PLOTSN

Name

plotsn

Purpose

Analyze a vector and retrieve the signal-to-noise ratio.

Description

First, fit a polynomial to the data, subtract the polynomial and
add the mean of the polynomial to flatten the data.
Compute the mean and standard deviation in the flattened data.

Calling Sequence

plotsn,point1,point2,x,y,label

Inputs

point1 = First data point to use from x and y.
point2 = Last data point to use from x and y.
x = 1-d vector containing independent variable.
y = 1-d vector containing dependent variable.
label = String title for plot.

Outputs

None

Revision History

Written by Marc Buie on 2/27/91

Comments

A single number for the SNR is somewhat dubious if the data spans
a wide numeric value.