Re: [R] timing a function
Thank you Alexander
2010/5/17 Alexander Shenkin ashen...@ufl.edu
You could also put the call to system.time inside the function itself:
f = function(x) {
system.time({
... #function's code
ret_val = ...
}); flush.console();
return ret_val;
}
i s'pose you'd miss out on the time taken to jump to the function code,
return the value, etc, but for functions that are heavy at all, that
wouldn't trip you up.
allie
On 5/17/2010 2:06 PM, Barry Rowlingson wrote:
On Mon, May 17, 2010 at 6:24 PM, Peter Ehlers ehl...@ucalgary.ca
wrote:
Try
system.time(y - f(x))
and see ?=.
-Peter Ehlers
Ah ha. That explains the curly brackets I saw in a posting with
system.time on stack overflow just now:
system.time({y=f(x)})
works as expected since the {} pair make a new code block. Also you
can then time more than one statement:
system.time({y=f(x);z=g(y)})
- gives the total time for f(x) and g(y).
Barry
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Re: [R] timing a function
Dear all,
Just one last question. There seems to be no problem in writing
z = system.time(y - f(x))
or
z - system.time(y - f(x))
Then z contains the named vector of the elapsed times, and y the value of
the function f(x).
Am I right ?
Thank you very much,
Gustave
2010/5/17 Alexander Shenkin ashen...@ufl.edu
You could also put the call to system.time inside the function itself:
f = function(x) {
system.time({
... #function's code
ret_val = ...
}); flush.console();
return ret_val;
}
i s'pose you'd miss out on the time taken to jump to the function code,
return the value, etc, but for functions that are heavy at all, that
wouldn't trip you up.
allie
On 5/17/2010 2:06 PM, Barry Rowlingson wrote:
On Mon, May 17, 2010 at 6:24 PM, Peter Ehlers ehl...@ucalgary.ca
wrote:
Try
system.time(y - f(x))
and see ?=.
-Peter Ehlers
Ah ha. That explains the curly brackets I saw in a posting with
system.time on stack overflow just now:
system.time({y=f(x)})
works as expected since the {} pair make a new code block. Also you
can then time more than one statement:
system.time({y=f(x);z=g(y)})
- gives the total time for f(x) and g(y).
Barry
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.htmlhttp://www.r-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide
http://www.R-project.org/posting-guide.htmlhttp://www.r-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[[alternative HTML version deleted]]
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Re: [R] timing a function
Dear all, I have a function f(x). ptm - proc.time() y=f(x) proc.time() - ptm works fine for me. However it is not possible to write system.time(y=f(x)) and system.time(f(x)) does not store the value of f(x). Should I prefer the 3 lines with proc.time ? Thank you very much, Gustave 2010/5/4 Joris Meys jorism...@gmail.com ?system.time can help too. On Tue, May 4, 2010 at 11:07 PM, pdb ph...@philbrierley.com wrote: Hi, I want to time how long a function takes to execute. Any clues on what to search for to achieve this? Thanks in advance. -- View this message in context: http://r.789695.n4.nabble.com/timing-a-function-tp2126319p2126319.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Joris Meys Statistical Consultant Ghent University Faculty of Bioscience Engineering Department of Applied mathematics, biometrics and process control Coupure Links 653 B-9000 Gent tel : +32 9 264 59 87 joris.m...@ugent.be --- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list 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.
Re: [R] timing a function
On Mon, May 17, 2010 at 6:24 PM, Peter Ehlers ehl...@ucalgary.ca wrote:
Try
system.time(y - f(x))
and see ?=.
-Peter Ehlers
Ah ha. That explains the curly brackets I saw in a posting with
system.time on stack overflow just now:
system.time({y=f(x)})
works as expected since the {} pair make a new code block. Also you
can then time more than one statement:
system.time({y=f(x);z=g(y)})
- gives the total time for f(x) and g(y).
Barry
__
R-help@r-project.org mailing list
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.
Re: [R] timing a function
Thank you Bill, Peter and Barry.
2010/5/17 Barry Rowlingson b.rowling...@lancaster.ac.uk
On Mon, May 17, 2010 at 6:24 PM, Peter Ehlers ehl...@ucalgary.ca wrote:
Try
system.time(y - f(x))
and see ?=.
-Peter Ehlers
Ah ha. That explains the curly brackets I saw in a posting with
system.time on stack overflow just now:
system.time({y=f(x)})
works as expected since the {} pair make a new code block. Also you
can then time more than one statement:
system.time({y=f(x);z=g(y)})
- gives the total time for f(x) and g(y).
Barry
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
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.
Re: [R] timing a function
You could also put the call to system.time inside the function itself:
f = function(x) {
system.time({
... #function's code
ret_val = ...
}); flush.console();
return ret_val;
}
i s'pose you'd miss out on the time taken to jump to the function code,
return the value, etc, but for functions that are heavy at all, that
wouldn't trip you up.
allie
On 5/17/2010 2:06 PM, Barry Rowlingson wrote:
On Mon, May 17, 2010 at 6:24 PM, Peter Ehlers ehl...@ucalgary.ca wrote:
Try
system.time(y - f(x))
and see ?=.
-Peter Ehlers
Ah ha. That explains the curly brackets I saw in a posting with
system.time on stack overflow just now:
system.time({y=f(x)})
works as expected since the {} pair make a new code block. Also you
can then time more than one statement:
system.time({y=f(x);z=g(y)})
- gives the total time for f(x) and g(y).
Barry
__
R-help@r-project.org mailing list
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.
__
R-help@r-project.org mailing list
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.
[R] timing a function
Hi, I want to time how long a function takes to execute. Any clues on what to search for to achieve this? Thanks in advance. -- View this message in context: http://r.789695.n4.nabble.com/timing-a-function-tp2126319p2126319.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list 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.
Re: [R] timing a function
Hi, ? proc.time() for more help regards Ml pdb ph...@philbrierley.com a écrit : Hi, I want to time how long a function takes to execute. Any clues on what to search for to achieve this? Thanks in advance. -- View this message in context: http://r.789695.n4.nabble.com/timing-a-function-tp2126319p2126319.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list 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. __ R-help@r-project.org mailing list 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.
Re: [R] timing a function
?system.time can help too. On Tue, May 4, 2010 at 11:07 PM, pdb ph...@philbrierley.com wrote: Hi, I want to time how long a function takes to execute. Any clues on what to search for to achieve this? Thanks in advance. -- View this message in context: http://r.789695.n4.nabble.com/timing-a-function-tp2126319p2126319.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list 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. -- Joris Meys Statistical Consultant Ghent University Faculty of Bioscience Engineering Department of Applied mathematics, biometrics and process control Coupure Links 653 B-9000 Gent tel : +32 9 264 59 87 joris.m...@ugent.be --- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php [[alternative HTML version deleted]] __ R-help@r-project.org mailing list 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.
