The structure of a formula should always look like the following:

GRAPH “formula name” (unit) = formula

Or:

GRAPH “formula name” = formula (if (unit) is left out no graph will be plotted but the values are calculated, for use in other formulas for example.)

• GRAPH is a so-called keyword.
• “formula name” is how you wish to describe the formula
• formula is a mathematical expression that is constructed using operators, variables, etc.

You can create a formula by clicking on the desired operator, variable, etc, in the menu to the left, or you can write it by hand.

If you choose to write it by hand, consider the following:

• Functions, operators, etc, has to be written in CAPITAL letters
• Formula names that contains spaces has to be market “by quotes”
• Variables has to be entered exactly as they appear in the variable list