Displaying 20 results from an estimated 900 matches similar to: "Calling R functions into C# or C++"
2010 May 07
4
Use of R in C#
I have a C# program that requires the run of a logistic regression. I have downloaded the R 2.11 package, and have added the following references to my code:
STATCONNECTORCLNTLib;
StatConnectorCommonLib;
STATCONNECTORSRVLib;
In my code I have:
StatConnector scs = new STATCONNECTORSRVLib.StatConnectorClass();
scs.Init("R");
The init step returns the below error which seems to indicate
2006 Nov 24
1
Fwd: Dates Conversion/write.foreign
---------- Forwarded message ----------
From: Shubha Vishwanath Karanth <shubhak at ambaresearch.com>
Date: Nov 24, 2006 7:54 PM
Subject: Dates Conversion/write.foreign
To: Shubha Karanth <shubhakaranth at gmail.com>, Shubha Vishwanath
Karanth <shubhak at ambaresearch.com>
Hi R experts,
I need an urgent help...
I have an a dataframe caled idat. Below i give a snapshot
2008 May 24
1
Solving 100th order equation
Hi R,
I have a 100th order equation for which I need to solve the value for x. Is there a package to do this?
For example my equation is:
(x^100 )- (2*x^99) +(10*x^50)+.............. +(6*x ) = 4000
I have only one unknown value and that is x. How do I solve for this?
BR, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore *
2008 Nov 07
2
Mismatch in logical result?
Hi R,
I have certain checkings, which gives FALSE, but actually it is true. Why does this happen? Note that the equations that I am checking below are not even the case of recurring decimals...
> 1.4^2 == 1.96
[1] FALSE
> 1.2^3==1.728
[1] FALSE
Thanks in advance, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo *
2001 Aug 12
1
R (D)COM automation server for windows, type mismatch?
Hello!
I just started experimenting with the (D)COM automation server for R
(server version 0.99, R 1.3.0, Win NT)
All the precompiled sample executables work.
When I write programms myself, in this case Visual Basic for Applications
within Excel, I can attach a graphics device but not a character device.
The controls I added to the form by means of the 'toolbox' both originate
from
2008 Feb 06
1
wilderSum
Hi,
Can somebody tell me the formula for "?wilderSum" in TTR package? I mean how are these calculated?
BR, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain confidential and/or privileged i...{{dropped:13}}
2008 Sep 08
1
To find vector X under contraints
Hi R,
I have the variance-covariance matrix,
>V=matrix(c(0.011119238, 0.002407527, 0.002407527, 0.020739401),2,2)
I need to find a vector X=c(x1,x2), such that
1) X'VX is equal to a constant 2 (say) and
2) sum(x) should be equal to a another constant 1.5 (say).
How do we do this in R?
BR, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94
2008 May 06
2
To preserve the class "Matrix"
Hi,
Suppose
a=matrix(1:9,3,3)
> a
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
Now,
> class(a[1:2,])
[1] "matrix"
> class(a[1:3,])
[1] "matrix"
> class(a[,1:2])
[1] "matrix"
> class(a[,1:3])
[1] "matrix"
But,
> class(a[1,])
[1] "integer"
> class(a[,1])
[1]
2008 Jun 19
2
Comparison between R and MATLAB
Hi R,
Can I get a comparison between R and MATLAB? How is R efficient than MATLAB? Or what are the weaknesses of R compared to MATLAB?
Thank you very much for your help,
Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain confidential and/or
2008 May 13
2
Remove an object by the reference
Hi R,
A simple question, but don't know the answer...
x="a"
a=5
I need to remove the object "a" by using only x. something like rm(somefunction(x))...Is this possible?
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain
2008 May 13
3
Regular Expressions
Hi R,
Again struck with regular expressions...
Suppose,
S=c("World_is_beautiful", "one_two_three_four","My_book")
I need to extract the last but one element of the strings. So, my output should look like:
Ans=c("is","three","My")
gsub() can do this...but wondering how do I give the regular expression....
2010 May 11
1
Creating R exe files
Hi all,
Just like Fortran creates EXE files for a code, can R also do the same? Thanks for the info.
Thanks and Regards,
Shubha Karanth | Amba Research
Ph +91 80 3980 8283 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain confidential and/or privileged i...{{dropped:13}}
2008 Apr 09
11
Number of words in a string
Hi R,
A quick question: How do we find the number of words in a string?
Example:
C="Have a nice day"
And the number of words should be 4. any built in function or?...
Thanks, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain
2008 Feb 28
0
RMysql question
R users,
I have a problem in RMysql. The error I get is:
> library(RMySQL)
> library(RMySQL)
>options(expressions=10000)
> MySQL(max.con = 16, fetch.default.rec = 500, force.reload = FALSE)
Error: protect(): protection stack overflow
I have no idea of why the error is. Can anyone help on this?
Many Thanks,
Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980
2008 Jun 11
0
Polynomial Goal Programming
Hello R,
Is there a package to perform Polynomial goal programming in R?
BR, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain confidential and/or privileged i...{{dropped:13}}
2010 Jul 20
1
Transformation of Y changes the 'lm' object?
Hi R,
This is a problem, which I have tried to present in a simple way:
Let,
x1=1:10
x2=2:11
y=2+3*x1
lm_obj=lm(y~x1+x2)
lm_obj
step(lm_obj) # Step function for the first time
y=y^0.1
lm_obj
step(lm_obj) #Step function after a transformation on Y, but 'lm_obj' is not modified.
The two step function behave differently. The first one is before the
2009 Jan 07
1
problem with initialising R-Project through C#
Hi,
i got a problem with initialising R-Project from C#
in this i m sending what are all the code line I had been written and the
error where i got
sc1 = new STATCONNECTORSRVLib.StatConnector();
sc1.Init("R");
and error at
SCN_E_INVALIDINTERPRETERVERSION -2147221487 0x80040011
can any one suggest how can i resolve it
thanks & regards;
kiran
[[alternative HTML version
2010 Feb 21
0
Time series cross-sectional regression analysis
Hi all,
Is there a package in R to perform time series cross-sectional regression analysis (like the TSCSREG procedure in SAS)? Thanks for the info.
Thanks and Regards,
Shubha Karanth | Amba Research
Ph +91 80 3980 8283 | Mob +91 94 4886 4510
Bangalore * Colombo * London * New York * San José * Singapore * www.ambaresearch.com
This e-mail may contain confidential and/or
2007 Sep 18
0
FW: ISIN numbers into Bloomberg tickers
Hi David,
I tried the following and get the below error messages....
con =
blpConnect(show.days="trading",na.action="previous.days",periodicity="da
ily")# connecting Bloomberg
> dat <- blpGetData(con,"US4009703799
Equity","PX_LAST",start=as.chron(as.Date("01/01/2005",
2008 May 14
2
dataframes to a list
Hi R,
I have the data frames, data1, data2....data50. Now I want to put all of
these in a single list. But,
>list(data1, data2,.........data50) is very big to write. How do I then
do it?
Thanks,
Shubha
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