p37 nan explained.ox

时间序列分析中著名的OxMetrics软件包

#include <oxstd.h> 
#include <oxfloat.h>

main()              
{
	decl x=range(0,10)';		  //range is useful to create a VECTOR
	println("x initial ",x);
	decl r=<3,7>;
	x[r]=M_NAN;
	println("x filled",x,"deleter(x)",deleter(x),
	        "isdotnan(x)",isdotnan(x));
}