TORNADO Subcommand (SIMRUN command)

The TORNADO subcommand generates tornado charts. Tornado charts are horizontal bar charts that display relationships between targets and simulated inputs using a variety of metrics.

DISPLAY. Controls whether tornado charts are displayed. The default is YES, which specifies that tornado charts are displayed.

TYPE Keyword

The TYPE keyword specifies the metrics for the tornado charts. Each specified metric generates a separate chart.

• CORR. Displays a tornado chart of the correlation coefficient between a target and its simulated inputs, and is the default tornado chart. This type of tornado chart does not support targets with a nominal or ordinal measurement level or simulated inputs with a categorical distribution.
• DELTASTDDEV(number). Displays a tornado chart of the effect on the target of modulating each simulated input by plus or minus a specified number of standard deviations of the distribution associated with the input. For example, DELTASTDDEV(0.5) displays the change in the target when the input changes by +/- 0.5 standard deviations. The multiplier must be a numeric value greater than 0 and less than or equal to 10. This type of tornado chart does not support targets with ordinal or nominal measurement levels, or simulated inputs with any of the following distributions: categorical, Bernoulli, binomial, Poisson, or negative binomial.
• VARIANCE. Displays a tornado chart of the contribution to the variance of a target from each of its simulated inputs, allowing you to assess the degree to which each input contributes to the overall uncertainty in the target. This type of tornado chart does not support targets with ordinal or nominal measurement levels, or simulated inputs with any of the following distributions: categorical, Bernoulli, binomial, Poisson, or negative binomial.