Dette er en melding med flere deler i MIME-format.
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And some more informastion I forgot.
R does not crash if I write out the formula:
set.seed(123)
x1 <- runif(1000)
x2 <- runif(1000)
x3 <- runif(1000)
x4 <- runif(1000)
x5 <- runif(1000)
x6 <- runif(1000)
x7 <- runif(1000)
x8 <- runif(1000)
y <- rnorm(1000)
fit <- lm(y~(x1*x2*x3*x4*x5*x6*x7*x8)^2)
-> R crashes
fit <- lm(y~x1+x2+x3+x4+x5+x6+x7+x8
+x1:x2+x1:x3+x1:x4+x1:x5+x1:x6+x1:x7+x1:x8
+x2:x3++x2:x4+x2:x5+x2:x6+x2:x7+x2:x8
+x3:x4+x3:x5+x3:x6+x3:x7+x3:x8
+x4:x5+x4:x6+x4:x7+x4:x8
+x5:x6+x5:x7+x5:x8
+x6:x7+x6:x8
+x7:x8)
-> R does not crash
This is the same formula, at least it should be.
Uwe Ligges <[EMAIL PROTECTED]>
05.10.2005 12:13
Til: Prof Brian Ripley <[EMAIL PROTECTED]>
cc: [EMAIL PROTECTED], [EMAIL PROTECTED]
Emne: Re: [Rd] R crashes for large formulas in lm() (PR#8180)
Prof Brian Ripley wrote:
> On Wed, 5 Oct 2005 [EMAIL PROTECTED] wrote:
>
>
>>Full_Name: Hallgeir Grinde
>>Version: 2.1.1
>>OS: Windows XP
>>Submission from: (NULL) (144.127.1.1)
>>
>>
>>While using lm(y~(x*z*c*...*v)^2) R crashes/closes if the numbers of
variables
>>are at least 8.
>
>
> OK, let's try to reproduce that:
>
>
>>x1 <- runif(1000)
>>x2 <- runif(1000)
>>x3 <- runif(1000)
>>x4 <- runif(1000)
>>x5 <- runif(1000)
>>x6 <- runif(1000)
>>x7 <- runif(1000)
>>x8 <- runif(1000)
>>y <- rnorm(1000)
>>fit <- lm(y~(x1*x2*x3*x4*x5*x6*x7*x8)^2)
>
>
> No crash, a quite reasonable fit.
>
> Can we please have a reproducible example, as we do ask?
>
Hmm, crashes for me as well with R-2.1.1 and R-2.2.0 beta (2005-09-27
r35682M) on WinNT 4.0, SP6.
Let's make it reproducible:
set.seed(123)
x1 <- runif(1000)
x2 <- runif(1000)
x3 <- runif(1000)
x4 <- runif(1000)
x5 <- runif(1000)
x6 <- runif(1000)
x7 <- runif(1000)
x8 <- runif(1000)
y <- rnorm(1000)
fit <- lm(y~(x1*x2*x3*x4*x5*x6*x7*x8)^2)
Uwe Ligges
NOTICE
Please immediately e-mail back to sender
if you are not the intended recipient.
Thereafter delete the e-mail along with
any attachments without making copies.
Elkem reserves all rights of privilege,
confidentiality and copyright.
