disttool (Statistics Toolbox)

Interactive graph of cdf (or pdf) for many probability distributions.

Syntax

disttool

Description

The disttool command sets up a graphic user interface for exploring the effects of changing parameters on the plot of a cdf or pdf. Clicking and dragging a vertical line on the plot allows you to evaluate the function over its entire domain interactively.

Evaluate the plotted function by typing a value in the x-axis edit box or dragging the vertical reference line on the plot. For cdfs, you can evaluate the inverse function by typing a value in the y-axis edit box or dragging the horizontal reference line on the plot. The shape of the pointer changes from an arrow to a crosshair when you are over the vertical or horizontal line to indicate that the reference line is draggable.

To change the distribution function choose from the pop-up menu of functions at the top left of the figure. To change from cdfs to pdfs, choose from the pop-up menu at the top right of the figure.

To change the parameter settings move the sliders or type a value in the edit box under the name of the parameter. To change the limits of a parameter, type a value in the edit box at the top or bottom of the parameter slider.

When you are done, press the Close button.