FR2NT Calculates the counting distribution given the frequency matrix. CALL: NT = fr2nt(fr); where NT = a square counting distribution matrix for a cycle count, fr = a square frequency matrix for a cycle count.

- triu

Extract upper triangular part. |

- fr2comb

Combination matrix for placing out cycles given the frequency matrix |

01 function NT = fr2nt(f) 02 %FR2NT Calculates the counting distribution given the frequency matrix. 03 % 04 % CALL: NT = fr2nt(fr); 05 % 06 % where 07 % 08 % NT = a square counting distribution matrix for a cycle count, 09 % fr = a square frequency matrix for a cycle count. 10 11 % Copyright 1993, Mats Frendahl, Dept. of Math. Stat., University of Lund. 12 13 [n m]=size(f); 14 if (n==m) & (n>2) 15 m1=cumsum(cumsum(f')'-f); 16 m2=zeros(n,n); 17 m2(2:n-1,2:n-1)=m1(1:n-2,2:n-1); 18 NT=fliplr(triu(fliplr(m2),0)); 19 else 20 disp([' The matrix is not square or dimension < 3.']) 21 disp([' Program will terminate.']) 22 end 23

Mathematical Statistics

Centre for Mathematical Sciences

Lund University with Lund Institute of Technology

Comments or corrections to the WAFO group

Generated on Thu 06-Oct-2005 02:21:16 for