Arrays

Accessing elements of an XPE array

one dimentional

two dimentional

multi-dimentional

Determining the number of dimensions in an XPE array

Determining the number of elements in XPE array

one dimensional

uniform multi-dimensional

Performing operations on groups of elements of an XPE array

simple non-optimised access

optimised access

creating a new array

one dimentional

four dimentional

named one dimentional XPE array

 

accessing elements of an XPE array

• simple access to an element of a one dimentional XPE array called 'fred'

  	XPE::VARIABLE
  		element;
  
  	element = XPE::get_variable("fred").get_element(n1);
  

  the contents of the element can now be accessed in a manor similar to any other XPE variable

 
• simple access to an element of a two dimentional XPE array called 'fred'

  	XPE::VARIABLE
  		element;
  
  	element = XPE::get_variable("fred").get_element(n1, n2);
  

  the contents of the element can now be accessed in a manor similar to any other XPE variable

 
• simple access to an element of a multi-dimentional XPE array called 'fred'

  	XPE::VARIABLE
  		element;
  
  	int	dim_arr[3];
  
  	dim_arr[0] = n1;
  	dim_arr[1] = n2;
  	dim_arr[2] = n3;
  
  	element = XPE::get_variable("fred").get_array().get_element(3, dim_arr);
  

  the contents of the element can now be accessed in a manor similar to any other XPE variable

 

 

determining the number of elements in a one dimensional XPE array

	int	len;

	len = XPE::get_variable("fred").get_array().get_len();

 

determining the number of dimensions in an XPE array

	int	cnt;

	cnt = XPE::get_variable("fred").get_array().get_dim_cnt();

 

determining the number of elements in each dimension of a uniform multi-dimensional XPE array

	XPE::ARRAY
		array;

	int	cnt;

	int	size_of_dimension[100];


	array = XPE::get_variable("fred").get_array();

	cnt = array.get_dim_cnt();

	for (int j=0; j<cnt; j++)
	{
		size_of_dimension[j] = array.get_dim(j);
	}

 

Performing operations on groups of elements of an XPE array

• simple non-optimised access to an XPE array called 'fred'

  	XPE::VARIABLE
  		element;
  
  	int	len,
  		acc;
  
  
  	acc = 0;
  
  	len = XPE::get_variable("fred").get_array().get_len();
  
  	for (int j=0; j<len; j++)
  	{
  		element = XPE::get_variable("fred").get_element(j);
  
  		acc += element.get_int();
  	}
  


 
• optimised access to an XPE array called 'fred'

  	XPE::ARRAY
  		array;
  
  	XPE::VARIABLE
  		element;
  
  	int	len,
  		acc;
  
  
  	acc = 0;
  
  	array = XPE::get_variable("fred").get_array();
  
  	len = array.get_len();
  
  	for (int j=0; j<len; j++)
  	{
  		element = array.get_element(j);
  
  		acc += element.get_int();
  	}
  

 

creating a new array

• a one dimentional XPE array

  	XPE::ARRAY
  		array;
  
  	int	dim_arr[1];
  
  	dim_arr[0] = n1;
  
  	array = XPE::ARRAY(1, dim_arr);
  


 
• a four dimentional XPE array

  	XPE::ARRAY
  		array;
  
  	int	dim_arr[4];
  
  	dim_arr[0] = n1;
  	dim_arr[1] = n2;
  	dim_arr[2] = n3;
  	dim_arr[3] = n4;
  
  	array = XPE::ARRAY(4, dim_arr);
  


 
• a one dimentional XPE array called 'fred'

  	int	dim_arr[1];
  
  	dim_arr[0] = n1;
  
  	XPE::get_variable("fred") = XPE::ARRAY(1, dim_arr);