[R] Return dynamic array from C to R
Hi Everyone,
I am new to R and I am trying to return array(dynamic) from C to R. But
when I print array(vector) in R it gives NA as output. When I print array
in C it gives correct o/p but some how it is not returned to R.
*Code in C:*
void test(double *vec,double *size){
vec = (double *)calloc(2 , sizeof(double));
*(vec+0) = 1;
*(vec+1) = 2;
*size = 2;
}
*Code in R:*
test-.C(test,vec=as.double(),size=as.integer())
print(test$vec[1:test$size])
Is there any other way to implement above thing?
Any help would be appreciated
Thanks
[[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.
[R] Plot OctTree
Hi Everyone, I have csv file which is in following format xmin,xmax,ymin,ymax,zmin,zmax I want to plot 3d graph with all the all octants being displayed as well. Any idea? I have used scatterplot3d package but it does not seem to have anything by which i can draw octants inside cube as well. Thanks [[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.
[R] Pass Vector from R to C
Hi , I have a function which passes a vector from R to C. However the size of the vector is decided inside the c program. But as I have to pass the size while calling the function from R lot of my space is getting wasted. Is there any other alternative? I call c function as : hi-.C(main,v1=as.double(vector(double,1000)),v2=as.double(vector(double,1000)),v3=as.double(vector(double,1000)),v4=as.double(vector(double,1000)),points.csv,as.integer(15000),quad.csv) Here if only 250 space are filled then in remaining 750 space 0.0 is returned and I don't want that moreover I want that the resultant vector should be returned back to R. Thanks [[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.
[R] Pointers in R
Hello Everyone, I am new to R and would like to create a quad tree in R. However the problem is that I don't think R has pointers. Is there any way to create a tree in R? Thanks [[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] Pass String from R to C
I tried using char ** but it is printing some random string.
On Sat, Apr 23, 2011 at 6:08 PM, Duncan Murdoch murdoch.dun...@gmail.comwrote:
On 11-04-23 7:04 PM, Jaimin Dave wrote:
Hi,
I am using a function which accepts the string from R and prints it.
But when I am calling .C(main,hello);
it is printing any random thing.
My C function is
void main(char *str)
See Writing R Extensions. The declaration should be char **str.
Duncan Murdoch
{
Rprintf(%s,str);
}
Can you help how to achieve this using .C interface?
Thanks
Jaimin
[[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.
[R] Pass String from R to C
Hi,
I am using a function which accepts the string from R and prints it.
But when I am calling .C(main,hello);
it is printing any random thing.
My C function is
void main(char *str)
{
Rprintf(%s,str);
}
Can you help how to achieve this using .C interface?
Thanks
Jaimin
[[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] Grid on Map
Hi,
I tried it using abline but it is not showing any o/p(i.e no grids are
formed on map). I did following :
map('state','new york',proj='azequalarea',orient=c(42.5,-74.56,0))
abline(h=seq(41, 44, length=3))
abline(v=seq(-79, -76, length=3))
I also tried using map.grid() but in some cases it is dividing into exact 4
quadrants.
On Wed, Apr 6, 2011 at 2:49 PM, MacQueen, Don macque...@llnl.gov wrote:
Possibly something similar to
abline(v=seq(long.min, long.max, length=3)
abline(h=seq(lat.min, lat.max, length=3)
?
The above will add vertical and horizontal lines to an existing plot, and
assumes that the plot is in long/lat coordinates. Of course, this ignores
the fact that long/lat is not a cartesian coordinate system.
(can't provide more detail without more information)
-Don
--
Don MacQueen
Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062
-Original Message-
From: Jaimin Dave davejaim...@gmail.com
Date: Mon, 4 Apr 2011 18:39:45 -0700
To: r-help@r-project.org r-help@r-project.org
Subject: [R] Grid on Map
I am new to R.I want to draw grid from a csv file which contains latitude
minimum ,latitude maximum ,longitude minimum ,longitude maximum.The grid
should be divided into exactly 4 quadrants. The map is of NY state of
USA. I
want to know how can I do it.
Help would be appreciated.
Thanks
Jaimin
[[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.
[[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.
[R] Grid on Map
I am new to R.I want to draw grid from a csv file which contains latitude minimum ,latitude maximum ,longitude minimum ,longitude maximum.The grid should be divided into exactly 4 quadrants. The map is of NY state of USA. I want to know how can I do it. Help would be appreciated. Thanks Jaimin [[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.
[R] Points on Map
Hi, I am new to R and I want to plot points on the Map of New York . I also want to divide map of New York into small grids(not fixed) .I want that these point should be plotted from a file.How can I do it?Any help would be greatly appreciated. Thanks Jaimin [[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.
[R] Using C code in R
Hi,
I am new to R and I want to know how to use C code which contains two
functions one called inside another.I know that how to use C code in R if it
has only one function but dont know how to do it in above case. I want to
use the same in R .My C code is as follows.
//#include R.h
void sayHello();
void g();
void sayhello() {
Rprintf(Hello world %d\n,global);
}
void g()
{
int a=9;
int b=1;
Rprintf(Hello world\n %d,(a+b));
sayHello();
}
Help would be greatly appreciated
Thanks
[[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.
[R] QuadTree
Could any one tell me how to implement QuadTree in R? Or are there any packages avaialble to implement it in R. [[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.
