Displaying 5 results from an estimated 5 matches for "trimrepeat".
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trimrepeats
2016 Feb 26
2
[patch] Support many columns in model.matrix
Generating a model matrix with very large numbers of columns overflows
the stack and/or runs very slowly, due to the implementation of
TrimRepeats().
This patch modifies it to use Rf_duplicated() to find the duplicates.
This makes the running time linear in the number of columns and
eliminates the recursive function calls.
Thanks
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2016 Feb 29
1
[patch] Support many columns in model.matrix
...via R-devel <r-devel at r-project.org>
>>>>>> on Fri, 26 Feb 2016 15:58:20 -0800 writes:
>
> > Generating a model matrix with very large numbers of
> > columns overflows the stack and/or runs very slowly, due
> > to the implementation of TrimRepeats().
>
> > This patch modifies it to use Rf_duplicated() to find the
> > duplicates. This makes the running time linear in the
> > number of columns and eliminates the recursive function
> > calls.
>
> Thank you, Karl.
> I've committed this (v...
2016 Feb 29
0
[patch] Support many columns in model.matrix
...gt;>> Karl Millar via R-devel <r-devel at r-project.org>
>>>>> on Fri, 26 Feb 2016 15:58:20 -0800 writes:
> Generating a model matrix with very large numbers of
> columns overflows the stack and/or runs very slowly, due
> to the implementation of TrimRepeats().
> This patch modifies it to use Rf_duplicated() to find the
> duplicates. This makes the running time linear in the
> number of columns and eliminates the recursive function
> calls.
Thank you, Karl.
I've committed this (very slightly modified) to R-devel,
(a...
2012 Aug 09
4
debug vs regular mode
Dear all,
I had a R segmentation fault, and then invoked debug mode and ran step
by step.
When I reached "terms(Y~X1*X2*...*X16)", I would then have
"segmentation" fault. However, if I just ran this under regular "R
interactive" mode, it would be fine though taking long time.
My questions are:
1. Is there a known limit of terms for a formula?
2. Why does the
2012 Aug 09
4
debug vs regular mode
Dear all,
I had a R segmentation fault, and then invoked debug mode and ran step
by step.
When I reached "terms(Y~X1*X2*...*X16)", I would then have
"segmentation" fault. However, if I just ran this under regular "R
interactive" mode, it would be fine though taking long time.
My questions are:
1. Is there a known limit of terms for a formula?
2. Why does the