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R Assignment Help | Data Visualization Using R

Updated: Mar 23, 2021

In this post, we will learn how to draw the line graph using R Studio.


# Define the cars vector with 5 values

cars <- c(1, 3, 6, 4, 9)


# Graph the cars vector with all defaults

plot(cars)


Output:











Now joining the line using:


# Define the cars vector with 5 values

cars <- c(1, 3, 6, 4, 9)


# Graph cars using blue points overlayed by a line

plot(cars, type="o", col="blue")


# Create a title with a red, bold/italic font

title(main="Autos", col.main="red", font.main=4)


Output:











Drawing multiple lines


# Define 2 vectors

cars <- c(1, 3, 6, 4, 9)

trucks <- c(2, 5, 4, 5, 12)


# Graph cars using a y axis that ranges from 0 to 12

plot(cars, type="o", col="blue", ylim=c(0,12))


# Graph trucks with red dashed line and square points

lines(trucks, type="o", pch=22, lty=2, col="red")


# Create a title with a red, bold/italic font

title(main="Autos", col.main="red", font.main=4)












Data visualization using the legend


# Define 2 vectors

cars <- c(1, 3, 6, 4, 9)

trucks <- c(2, 5, 4, 5, 12)


# Calculate range from 0 to max value of cars and trucks

g_range <- range(0, cars, trucks)


# Graph autos using y axis that ranges from 0 to max

plot(cars, type="o", col="blue", ylim=g_range,

axes=FALSE, ann=FALSE)


# Make x axis using Mon-Fri labels

axis(1, at=1:5, lab=c("Mon","Tue","Wed","Thu","Fri"))


# Make y axis with horizontal labels that display ticks at

# every 4 marks. 4*0:g_range[2] is equivalent to c(0,4,8,12).

axis(2, las=1, at=4*0:g_range[2])


# Create box around plot

box()


# Graph trucks with red dashed line and square points

lines(trucks, type="o", pch=22, lty=2, col="red")


# Create a title with a red, bold/italic font

title(main="Autos", col.main="red", font.main=4)


# Label the x and y axes with dark green text

title(xlab="Days", col.lab=rgb(0,0.5,0))

title(ylab="Total", col.lab=rgb(0,0.5,0))


# Create a legend at (1, g_range[2]) that is slightly smaller

# (cex) and uses the same line colors and points used by

# the actual plots

legend(1, g_range[2], c("cars","trucks"), cex=0.8,

col=c("blue","red"), pch=21:22, lty=1:2);


Output:











Thanks for reading if you need any types of data visualization help like pie graph, bar graph, etc, you can contact us at given below link


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