Template Function thrust::generate_n(OutputIterator, Size, Generator)¶

Function Documentation¶

template<typename OutputIterator, typename Size, typename Generator> OutputIterator thrust::generate_n(OutputIterator first, Size n, Generator gen)

generate_n assigns the result of invoking gen, a function object that takes no arguments, to each element in the range [first,first + n). The return value is first + n.

The following code snippet demonstrates how to fill a

host_vector with random numbers, using the standard C library function rand.

Parameters

first: The first element in the range of interest.
n: The size of the range of interest.
gen: A function argument, taking no parameters, used to generate values to assign to elements in the range [first,first + n).

Template Parameters

OutputIterator: is a model of Output Iterator.
Size: is an integral type (either signed or unsigned).
Generator: is a model of Generator, and Generator's result_type is convertible to a type in OutputIterator's set of value_types.

#include <thrust/generate.h>
#include <thrust/host_vector.h>
#include <stdlib.h>
...
thrust::host_vector<int> v(10);
srand(13);
thrust::generate_n(v.begin(), 10, rand);

// the elements of v are now pseudo-random numbers

See: generate
See: http://www.sgi.com/tech/stl/generate.html