[R] How to capture the printout on the screen?

[Gang Chen]

Thanks a lot for the pointer!

After I downloaded the source code and saw the innards of the print
function, I know what to do now.

Thanks again,
Gang


On Wed, Jul 17, 2013 at 6:00 PM, Greg Snow <538280 at gmail.com> wrote:
> If you are happy with the character strings printed out then you can use the
> capture.output function.
>
> If you want the numbers (without needing to convert) then look at the print
> method for the class of object that you are working with and see what the
> code is.  It is probably calling another function to produce the output and
> you could just call that function directly.  If not, you can copy that
> section of the code into your own function to call and have it return the
> object rather than printing.
>
>
> On Wed, Jul 17, 2013 at 3:38 PM, Gang Chen <gangchen6 at gmail.com> wrote:
>>
>> This is most likely a silly question.
>>
>> First I run the following:
>>
>> require(car)
>> mod.ok <- lm(cbind(pre.1, pre.2, pre.3, pre.4, pre.5, post.1, post.2,
>> post.3, post.4, post.5,
>>                           fup.1, fup.2, fup.3, fup.4, fup.5) ~
>> treatment*gender, data=OBrienKaiser)
>> phase <- factor(rep(c("pretest", "posttest", "followup"), c(5, 5, 5)),
>> levels=c("pretest", "posttest", "followup"))
>> hour <- ordered(rep(1:5, 3))
>> idata <- data.frame(phase, hour)
>> (fm <- linearHypothesis(mod.ok, c("treatment1", "treatment2"),
>> idata=idata, idesign=~phase*hour, iterms="phase:hour"))
>>
>> I get the output like the following (only the last part at the end is
>> shown below):
>>
>> ...
>> Multivariate Tests:
>>                  Df test stat  approx F num Df den Df  Pr(>F)
>> Pillai            2 0.6623840 0.2475987     16      8 0.99155
>> Wilks             2 0.4460357 0.1864957     16      6 0.99668
>> Hotelling-Lawley  2 0.9988990 0.1248624     16      4 0.99904
>> Roy               2 0.5792977 0.2896488      8      4 0.93605
>>
>> I want to capture the data frame shown above, but it's not part of 'fm':
>>
>> str(fm)
>>
>> I guess the print method for an object of class "Anova.mlm"
>> ("print.Anova.mlm") generates the above data frame. My question is:
>> How to capture it? I mean, how can I store the output on the screen
>> and then extract the data frame?
>>
>> Thanks,
>> Gang
>>
>> ______________________________________________
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>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>
>
>
> --
> Gregory (Greg) L. Snow Ph.D.
> 538280 at gmail.com