How to use par() in R

par() is a function in R that allows you to modify and customize the graphical parameters of a plot. It is used to set various parameters such as the size of the plot, the color of the axes, the position of the labels, and many more.

Here is a step-by-step explanation of how to use the par() function in R:

Step 1: Call the par() function without any arguments to see the current graphical parameters. This will display a list of the current settings for the graphical parameters.

Step 2: To modify a specific graphical parameter, you can pass arguments to the par() function. For example, if you want to change the color of the axes, you can use the argument col.axis. To change the color to red, you can use the following code: par(col.axis = "red").

Step 3: You can also modify multiple graphical parameters at once by passing a list of arguments to the par() function. For example, if you want to change the size of the plot and the color of the axes, you can use the following code: par(cex = 1.5, col.axis = "red"). In this example, the cex argument is used to set the size of the plot.

Step 4: Some graphical parameters have predefined values, while others can take a range of values. You can check the documentation or use the help() function to see the available options for each parameter. For example, if you want to see the available options for the col.axis parameter, you can use the following code: help(par).

Step 5: After modifying the graphical parameters, you can create a plot using the modified settings. The plot() function will use the current graphical parameters set by the par() function.

Step 6: You can reset the graphical parameters to their default values by calling the par() function without any arguments. This will revert the graphical parameters back to their original settings.

That's it! These are the basic steps for using the par() function in R to modify and customize the graphical parameters of a plot. Remember to refer to the documentation or use the help() function for more information on the available graphical parameters and their options.