# International Futures Help System

## Create Differentiation in Forecasts for History and Forecast

This feature of IFs allows users to create formulas of variables that allow transferability between variables that are either historic and forecasted or variables that are both forecasted. This feature of IFs is similar to Create Historic Analog with Forecast, but offers users more flexibility by allowing them to work with two forecast variables. Select this option and a new window will appear asking you to choose between Computation History or Computation Forecast.

**Computation History**: Selecting this will present a new window that will ask you to input a formula. Your formula can be as simple as one letter, as can be seen by reading the Create Historic Analog with Forecast help topic.

**Type your Formula**: In the box, type in a formula you would like IFs to calculate. After typing in this formula, click Enter. This will bring up a new window. From this window, you can accomplish the following:

**Formula Name**: Type in the formula name you would like.

**Name**: Type in the formula name you would like.

**Units Name**: Type in the Units Name you would like.

After you have typed in the names you prefer, click Enter: This will bring you back to the Type your Formula window.

The variables you used in your formula are now displayed at the bottom of the screen in the left column: Now, click on Select Vars. You will return to the Full Variable/Parameter Selection window where you will select a variable.

After you have selected the variables you want, click Exit: You will then return to the Type your Formula menu. The variable/parameter you have chosen to incorporate a formula into will be labeled.

**Computation Forecast**: Selecting this will present a new window that will ask you to input a formula. From here you can accomplish the following:

**Type your Formula**: In the box, type in a formula you would like IFs to calculate. After typing in this formula, click Enter. This will bring up a new window. From this window, you can accomplish the following:

**Formula Name**: Type in the formula name you would like.

**Dimension Name**: Type in the formula name you would like.

**Units Name**: Type in the Units Name you would like.

After you have typed in the names you prefer, click Enter: This will bring you back to the Type your Formula window.

The variables you used in your formula are now displayed at the bottom of the screen in the left column: Now, click on Select Vars. You will return to the Full Variable/Parameter Selection window where you will select a variable.

After you have selected the variables you want, click Exit: You will then return to the Type your Formula menu. The variable/parameter you have chosen to incorporate a formula into will be labeled.