EDGEFIT

Name

edgefit

Purpose

Fit an edge between two signal levels

Description

Calling Sequence

edgefit,x,y,err,xedge,xedgesig

Inputs

x - independent variable (vector)
y - dependent variable (vector)
err - uncertainties on y

Optional Input Parameters

Keyword Input Parameters

Outputs

Two plots are generated and the fitted values are printed to the screen.
xedge - 3 element vector:
0 - signal level on the left of the edge
1 - signal level on the right of the edge
2 - the x value of where the edge is
xedgesig - 1-sigma uncertainty on the values in xedge

Keyword Output Parameters

Common Blocks

Side Effects

Restrictions

Assumes data are strictly uniform in x (spacing does not vary).

Procedure

Modification History

1996/12/23, Written by Marc W. Buie, Lowell Observatory
2017/01/19, MWB, many rewrites, may sort of work now but still a bit
fragile or non-general. Use with extreme caution.