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<br><font size=2 face="sans-serif">And some more informastion I forgot.</font>
<br><font size=2 face="sans-serif">R does not crash if I write out the
formula:</font>
<br>
<br><font size=2><tt>set.seed(123)<br>
x1 <- runif(1000)<br>
x2 <- runif(1000)<br>
x3 <- runif(1000)<br>
x4 <- runif(1000)<br>
x5 <- runif(1000)<br>
x6 <- runif(1000)<br>
x7 <- runif(1000)<br>
x8 <- runif(1000)<br>
y <- rnorm(1000)<br>
fit <- lm(y~(x1*x2*x3*x4*x5*x6*x7*x8)^2)</tt></font>
<br><font size=2><tt>-> R crashes</tt></font>
<br>
<br><font size=2><tt>fit <- lm(y~x1+x2+x3+x4+x5+x6+x7+x8</tt></font>
<br><font size=2><tt>
+x1:x2+x1:x3+x1:x4+x1:x5+x1:x6+x1:x7+x1:x8</tt></font>
<br><font size=2><tt>
+x2:x3++x2:x4+x2:x5+x2:x6+x2:x7+x2:x8</tt></font>
<br><font size=2><tt>
+x3:x4+x3:x5+x3:x6+x3:x7+x3:x8</tt></font>
<br><font size=2><tt>
+x4:x5+x4:x6+x4:x7+x4:x8</tt></font>
<br><font size=2><tt>
+x5:x6+x5:x7+x5:x8</tt></font>
<br><font size=2><tt>
+x6:x7+x6:x8</tt></font>
<br><font size=2><tt>
+x7:x8)</tt></font>
<br><font size=2><tt>-> R does not crash</tt></font>
<br><font size=2><tt>This is the same formula, at least it should
be.</tt></font>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td>
<td><font size=1 face="sans-serif"><b>Uwe Ligges <[EMAIL
PROTECTED]></b></font>
<p><font size=1 face="sans-serif">05.10.2005 12:13</font>
<td><font size=1 face="Arial"> </font>
<br><font size=1 face="sans-serif"> Til:
Prof Brian Ripley <[EMAIL PROTECTED]></font>
<br><font size=1 face="sans-serif"> cc:
[EMAIL PROTECTED], [EMAIL PROTECTED]</font>
<br><font size=1 face="sans-serif"> Emne:
Re: [Rd] R crashes for large formulas
in lm() (PR#8180)</font></table>
<br>
<br>
<br><font size=2><tt>Prof Brian Ripley wrote:<br>
<br>
> On Wed, 5 Oct 2005 [EMAIL PROTECTED] wrote:<br>
> <br>
> <br>
>>Full_Name: Hallgeir Grinde<br>
>>Version: 2.1.1<br>
>>OS: Windows XP<br>
>>Submission from: (NULL) (144.127.1.1)<br>
>><br>
>><br>
>>While using lm(y~(x*z*c*...*v)^2) R crashes/closes if the numbers
of variables<br>
>>are at least 8.<br>
> <br>
> <br>
> OK, let's try to reproduce that:<br>
> <br>
> <br>
>>x1 <- runif(1000)<br>
>>x2 <- runif(1000)<br>
>>x3 <- runif(1000)<br>
>>x4 <- runif(1000)<br>
>>x5 <- runif(1000)<br>
>>x6 <- runif(1000)<br>
>>x7 <- runif(1000)<br>
>>x8 <- runif(1000)<br>
>>y <- rnorm(1000)<br>
>>fit <- lm(y~(x1*x2*x3*x4*x5*x6*x7*x8)^2)<br>
> <br>
> <br>
> No crash, a quite reasonable fit.<br>
> <br>
> Can we please have a reproducible example, as we do ask?<br>
> <br>
<br>
Hmm, crashes for me as well with R-2.1.1 and R-2.2.0 beta (2005-09-27 <br>
r35682M) on WinNT 4.0, SP6.<br>
<br>
<br>
Let's make it reproducible:<br>
<br>
set.seed(123)<br>
x1 <- runif(1000)<br>
x2 <- runif(1000)<br>
x3 <- runif(1000)<br>
x4 <- runif(1000)<br>
x5 <- runif(1000)<br>
x6 <- runif(1000)<br>
x7 <- runif(1000)<br>
x8 <- runif(1000)<br>
y <- rnorm(1000)<br>
fit <- lm(y~(x1*x2*x3*x4*x5*x6*x7*x8)^2)<br>
<br>
<br>
Uwe Ligges<br>
</tt></font>
<br><FONT SIZE=3><BR>
<BR>
NOTICE<BR>
Please immediately e-mail back to sender <BR>
if you are not the intended recipient. <BR>
<BR>
Thereafter delete the e-mail along with <BR>
any attachments without making copies. <BR>
<BR>
Elkem reserves all rights of privilege, <BR>
confidentiality and copyright.<BR>
</FONT>
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