Error: Plotting error, empty plot

This error occurs when you attempt to have Maple draw a plot that has nothing in it (no points, curves or surfaces to be plotted). Here are some common ways that this can arise:

• The expression to be plotted is not defined, or its values are not real, for values of the independent variable(s) in the given interval(s).
• The expression to be plotted contains some additional parameters which have not been given numerical values.
• You are plotting an expression depending on a variable x , but did not use x as the name of the independent variable in the plot command.

Examples:

Expression with non-real values:

> plot(sqrt(x), x = -2 .. -1);

Plotting error, empty plot

Additional parameters:

> plot(x^2+y, x = 0 .. 1);

Plotting error, empty plot

Independent variable not specified:

> plot(x^2+1, 0 .. 1);

Plotting error, empty plot

Maple Advisor Database R. Israel 1997