octave:2> A=toeplitz(sparse([1,1],[1,2],[-2,1],1,5)) A = Compressed Column Sparse (rows = 5, cols = 5, nnz = 13 [52%]) (1, 1) -> -2 (2, 1) -> 1 (1, 2) -> 1 (2, 2) -> -2 (3, 2) -> 1 (2, 3) -> 1 (3, 3) -> -2 (4, 3) -> 1 (3, 4) -> 1 (4, 4) -> -2 (5, 4) -> 1 (4, 5) -> 1 (5, 5) -> -2 octave:3> full(A) ans = -2 1 0 0 0 1 -2 1 0 0 0 1 -2 1 0 0 0 1 -2 1 0 0 0 1 -2 octave:4> B=toeplitz([0,-1,0,0,0],[0,1,0,0,0]) B = 0 1 0 0 0 -1 0 1 0 0 0 -1 0 1 0 0 0 -1 0 1 0 0 0 -1 0 octave:5> B=toeplitz(sparse(1,2,-1,1,5),sparse(1,2,1,1,5)) B = Compressed Column Sparse (rows = 5, cols = 5, nnz = 8 [32%]) (2, 1) -> -1 (1, 2) -> 1 (3, 2) -> -1 (2, 3) -> 1 (4, 3) -> -1 (3, 4) -> 1 (5, 4) -> -1 (4, 5) -> 1 octave:6> full(B) ans = 0 1 0 0 0 -1 0 1 0 0 0 -1 0 1 0 0 0 -1 0 1 0 0 0 -1 0 octave:7> catenaria octave:8> D1 D1 = Compressed Column Sparse (rows = 6, cols = 6, nnz = 10 [28%]) (2, 1) -> -1.2500 (1, 2) -> 1.2500 (3, 2) -> -1.2500 (2, 3) -> 1.2500 (4, 3) -> -1.2500 (3, 4) -> 1.2500 (5, 4) -> -1.2500 (4, 5) -> 1.2500 (6, 5) -> -1.2500 (5, 6) -> 1.2500 octave:9> D2 D2 = Compressed Column Sparse (rows = 6, cols = 6, nnz = 16 [44%]) (1, 1) -> -12.500 (2, 1) -> 6.2500 (1, 2) -> 6.2500 (2, 2) -> -12.500 (3, 2) -> 6.2500 (2, 3) -> 6.2500 (3, 3) -> -12.500 (4, 3) -> 6.2500 (3, 4) -> 6.2500 (4, 4) -> -12.500 (5, 4) -> 6.2500 (4, 5) -> 6.2500 (5, 5) -> -12.500 (6, 5) -> 6.2500 (5, 6) -> 6.2500 (6, 6) -> -12.500 octave:10> full(D1) ans = 0.00000 1.25000 0.00000 0.00000 0.00000 0.00000 -1.25000 0.00000 1.25000 0.00000 0.00000 0.00000 0.00000 -1.25000 0.00000 1.25000 0.00000 0.00000 0.00000 0.00000 -1.25000 0.00000 1.25000 0.00000 0.00000 0.00000 0.00000 -1.25000 0.00000 1.25000 0.00000 0.00000 0.00000 0.00000 -1.25000 0.00000 octave:11> full(D2) ans = -12.50000 6.25000 0.00000 0.00000 0.00000 0.00000 6.25000 -12.50000 6.25000 0.00000 0.00000 0.00000 0.00000 6.25000 -12.50000 6.25000 0.00000 0.00000 0.00000 0.00000 6.25000 -12.50000 6.25000 0.00000 0.00000 0.00000 0.00000 6.25000 -12.50000 6.25000 0.00000 0.00000 0.00000 0.00000 6.25000 -12.50000 octave:12> catenaria octave:13> catenatia error: 'catenatia' undefined near line 1 column 1 octave:13> catenaria ans = 0.036993 ans = 1.2153e-04 octave:14> catenaria ans = 0.042929 ans = 1.3613e-04 ans = 9.7231e-10 octave:15> catenaria ans = 0.042929 ans = 1.3613e-04 ans = 9.7231e-10 octave:16> catenaria octave:17> catenaria octave:18> diary off