# Output (simulation)

Tornado charts. Tornado charts are bar charts that display relationships between targets and simulated inputs using a variety of metrics.

- Correlation of target with input. This option creates a tornado chart of the correlation coefficients between a given target and each of its simulated inputs. This type of tornado chart does not support targets with a nominal or ordinal measurement level or simulated inputs with a categorical distribution.
- Contribution to variance. This option creates a tornado chart that displays 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.
- Sensitivity of target to change. This option creates a tornado chart that displays 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. 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.

Box plots of target distributions. Box plots are available for continuous targets. Select Overlay results from separate targets if your predictive model has multiple continuous targets and you want to display the box plots for all targets on a single chart.

Scatterplots of targets versus inputs. Scatterplots of targets versus simulated inputs are available for both continuous and categorical targets and include scatters of the target with both continuous and categorical inputs. Scatters involving a categorical target or a categorical input are displayed as a heat map.

Create a table of percentile values. For continuous targets, you can obtain a table of specified percentiles of the target distributions. Quartiles (the 25th, 50th, and 75th percentiles) divide the observations into four groups of equal size. If you want an equal number of groups other than four, select Intervals and specify the number. Select Custom percentiles to specify individual percentiles--for example, the 99th percentile.

Descriptive statistics of target distributions. This option creates tables of descriptive statistics for continuous and categorical targets as well as for continuous inputs. For continuous targets the table includes the mean, standard deviation, median, minimum and maximum, confidence interval of the mean at the specified level, and the 5th and 95th percentiles of the target distribution. For categorical targets the table includes the percentage of cases that fall in each category of the target. For categorical targets of PMML models, the table also includes the mean probability of each category of the target. For continuous inputs, the table includes the mean, standard deviation, minimum and maximum.

Correlations and contingency table for inputs. This option displays a table of correlation coefficients between simulated inputs. When inputs with categorical distributions are generated from a contingency table, the contingency table of the data that are generated for those inputs is also displayed.

Simulated inputs to include in the output. By default, all simulated inputs are included in the output. You can exclude selected simulated inputs from output. This will exclude them from tornado charts, scatterplots and tabular output.

Limit ranges for continuous targets. You can specify the range of valid values for one or more continuous targets. Values outside of the specified range are excluded from all output and analyses associated with the targets. To set a lower limit, select Lower in the Limit column and enter a value in the Minimum column. To set an upper limit, select Upper in the Limit column and enter a value in the Maximum column. To set both a lower and an upper limit, select Both in the Limit column and enter values in the Minimum and Maximum columns.

Display Formats. You can set the format used when displaying values of targets and inputs (both fixed inputs and simulated inputs).