Regression - Diagnostic - StandardRPlot - Goodness of Fit

Produces a scatterplot of target outcomes (x-axis) versus fitted values (y-axis). The Spearman's rank correlation coefficient is shown. A high correlation indicates that fitted values are ranked in a similar order to target outcomes. Points should be randomly scattered around a 45 degree line through the origin.

Options

Regression An R Output containing a regression analysis.

Maximum points The maximum number of points to plot. If the object contains more data points, a random sample is taken.

Code

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var heading_text = "Goodness of Fit";
if (!!form.setObjectInspectorTitle)
    form.setObjectInspectorTitle(heading_text);
else
    form.setHeading(heading_text);

form.dropBox({ name: "formInput", label: "Regression:", types: ["RItem:Regression"],
    prompt: "Select a Regression output to plot fitted values for" });
form.numericUpDown({ name: "formMaxPoints", label: "Maximum points", default_value: 1000,
    increment: 1, minimum: 2, maximum: Number.MAX_SAFE_INTEGER, prompt: "The maximum number of observations to plot" });

library(flipRegression)
goodness.of.fit <- GoodnessOfFitPlot(formInput, max.points = formMaxPoints)