问题描述
通过太阳黑子数据的 tidyverse 时间序列示例,当我尝试以 10 年为增量绘制图形时收到以下错误消息,似乎无法识别在步骤 1 中创建的新日期变量,想知道这是否是格式问题.
错误:mutate()
列 decade
有问题。
我decade = f(date)
。
x 下标越界
感谢任何帮助
# libraries
library(datasets)
library(tidyverse)
library(tsibble)
library(ggplot)
# Tidy the data
tidy_ts <- sunspots %>%
as_tsibble() %>% # Convert to timeseries tibble
mutate( # Create new variables
year = year(index),# Create a year column
month = month(index) # Create a month column
) %>%
select( # Select,reorder,rename vars
date = index,# Rename "index" to "date"
year,# Use "year" as second variable
month,# Use "month" as third variable
spots = value # Rename "value" as "spots"
) %>%
print() # Show data
view(tidy_ts)
# Graph the tidy data by decade
tidy_ts %>%
index_by( # By decade
decade = ~ floor_date(tidy_ts$date,years(10))
) %>%
summarise(mean_s = mean(spots)) %>% # Mean for decade
ggplot(aes(decade,mean_s)) + # Plot means
geom_point() + # Scatterplot
geom_smooth() + # Smoother
ylab("Sunspots: Mean by Decade") # Label
解决方法
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