【发布时间】:2018-01-10 21:38:17
【问题描述】:
我正在尝试通过将预测对象转换为强化对象来绘制预测对象,正如this 堆栈溢出主题中所建议的那样。
这里是dataset 的链接,您将在下面找到生成两个对象(emea 和 df1)的代码,这两个对象的日期应该相同,其中一个对象是基于另一个对象的转换。
# Load required libraries
library(forecast)
library(lubridate)
library(tidyverse)
library(scales)
library(ggfortify)
# Load dataset
emea <- read.csv(file="C:/Users/nsoria/Downloads/AMS Globales/EMEA_Depuy_Finanzas.csv", header=TRUE, sep=';', dec=",")
# Create time series object
ts_fin <- ts(emea$Value, frequency = 26, start = c(2014,11))
# Pull out the seasonal, trend, and irregular components from the time series
model <- stl(ts_fin, s.window = "periodic")
# Predict the next 3 bi weeks of tickets
pred <- forecast(model, h = 5)
# Round values to better accuracy
pred$mean <- round(pred$mean)
# Convert pred from list to data frame object
df1 <- fortify(pred) %>% as_tibble()
# Convert ts decimal time to Date class
df1$Date <- as.Date(date_decimal(df1$Index), "%Y-%m-%d")
# Remove Index column and rename other columns
# Select only data pts after 2017
df1 <- df1 %>%
select(-Index) %>%
filter(Date >= as.Date("2017-01-01")) %>%
rename("Low95" = "Lo 95",
"Low80" = "Lo 80",
"High95" = "Hi 95",
"High80" = "Hi 80",
"Forecast" = "Point Forecast")
这是first 对象 (emea) 和 second 对象 (df1) 的屏幕截图。
我的第一个假设是,当我遇到错误时,这与时区有关:
Warning message:
In as.POSIXlt.POSIXct(x, tz = tz) : unknown timezone '%Y-%m-%d'
任何帮助将不胜感激。
【问题讨论】:
标签: r dataset data-science