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R Plotting

Plot

The plot() function is used to draw points (marks) in a drawing.

The function takes parameters to specify points in a drawing.

Parameter 1 specifies points in x-axis.

Parameter 2 specifies points on the y-axis.

For its simplicity, you can use the plot() function to arrange two numbers against each other:

Example

Draw one point in the diagram, at position (1) and position (3):

Result

To draw additional points, use vectors:

Example

Draw two points in the diagram, one at position (1, 3) and one in position (8, 10):

Result

Multiple Points

You can edit as many points as you like, just make sure you have the same number of points on both axis:

Example

Result

For better organization, if you have a lot of values, it is best to use a variable:

Example

Result

Sequence of Points

If you want to draw dots in sequence, for both x-axis and y-axis, use : operator:

Example

Result

Draw a Line

The plot() function also takes a type of parameter with the value l of drawing a line to connect all the points in a drawing:

Example

Result

Plot Labels

The plot() function also accepts other parameters, such as main, xlab and ylab if you want to customize the graph with the main heading and the different x and y axis labels:

Example

Result

Graph Apperance

There are many other parameters you can use to change the look of the points.

Colors

Use col = "color" to add color to points:

Example

Result

Size

Use cex = number to change point size (1 is default, and 0.5 means 50% less, and 2 means 100% greater):

Example

Result

Point Shape

Use a pch with a value from 0 to 25 to change the format of the point:

Example

Result

Pch parameter values ​​range from 0 to 25, which means we can choose up to 26 different types of points:

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