Mercurial > matrix-functions
view matrixcomp/vand.m @ 7:e0817ccb2834 draft
Add square root matrix function file, rename atom at funm_files, modify old toolbox to run it inside GNU Octave.
added funm_files/fun_atom.m
added sqrtm2.m
added toolbox/gecp.m
toolbox/see.m: comment wrong call to subplot
toolbox/tmtdemo.m: add a cast to double, as eig does not admit bool matrix input
removed funm_files/funm_atom.m
author | Antonio Pino Robles <data.script93@gmail.com> |
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date | Tue, 26 May 2015 18:14:54 +0200 |
parents | 8f23314345f4 |
children |
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function V = vand(m, p) %VAND Vandermonde matrix. % V = VAND(P), where P is a vector, produces the (primal) % Vandermonde matrix based on the points P, i.e. V(i,j) = P(j)^(i-1). % VAND(M,P) is a rectangular version of VAND(P) with M rows. % Special case: If P is a scalar then P equally spaced points on [0,1] % are used. % Reference: % N. J. Higham, Accuracy and Stability of Numerical Algorithms, % Second edition, Society for Industrial and Applied Mathematics, % Philadelphia, PA, 2002; chap. 22. if nargin == 1, p = m; end n = length(p); % Handle scalar p. if n == 1 n = p; p = linspace(0,1,n); end if nargin == 1, m = n; end p = p(:).'; % Ensure p is a row vector. V = ones(m,n); for i=2:m V(i,:) = p.*V(i-1,:); end