Re: make scatter plot and regression

[Mary Quinton <quintonmary@xxxxxxxxx>]

Hello Gao,
Yes you can do this.  Read the data into four
variables, say they are  a, b, c, and d.  Then the
scatter plot of two of them is made with

yes? plot/vs a, c

You can use /HLIMITS and /VLIMITS on the plot call to
make the axes any length you want.

If you have defined the axis for the data as a time
axis, then the script regresst.jnl will define the
variables you need for the regression line. There is a
Ferret FAQ about how to use the regress scripts:

http://www.ferret.noaa.gov/Ferret/FAQ/analysis/regressions.html


--- Gao Rongzhen <gaorz@scsio.ac.cn> wrote:

> Hi, Dear All,
> 
> The attatched data file contains 4 colomns,
> representing four annual mean time series ranging
> from 1946 to 1992 .
> 
> Now i want to make a scatter plot and its linear
> regression line. For example, a is independent
> variable (x), and c is dependent variable (y).
> 
> Can ferret make it and how?
> 
> Thanks for any help.
> 
> Gao Rongzhen
> 


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