','2005','2010'), value=c(6,13,10,7))##绘制子图p2 <- ggplot(data,aes(group,value,fill=group))+ geom_col()+ scale_fill_manual(values = c("#00c700", "#da0000","#0054da","#6a3d00"))+ theme_classic()+ theme(legend.position = "none", axis.text.x = element_blank(), axis.text.y = element_text(color = "black",size=12), axis.line.x = element_blank(), axis.ticks.x = element_blank(), panel.background = element_blank(), plot.background = element_blank())+ labs(x='', y='')+ scale_y_continuous(expand = c(0,0))
#添加采样点信息p+geom_point(df_sample, mapping=aes(lon, lat, fill = group), size=3,shape=21,color="black", show.legend = T)+ scale_fill_manual(name=NULL,values = c("#00c700", "#da0000","#0054da","#6a3d00"))+ annotation_custom(grob=ggplotGrob(p2), ymin = -75, ymax = -30, xmin=-190, xmax=-80)+ theme(legend.position = c(0.1,0.5))PS: 以上内容是小编个人学习代码笔记分享，仅供参考学习，欢迎大家一起交流学习。
完整代码（附带注释）及原始数据获取：
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