[R] Creating nice looking lists: how?

[Charles C. Berry]

On Fri, 28 Sep 2007, Sergey Goriatchev wrote:

> Hello,
>
> For my functions I want to create output similar in appearance to that
> of what you get when you print a summary of lm model:
>
> Residuals:
>      Min        1Q         Median        3Q           Max
> -0.209209 -0.043133  0.001793  0.044105  0.234750
>
> Coefficients:
>                 Estimate  Std. Error  t value    Pr(>|t|)
> (Intercept)  0.981762   0.004089 240.103  < 2e-16 ***
> Factor 1    -0.009581   0.006381  -1.501 0.134296
> Factor 2    -0.008993   0.009182  -0.979 0.328163
> Factor 3     0.029960   0.009547   3.138 0.001866 **
> Factor 4    -0.026575   0.007370  -3.606 0.000363 ***
> Factor 5    -0.004847   0.006382  -0.760 0.448138
> Factor 6     0.005099   0.006483   0.786 0.432202
> ---
> Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
>
> I want:
> 1) no $ before the list component names
> 2) component names that take values from outside variables
> (ex.: number <- 10
>       There are 'number' factors in the model:)
>
> There is not much information on how to create nice output in terms of
> lists, so I was looking for core to write the summary(lm) output, but
> could not find much. Obviously, I can type summary.lm, but it does not
> show how to create the name "Coefficients:"

 	page( stats:::print.summary.lm, 'print' )

is what you want.

It is called when auto-printing class "summary.lm" objects.

Some print methods for summary methods do a lot of calculation, and I 
sometimes find it confusing that those calculations are not included in 
the summary nethod and spend a lot of time searching thru summary.whatnot 
till I wake up and remember to look at print.summary.whatnot.

Chuck

>
> Could someone give me pointers on how to create nice lists?
>
> Thanks
> Sergey
>
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>

Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901