It worked! Thanks! Dave
On Jul 19, 2010, at 5:11 PM, Yoav Zibin wrote:
> Hi,
> You need to specify the rank/dimension of a_prefix_sum here :
>
> val a_prefix_sum = new Array[Int](a.region, (Point)=>0);
> ... a_prefix_sum([i-1]); ...
>
> So you need to write that:
> public static def computeSum(a:Array[Int]*(1)*)
>
>
>
> On Mon, Jul 19, 2010 at 5:03 PM, Dave Hudak <dhu...@osc.edu> wrote:
>
>> Hi All,
>>
>> I hope I am doing something easy to correct. I am trying to move some code
>> to compute the prefix sum of an integer array into its own method. I'm
>> using 2.0.4.
>>
>> I get the following error:
>>
>> dhu...@oscnet166 24%> x10c++ -x10rt mpi -o PrefixSum PrefixSum.x10
>> /Users/dhudak/osc/research/x10/tutorial/examples/PrefixSum.x10:34: Method
>> or static constructor not found for given matcher.
>> Matcher: a_prefix_sum(x10.lang.ValRail[x10.lang.Int
>> ]{self.length==1})
>> 1 error.
>>
>> ...which corresponds to the statement in the else clause of the computeSum
>> method
>>> a_prefix_sum(p) = a(p) + a_prefix_sum([i-1]);
>>
>> Below is the entire code for reference.
>>
>> Thanks,
>> Dave
>>
>> /*
>> * PrefixSum
>> * Sequential implementation
>> * Dave Hudak
>> * Ohio Supercomputer Center
>> */
>>
>> public class PrefixSum {
>> public static def str[T](a:Array[T]):String
>> {
>> var s : String = "";
>> //var is mutable
>> var first : Boolean = true;
>> //var declaration must include type
>> for (point in a) {
>> if (first) {
>> first = false;
>> }
>> else {
>> s += ", ";
>> }
>> s += a(point).toString();
>> //works because toString is global
>> }
>> return s;
>> }
>>
>> public static def computeSum(a:Array[Int]):Array[Int]{self.region ==
>> a.region}
>> {
>> val a_prefix_sum = new Array[Int](a.region, (Point)=>0);
>> for (p in a_prefix_sum) {
>> val (i) = p;
>> if (i == 1) {
>> a_prefix_sum(p) = a(p);
>> }
>> else {
>> a_prefix_sum(p) = a(p) + a_prefix_sum([i-1]);
>> }
>> }
>> return a_prefix_sum;
>> }
>>
>> public static def main(args: Rail[String]!): Void {
>> val ARRAY_SIZE = 10;
>> //values are like constants (immutable)
>> val r1 = [1..ARRAY_SIZE];
>> //define a range
>> val a1 = new Array[Int](r1, (Point)=>0);
>> //create an array of all zeroes
>> Console.OUT.println("a1(1) = " + a1([1]));
>> //index arrays using parens around points
>> for (p in a1) {
>> val (i) = p;
>> //fetch the subscript of the point
>> a1(p) = i;
>> //assign it to the array value
>> }
>> val a1_string = str(a1);
>> Console.OUT.println(a1_string);
>> val a1_prefix_sum = computeSum(a1);
>> val a1_prefix_sum_string = str(a1_prefix_sum);
>> Console.OUT.println(a1_prefix_sum_string);
>> }
>> }
>> ---
>> David E. Hudak, Ph.D. dhu...@osc.edu
>> Program Director, HPC Engineering
>> Ohio Supercomputer Center
>> http://www.osc.edu
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
>> This SF.net email is sponsored by Sprint
>> What will you do first with EVO, the first 4G phone?
>> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
>> _______________________________________________
>> X10-users mailing list
>> X10-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/x10-users
>>
> ------------------------------------------------------------------------------
> This SF.net email is sponsored by Sprint
> What will you do first with EVO, the first 4G phone?
> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
> _______________________________________________
> X10-users mailing list
> X10-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/x10-users
---
David E. Hudak, Ph.D. dhu...@osc.edu
Program Director, HPC Engineering
Ohio Supercomputer Center
http://www.osc.edu
------------------------------------------------------------------------------
This SF.net email is sponsored by Sprint
What will you do first with EVO, the first 4G phone?
Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
_______________________________________________
X10-users mailing list
X10-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/x10-users
