如何使用R语言在SAP Analytics Cloud里绘制各类统计图表

插入一个R visualization:编辑器

必定要确保图形出现这个model的小图标,表明这个R visualization的模型数据成功绑定以后才能进行下一步操做:ide

模型绑定成功后,在R script编辑器Environment标签页的Data下拉菜单里能看到模型数据。ui

使用这个SAP Analytics Cloud官方教程里提供的excel文件做为数据源:url

https://www.sapanalytics.clou...spa

该excel内容以下:excel

excel系统导入SAP Analytics Cloud后,须要使用simple transformation,将;分号分隔的值拆分红三列:code


逐一拆分:orm

拆分完毕以后,生成Model. 将这个url里包含的R脚本复制粘贴到R编辑器里:
https://www.sapanalytics.clou...blog

# Discription:
# Creating a histogram of the log returns, adding the kernel density of the log returns
# and the normal density as reference distribution 
#
# Requirements: 
# ggplot requires a data frame
# 
# Output:
# Histogram Plot
# 

library(ggplot2)

Simulated_data <- data.frame(Simulated_data)

histgg <- ggplot(data = Simulated_data, aes(logreturns))

histgg + geom_histogram(aes(y = ..density..),fill = "lightblue",color = "black", alpha = 0.8, position = "identity") +
  geom_density(aes(color = "Kernel Density"), size = 1) +
  stat_function(aes(color = "Normal Distribution"), fun = dnorm, args = list(mean = mean(Simulated_data$logreturns), sd = sd(Simulated_data$logreturns)), size = 1) +
  ggtitle("Histogram") +
  theme(panel.grid = element_line(linetype = "dashed", color = "lightgrey"), panel.background = element_rect(fill = "white"),
        panel.border = element_rect(colour = "black", fill=NA),
        plot.title = element_text(hjust = 0.5)) +
  scale_colour_manual("Density", values = c("red", "darkgreen")) +
  xlab(" ")+
  ylab("Frequency")

点击Execute按钮,就能够看到R脚本绘制出来的图形了:教程

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