Query regarding linking R with Matlab
[Forwarding to r-help for completeness. /Henrik] ---------- Forwarded message ---------- From: Henrik Bengtsson <hb at stat.berkeley.edu> Date: Dec 28, 2006 9:45 PM Subject: Re: [R] Query regarding linking R with Matlab To: kalyansikha at yahoo.com Hi.
On 12/28/06, Bhanu Kalyan.K <kalyansikha at yahoo.com> wrote:
Respected Sir, I am sorry that i forgot to 'setVerbose'. Now when that is set, The result is:
Matlab$startServer(minimize=FALSE)
[1] 0
matlab <- Matlab(host="localhost")
open(matlab)
[1] TRUE
setVerbose(matlab, -2)
res <- evaluate(matlab, "A=1+2;", "B=ones(2,20);")
Sending expression on the Matlab server to be evaluated...: 'A=1+2; B=ones(2,20);' Received an 'OK' reply (0) from the Matlab server. Evaluated expression on the Matlab server with return code 0.
res
NULL
close(matlab)
Closing connection to host 'localhost' (port 9999)... Received an 'OK' reply (0) from the Matlab server. Closing connection to host 'localhost' (port 9999)...done What should "res" object contain finally when we are doing res <- evaluate(matlab, "A=1+2;", "B=ones(2,20);") ??
The return value of evaluate() is NULL when successful (I noticed the help is saying '0'; I've corrected that for the next version). Anyway, 'res' contains nothing of interest. If there is any error on the Matlab side, an error is thrown in R giving you the details. What you might want to do is: data <- getVariable(matlab, "A") str(data)
once i do close(matlab), the matlab server is shutdown,
Yes, the server script is shut down, but Matlab is left running on purpose so you have a chance to continue working with the Matlab session by hand.
However, when i ask for the
values of A & B in matlab window, the output is displayed correctly. The
matlab window outputs thus:
? A
A =
3
? B
B =
Columns 1 through 17
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1
Columns 18 through 20
1 1 1
1 1 1
What do you interpret?
That everything is now working as expected. See the example of help(Matlab) to get more ideas how to interact with Matlab from R. Cheers Henrik
Kindly let me know Regards Bhanu Kalyan K Bhanu Kalyan K BTech CSE Final Year reach4kalyan at gmail.com Tel :+91-9885238228
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