[英]Adding legend in ggplot2
I have looked through similar questions and I have a feeling I have done everything. 我已经看过类似的问题,并且觉得自己已经做了所有事情。 Still not getting the desire output.
仍然没有得到欲望的输出。 I am using ggplot2 and tidyquant packages to visualize data with 2 financial trends I am trying to display a legend that contains trends line coloron plot
我正在使用ggplot2和tidyquant软件包来可视化具有2个财务趋势的数据,我试图显示一个包含趋势线颜色图的图例
data %>%
ggplot(aes(date, price)) +
geom_line() +
geom_ma(ma_fun = SMA, n = 50, size = 1 , col = "red" , show.legend = TRUE)+
geom_ma(ma_fun = SMA, n = 200, size = 1 , col = "blue", show.legend= TRUE)+
theme_tq()
Here you go: 干得好:
library(tidyquant)
library(ggplot2)
data <- data.frame(date = 1:1000, price = cumsum(rnorm(1000)))
data %>%
ggplot(aes(date, price)) +
geom_line() +
geom_ma(aes(color = 'MA50'), ma_fun = SMA, n = 50, size = 1 ,show.legend = TRUE)+
geom_ma(aes(color = 'MA200'), ma_fun = SMA, n = 200, size = 1 , show.legend = TRUE) +
scale_colour_manual(name = 'Legend',
guide = 'legend',
values = c('MA50' = 'red',
'MA200' = 'blue'),
labels = c('SMA(50)',
'SMA(200)'))
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