We need to import the data series by converting the text file cfc11.dat to a binary Vensim data file (cfc11.vdf).
| Ø | Select the menu Model>from .dat format…. Choose the file cfc11.dat and click Open. |
You should get the message "Dat2vdf completed without error" and an Output window will show that a number of values were written for atmospheric CFC 11 releases and for time base Time. The dataset cfc11.vdf is loaded as the first dataset. Analysis tools will now work on this dataset.
| Ø | Click OK to the message box and close the Output window. |
| Ø | Open the Control Panel and click the Datasets tab, double click on the previous simulation dataset base to remove it, leaving only the dataset cfc11. |
| Ø | Double click the variable atmospheric CFC 11 releases to select it as the Workbench Variable and then click on the Graph tool. |
A graph is displayed for atmospheric CFC 11 releases over the time base of the dataset.
| Ø | Close the graph by clicking the Close button or pressing Del. |
Notice that this output runs only through 1992. The projected releases were not included in the input dataset.
