绘制一个单一的geom_smooth曲线而不是多个曲线 [英] Plot a single geom_smooth curve instead of multiple

问题描述

我正在用不同颜色表示的3种不同类别的图形绘制。我想要一条曲线来表示总数据的趋势，但是当我使用geom_smooth时，我会得到3条曲线，每条曲线对应一条曲线。我的代码是：
$ b $ pre $ $ $ $ $ $ $ $ $ $ $ $ $ b $ ggplot（data = transfer_data，aes（x = DATE_OF_TRANSFER，y = NUMBER_OF_TRANSFERS，color = region））+ geom_point（）+ geom_smooth（）+ scale_colour_manual（values = c（green，blue，red，orange））

解决方案

有两种解决方法：
1）在geom_smooth层中覆盖颜色aestetic

 ＃绘制数据
 ggplot（data = transfer_data，
 mapping = aes（x = DATE_OF_TRANSFER，
y = NUM​​BER_OF_TRANSFERS，
 color = region））+ 
 geom_point（）+ 
 geom_smooth（color =black）+ 
 scale_colour_manual（values = c（green， blue，red，orange））
  

或
2）移动颜色仅适用于需要它的图层

 ＃绘制数据
 ggplot（data = transfer_data，
 mapping = aes（x = DATE_OF_TRANSFER，
 y = NUM​​BER_OF_TRANSFERS））+ 
 geom_point（mapping = aes（color = region））+ 
 geom_smooth（）+ 
 scale_colour_manual（values = c（green，blue，red ，orange））
  

I am plotting a graph with 3 different categories that are represented by different colours. I want one curve to represent the trend of the total data, but when I use geom_smooth I get 3 curves, one for each category. My code is:

#plot the data
ggplot(data=transfer_data, aes(x=DATE_OF_TRANSFER, y=NUMBER_OF_TRANSFERS, colour = region)) + geom_point() + geom_smooth() + scale_colour_manual(values=c("green", "blue", "red", "orange")) 

解决方案

There are two ways of solving this: 1) Override color aestetic in geom_smooth layer

   #plot the data
   ggplot(data=transfer_data, 
          mapping=aes(x=DATE_OF_TRANSFER, 
                      y=NUMBER_OF_TRANSFERS, 
                      colour = region)) + 
    geom_point() + 
    geom_smooth(color="black") + 
    scale_colour_manual(values=c("green", "blue", "red", "orange"))

or 2) Move color aestetic only to layer(s) that need it

   #plot the data
   ggplot(data=transfer_data, 
          mapping=aes(x=DATE_OF_TRANSFER, 
                      y=NUMBER_OF_TRANSFERS)) + 
    geom_point(mapping=aes(colour = region)) + 
    geom_smooth() + 
    scale_colour_manual(values=c("green", "blue", "red", "orange"))

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