diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
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+.Rproj.user
+.Rhistory
+.RData
+.Ruserdata
+Data
+ExData_Plotting1.Rproj
\ No newline at end of file
diff --git a/plot1.R b/plot1.R
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+++ b/plot1.R
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+# download and read the data 
+url <- "https://d396qusza40orc.cloudfront.net/exdata%2Fdata%2Fhousehold_power_consumption.zip"
+download.file(url = url, destfile = "Data/ElectricPowerConsumption.zip", mode = 'wb')
+
+dir.create("Data")
+setwd("Data")
+unzip(zipfile = "ElectricPowerConsumption.zip")
+setwd ("..")
+
+data <- read.table("Data/household_power_consumption.txt", sep = ";", header = TRUE, na.strings = '?')
+
+# select only the data from 2007-02-01 and 2007-02-02
+data$Date <- as.Date(data$Date, format = "%d/%m/%Y")
+data <- data[(data$Date >= "2007-02-01") & (data$Date <= "2007-02-02"), ]
+
+# convert the variable Global active power to data type numeric
+data$Global_active_power <- as.numeric(data$Global_active_power)
+
+png(filename = "plot1.png", width = 480, height = 480, units = "px")
+hist(data$Global_active_power, col = "red", main = "Global Active Power", 
+     xlab = "Global Active Power (kilowatts)")
+dev.off()
+
+
+
diff --git a/plot1.png b/plot1.png
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diff --git a/plot2.R b/plot2.R
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+# download and read the data 
+url <- "https://d396qusza40orc.cloudfront.net/exdata%2Fdata%2Fhousehold_power_consumption.zip"
+download.file(url = url, destfile = "Data/ElectricPowerConsumption.zip", mode = 'wb')
+
+dir.create("Data")
+setwd("Data")
+unzip(zipfile = "ElectricPowerConsumption.zip")
+setwd ("..")
+
+data <- read.table("Data/household_power_consumption.txt", sep = ";", header = TRUE, na.strings = '?')
+
+# select only the data from 2007-02-01 and 2007-02-02
+data$DateTime <- as.POSIXct(paste(data$Date, data$Time), format = "%d/%m/%Y %H:%M:%S")
+data <- data[(data$DateTime >= "2007-02-01") & (data$DateTime < "2007-02-03"), ]
+
+
+# convert the variable Global active power to data type numeric
+data$Global_active_power <- as.numeric(data$Global_active_power)
+
+
+png(filename = "plot2.png", width = 480, height = 480, units = "px")
+plot(x = data$DateTime, y = data$Global_active_power, pch = ".", xlab = ""
+     , ylab = "Global Active Power (kilowatts)")
+lines(data$DateTime, data$Global_active_power)
+dev.off()
diff --git a/plot2.png b/plot2.png
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diff --git a/plot3.R b/plot3.R
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+++ b/plot3.R
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+# download and read the data 
+url <- "https://d396qusza40orc.cloudfront.net/exdata%2Fdata%2Fhousehold_power_consumption.zip"
+download.file(url = url, destfile = "Data/ElectricPowerConsumption.zip", mode = 'wb')
+
+dir.create("Data")
+setwd("Data")
+unzip(zipfile = "ElectricPowerConsumption.zip")
+setwd ("..")
+
+data <- read.table("Data/household_power_consumption.txt", sep = ";", header = TRUE, na.strings = '?')
+
+# select only the data from 2007-02-01 and 2007-02-02
+data$DateTime <- as.POSIXct(paste(data$Date, data$Time), format = "%d/%m/%Y %H:%M:%S")
+data <- data[(data$DateTime >= "2007-02-01") & (data$DateTime < "2007-02-03"), ]
+
+
+png(filename = "plot3.png", width = 480, height = 480, units = "px")
+plot(x = data$DateTime, y = data$Sub_metering_1, pch = ".", xlab = "", 
+     ylab = "Energy sub metering")
+lines(x = data$DateTime, y = data$Sub_metering_1, col = "black")
+lines(x = data$DateTime, y = data$Sub_metering_2, col = "red")
+lines(x = data$DateTime, y = data$Sub_metering_3, col = "blue")
+legend("topright", col = c("black", "red", "blue"), lty = c(1, 1), 
+       legend = c("Sub_metering_1", "Sub_metering_2", "Sub_metering_3"))
+dev.off()
diff --git a/plot3.png b/plot3.png
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diff --git a/plot4.R b/plot4.R
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+# download and read the data 
+url <- "https://d396qusza40orc.cloudfront.net/exdata%2Fdata%2Fhousehold_power_consumption.zip"
+download.file(url = url, destfile = "Data/ElectricPowerConsumption.zip", mode = 'wb')
+
+dir.create("Data")
+setwd("Data")
+unzip(zipfile = "ElectricPowerConsumption.zip")
+setwd ("..")
+
+data <- read.table("Data/household_power_consumption.txt", sep = ";", header = TRUE, na.strings = '?')
+
+# select only the data from 2007-02-01 and 2007-02-02
+data$DateTime <- as.POSIXct(paste(data$Date, data$Time), format = "%d/%m/%Y %H:%M:%S")
+data <- data[(data$DateTime >= "2007-02-01") & (data$DateTime < "2007-02-03"), ]
+
+
+png(filename = "plot4.png", width = 480, height = 480, units = "px")
+# set the number of plots per row 
+par(mfrow = c(2, 2), mar = c(4, 4, 2, 1))
+# plot 1
+plot(x = data$DateTime, y = data$Global_active_power, pch = ".", xlab = ""
+     , ylab = "Global Active Power (kilowatts)")
+lines(data$DateTime, data$Global_active_power)
+
+# plot 2
+plot(x = data$DateTime, y = data$Voltage, pch = ".", xlab = "datetime"
+     , ylab = "Voltage")
+lines(data$DateTime, data$Voltage)
+
+# plot 3
+plot(x = data$DateTime, y = data$Sub_metering_1, pch = ".", xlab = "", 
+     ylab = "Energy sub metering")
+lines(x = data$DateTime, y = data$Sub_metering_1, col = "black")
+lines(x = data$DateTime, y = data$Sub_metering_2, col = "red")
+lines(x = data$DateTime, y = data$Sub_metering_3, col = "blue")
+legend("topright", col = c("black", "red", "blue"), lty = c(1, 1), 
+       legend = c("Sub_metering_1", "Sub_metering_2", "Sub_metering_3"), bty = "n", cex = .5)
+
+# plot 4
+
+plot(x = data$DateTime, y = data$Global_reactive_power, pch = ".", xlab = "datetime"
+     , ylab = "Global Reactive Power")
+lines(data$DateTime, data$Global_reactive_power)
+dev.off()
diff --git a/plot4.png b/plot4.png
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