superscript in r

To use superscript in R, you can follow these steps:

1. Use the expression() function to create an expression that includes the superscript text. For example, if you want to write "R^2", you would use expression(R^2).

2. Assign the expression to a variable, if desired. For example, you can assign the expression expression(R^2) to a variable named my_expression using the syntax my_expression <- expression(R^2).

3. To display the superscript text, you can use the plotmath package in R. Use the plotmath function plotmath() to render the expression with superscript. For example, if you have assigned the expression expression(R^2) to the variable my_expression, you can use plotmath(my_expression) to display the superscripted text.

4. If you want to use the superscript text in a plot, you can use the expression() function directly within the plot. For example, if you want to display the superscripted text "R^2" as a label on the x-axis of a plot, you can use the expression() function within the xlab argument of the plot() function like this: plot(x, y, xlab = expression(R^2)).

Remember to replace "R^2" with the desired superscript text in the above examples to suit your specific needs.