Quantile Regression: Display
This feature requires Custom Tables and Advanced Statistics.
The Display dialog provides output and plot control settings.
- The following output options are available.
- Parameter estimates
- Displays parameter estimates and corresponding test statistics and confidence intervals. You can optionally display exponentiated parameter estimates in addition to the raw parameter estimates.
- Covariance matrix for parameter estimates
- Displays the estimated parameter covariance matrix.
- Correlation matrix for parameter estimates
- Displays the estimated parameter correlation matrix.
- Plot and Tabulate
- The following plotting options are available:
- Plot the parameter estimates for
- You can select to plot parameter estimates for a specific number of top effects, or for all
effects in the model. Top xx effects setting controls the number of
categories, or combinations of categories in a mixed effect, that are plotted within the interaction
of one covariate and one or two factors. The value must be a single positive integer
(50 is the default setting).Notes:
- Prediction plots are created for all effects when the integer value you specify is larger than the number of categories or combinations.
- The setting is valid only when multiple values are specified for the Quantile values setting on the Criteria dialog. No plots are created when a single quantile value is specified.
- Display the predicted by observed plot
- Controls the creation of the predicted versus observed values plot. When enabled, a single plot that contains the points (with different colored dots representing different quantiles) is created. The setting is disabled by default.
- Predict the effects in the model
- When enabled, the following options are available:
- Plot or tabulate the top x effects
- Specify the number of top effects whose prediction plot or prediction table will be created. 3
is the default value.Note: The prediction plots or prediction tables are created for all effects when the specified value is larger than the number of valid effects in the model.
- Plot or tabulate user-specified effects
- Valid effect guidelines are:
- Effect with one covariate (including a high power of the covariate itself): Create a single plot containing the lines predicted by different quantiles.
- Effect with one factor: Tabulate the predictions for the categories of the factor by different quantiles.
- Effect with the interaction of two factors: For each quantile, tabulate the predictions for the categories of two factors.
- Effect with the interaction of one covariate and one or two factors: For each quantile, create a plot containing the lines for each category or combination of the categories within the interaction effect.
- The maximum number of the combinations to be plotted is controlled by the value specified for Plot maximum xx categories of combinations of categories in a mixed effect.
Effects that are moved from Model Effects to the Prediction Lines list are used for plotting. Plots are not created in cases where the specified effects are constant (removed from model building).
Effects that are moved from Model Effects to the Prediction Tables list are used for tabulation. Tables are not created in cases where the specified effects are constant (removed from model building).
- Plot maximum xx categories or combinations of categories in a mixed effect
- Controls the maximum number of the category combinations to plot. The default value is 10.