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R.matlab question

4 messages · Aimin Yan, Henrik Bengtsson

Aimin Yan
# 
Does anyone know how to solve this question about R.matlab?
I am in windowsXP, my matlab is matlab 7.0.0 19920(R14)

thanks,

Aimin

 > matlab <- Matlab(host="localhost", port=9998)
 > if (!open(matlab)) throw("Matlab server is not running: waited 30 seconds.")
Error in list("throw("Matlab server is not running: waited 30 seconds.")" = 
<environment>,  :

[2006-12-17 22:26:03] Exception: Matlab server is not running: waited 30 
seconds.
   at throw(Exception(...))
   at throw.default("Matlab server is not running: waited 30 seconds.")
   at throw("Matlab server is not running: waited 30 seconds.")
In addition: There were 30 warnings (use warnings() to see them)
 > warnings
function (...)
UseMethod("warnings")
 > warnings()
Warning messages:
1: localhost:9998 cannot be opened
2: localhost:9998 cannot be opened
3: localhost:9998 cannot be opened
4: localhost:9998 cannot be opened
5: localhost:9998 cannot be opened
6: localhost:9998 cannot be opened
7: localhost:9998 cannot be opened
8: localhost:9998 cannot be opened
9: localhost:9998 cannot be opened
10: localhost:9998 cannot be opened
11: localhost:9998 cannot be opened
12: localhost:9998 cannot be opened
13: localhost:9998 cannot be opened
14: localhost:9998 cannot be opened
15: localhost:9998 cannot be opened
16: localhost:9998 cannot be opened
17: localhost:9998 cannot be opened
18: localhost:9998 cannot be opened
19: localhost:9998 cannot be opened
20: localhost:9998 cannot be opened
21: localhost:9998 cannot be opened
22: localhost:9998 cannot be opened
23: localhost:9998 cannot be opened
24: localhost:9998 cannot be opened
25: localhost:9998 cannot be opened
26: localhost:9998 cannot be opened
27: localhost:9998 cannot be opened
28: localhost:9998 cannot be opened
29: localhost:9998 cannot be opened
30: localhost:9998 cannot be opened
 >
Henrik Bengtsson
# 
Hi.
On 12/20/06, Aimin Yan <aiminy at iastate.edu> wrote:
[snip]
This could be because your firewall is blocking R from connecting
to Matlab.  Try a few different port numbers.  I recently learned that
the current default port in R.matlab might not be the best one;
different port intervals are reserved for different purposes, cf.
http://www.iana.org/assignments/port-numbers.  That document indicates
that a port number in [49152, 65535] might be better.  See if this
helps.  Does someone else knowof a port interval that is more likely
to work in general?

You can also tell the Matlab object to report more details what it is
trying to do by setting the verbosity threshold, i.e.
setVerbose(matlab, threshold=-1); the lower the threshold the more
details you'll see.

Cheers

Henrik
7 days later
Henrik Bengtsson
# 
Hi,

a follow up after realizing that you might not have started the Matlab
application to listen on port 9998.  Try:

Matlab$startServer(port=9998)

and then

matlab <- Matlab(host="localhost", port=9998)
if (!open(matlab)) throw("Matlab server is not running: waited 30 seconds.")

Does this help?

Henrik
On 12/20/06, Henrik Bengtsson <hb at stat.berkeley.edu> wrote:
Aimin Yan
# 
I am appreciated that you still remember my question.
I try this one, it works now.
thank you very, very much.

Aimin
At 08:19 PM 12/27/2006, Henrik Bengtsson wrote: