[R] Point and click

[(Ted Harding)]

On 04-Oct-03 Cliff Lunneborg wrote:
> The following query raises the question: What is it that students learn
> from point and click dialogs?"

Two things, I think.

1. How not to think.
2. How to be unaware of possible error.

Maybe others.

Ted.

> 
> Date: Fri, 03 Oct 2003 16:57:42 -0400
> From:
> To: s-news at lists.biostat.wustl.edu
> Subject: Splus question
> Message-ID: <BAY9-F52Q7OoK42LpqI000238f3 at hotmail.com>
> 
> I don't know if this is the right list to post this question. If not,
> please let me know where I should post this. I have a dataframe with 3
> variables: ID, Y, Group Group is either 1, 2, 3. I am trying to run a
> t-test to compare the three groups on outcome Y. I know how to do this
> using the point and click dialogs. But can't get it to work on the
> command line. When I type: t.test(y, group)  it just compares y and
> group
> as though they represent the two samples. I tried doing something with
> tapply(y, group) but don't know how that works. If someone knows,
> please
> email me. Thanks.
> 
> **********************************************************
> Cliff Lunneborg, Professor Emeritus, Statistics &
> Psychology, University of Washington, Seattle
> cliff at ms.washington.edu
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help

--------------------------------------------------------------------
E-Mail: (Ted Harding) <Ted.Harding at nessie.mcc.ac.uk>
Fax-to-email: +44 (0)870 167 1972
Date: 04-Oct-03                                       Time: 20:20:29
------------------------------ XFMail ------------------------------