R Language –Presentation of Data : Online Course

Mar 02, 2022 by admin in Uncategorized

R Scatter Plot

The scatter plots are used to compare variables.
Comparison between variables is meant to define how much one variable is affected by another variable.
In a scatter plot, the data is represented as a collection of points and plots one point for each observation..
Each point on the scatter plot defines the values of the two variables.
One variable is selected for the vertical axis and other for the horizontal axis.
The simple scatter plot is created using the plot() function.

There is the following syntax for creating scatter plot in R:

Plot(x,y,…)

And its complete syntax is:

plot(x, y, type, main, sub, xlab, ylab)

Following arguments in details.

S.NO	PARAMETER	DESCRIPTION
1.	v	It is a vector which contains the numeric values. x is specifies points on the x-axis. y is specifies points on the y-axis.
2.	type	change the plot type. It accepts the following strings and has the given effect.”p” – points “l” – lines “b” – both points and lines “c” – empty points joined by lines “o” – overplotted points and lines “s” and “S” – stair steps “h” – histogram-like vertical lines “n” – does not produce any points or lines
3.	xlab	It is the label for the x-axis.
4.	ylab	It is the label for the y-axis.
5.	main	It is the title of the chart.
6.	col	It is used to give the color for both the points and lines
7	pch	pch is used to change the point shape format.
8	cex	Use cex=number to change the size of the points
9	Legend()	Legend takes as input the coordinates, text and the symbols to be interpreted.
10	Ity	lty is the text sequence of four numbers from 1 to 9, for example: lty = “4241”.