Graphs are one of the easiest way to do some quick analysis on the data and help us get the basic information like variance, spread etc..
In this article we will understand how to do data visualisation using R and will download SBI one year data (from NSE website) to play with it - You can do the same by using Quantmod library as well.
> library(ggplot2)
#! read sbi stock data from the downloaded file
> SBI <- read.csv(file = "03-06-2018-TO-31-05-2019SBINALLN.csv", header=TRUE,sep = ",")
#! take only EQ series from the data
> SBIEQ <- SBI[SBI$Series == 'EQ',]
#! checking the types of data in various columns
> sapply(SBIEQ, typeof)
Symbol Series Date Prev.Close
"integer" "integer" "integer" "double"
Open.Price High.Price Low.Price Last.Price
"double" "double" "double" "double"
Close.Price Average.Price Total.Traded.Quantity Turnover
"double" "double" "integer" "double"
No..of.Trades Deliverable.Qty X..Dly.Qt.to.Traded.Qty
"integer" "integer" "double"
#! converting Date into correct format as it was not in date format
> SBIEQ$Date <- as.Date(SBIEQ$Date,format = "%d-%b-%Y")
#! Plotting the graph
#! first argument is the data frame, second argument defines the variables to be used while 3rd argument is to define the kind of graph
#! please refer ggplot document as there are multiple options of graphs are available
> ggplot(SBIEQ,aes(x=Date, y= Close.Price)) + geom_point() + scale_x_date()
> ggplot(SBIEQ,aes(x=Date, y= Close.Price, color = Deliverable.Qty )) + geom_point() + scale_x_date()
