R绘图（02）——ggplot简单折线图

数据库依然采用的01篇的数据库

数据处理思路和01篇异曲同工之妙

这次是根据年份绘制平均气温，即需要先求得各个时间点的平均气温，再根据xy进行绘制

 

效果如下：

 

 

 

var2<-c("Year_F","TempC")
lineICE<-ICE[var2]
colnames(lineICE) <- c("YEAR","T")
mean_C <- matrix(NA, nrow=8, ncol=2)
for (i in 1:8){
  mean_C[i,1] <- i+2010
  mean_C[i,2] <- mean(lineICE$T[lineICE$YEAR==i+2010],na.rm = TRUE)
}
mean_C<-as.data.frame(mean_C)
colnames(mean_C) <- c("YEAR","T")

lineACL<-ACL[var2]
colnames(lineACL) <- c("YEAR","T")
mean_A <- matrix(NA, nrow=3, ncol=2)
for (i in 1:3){
  mean_A[i,1] <- i+2016
  mean_A[i,2] <- mean(lineACL$T[lineACL$YEAR==i+2016],na.rm = TRUE)
}
mean_A<-as.data.frame(mean_A)
colnames(mean_A) <- c("YEAR","T")

ICET<-ggplot(data = mean_C, mapping = aes(x = YEAR, y = T)) + geom_line()+ theme_bw() + theme(panel.grid=element_blank())
ICET<-ICET+scale_x_continuous(breaks = seq(2011, 2018, by = 1))+ylab("Temperature")

ACLT<-ggplot(data = mean_A, mapping = aes(x = YEAR, y = T)) + geom_line()+ theme_bw() + theme(panel.grid=element_blank())
ACLT<-ACLT+scale_x_continuous(breaks = seq(2017, 2019, by = 1))+ylab("Temperature")

ggarrange(ICET,ACLT, labels = c("A", "B"),ncol = 1, nrow = 2)