ExData_Plotting1/plot3.R at master · blue-055/ExData_Plotting1 · GitHub

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setwd("~/ExData_Plotting1")

downloadURL <- "https://d396qusza40orc.cloudfront.net/exdata%2Fdata%2Fhousehold_power_consumption.zip"

if (!dir.exists("Data")) {
  dir.create("Data")
}

downloadFile <- "./Data/household_power_consumption.zip"
householdFile <- "./Data/household_power_consumption.txt"

if (!file.exists(householdFile)) {
  download.file(downloadURL, downloadFile, method = "curl", mode = "wb")
  unzip(downloadFile, overwrite = TRUE, exdir = "./Data")
}

plotData <- read.table(
  householdFile,
  header = TRUE,
  sep = ";",
  na.strings = "?",
  stringsAsFactors = FALSE
)

finalData <- plotData[plotData$Date %in% c("1/2/2007", "2/2/2007"), ]

SetTime <- strptime(
  paste(finalData$Date, finalData$Time, sep = " "),
  "%d/%m/%Y %H:%M:%S"
)

finalData <- cbind(SetTime, finalData)
columnlines <- c("black", "red", "blue") labels <- c("Sub_metering_1", "Sub_metering_2", "Sub_metering_3") plot(finalData$SetTime, finalData$Sub_metering_1, type="l", col=columnlines[1], xlab="", ylab="Energy sub metering") lines(finalData$SetTime, finalData$Sub_metering_2, col=columnlines[2]) lines(finalData$SetTime, finalData$Sub_metering_3, col=columnlines[3]) legend("topright", legend=labels, col=columnlines, lty="solid")

png("plot3.png", width = 480, height = 480)

columnlines <- c("black", "red", "blue")
labels <- c("Sub_metering_1", "Sub_metering_2", "Sub_metering_3")

plot(
  finalData$SetTime,
  finalData$Sub_metering_1,
  type = "l",
  col = columnlines[1],
  xlab = "",
  ylab = "Energy sub metering"
)

lines(finalData$SetTime, finalData$Sub_metering_2, col = columnlines[2])
lines(finalData$SetTime, finalData$Sub_metering_3, col = columnlines[3])

legend(
  "topright",
  legend = labels,
  col = columnlines,
  lty = 1
)

dev.off()

file.exists("plot3.png")