speech signal process tools

				double dmtrace(M1,M2,n)/* returns trace of M1*M2, M1 and M2 matrices  */				register double *M1,*M2;				register int n;				{					register int i;					register double trace;					double dot();									trace=0;					for(i=0;i						trace+=dot(M1,1,M2,n,n);					return(trace);				}