diff options
| author | Shashank | 2017-05-29 12:40:26 +0530 |
|---|---|---|
| committer | Shashank | 2017-05-29 12:40:26 +0530 |
| commit | 0345245e860375a32c9a437c4a9d9cae807134e9 (patch) | |
| tree | ad51ecbfa7bcd3cc5f09834f1bb8c08feaa526a4 /modules/polynomials/macros/lcmdiag.sci | |
| download | scilab_for_xcos_on_cloud-0345245e860375a32c9a437c4a9d9cae807134e9.tar.gz scilab_for_xcos_on_cloud-0345245e860375a32c9a437c4a9d9cae807134e9.tar.bz2 scilab_for_xcos_on_cloud-0345245e860375a32c9a437c4a9d9cae807134e9.zip | |
CMSCOPE changed
Diffstat (limited to 'modules/polynomials/macros/lcmdiag.sci')
| -rwxr-xr-x | modules/polynomials/macros/lcmdiag.sci | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/modules/polynomials/macros/lcmdiag.sci b/modules/polynomials/macros/lcmdiag.sci new file mode 100755 index 000000000..28d82ed5a --- /dev/null +++ b/modules/polynomials/macros/lcmdiag.sci @@ -0,0 +1,49 @@ +// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab +// Copyright (C) ????-2008 - INRIA +// +// This file must be used under the terms of the CeCILL. +// This source file is licensed as described in the file COPYING, which +// you should have received as part of this distribution. The terms +// are also available at +// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt + + +function [N,D]=lcmdiag(H,flag) + //returns N and diagonal D + //such that: + // flag='row' => H=D^(-1)*N and D(k,k)=lcm of kth row of H('den') + // flag='col' => H=N*D^(-1) and D(k,k)=lcm of kth col of H('den') + // default flag = 'col' + + if (type(H)<>2 & type(H)<>16) then + error(msprintf(_("%s: Wrong type for argument #%d: Real Matrix of Polynomials expected.\n"), "lcmdiag", 1)); + end + + Num = H("num"); + Den = H("den"); + [m, n] = size(H); + D = []; N = []; + [lhs, rhs] = argn(0); + if rhs==1 then + flag = "col"; + elseif type(flag)<>10 then + error(msprintf(_("%s: Wrong type for argument #%d: String expected.\n"), "lcmdiag", 2)); + end + select flag + case "row" + for k = 1:m + [pgcd, fact] = lcm(Den(k, :)); //H(k,:)=(Num(k,:).*fact)/pgcd + D = diag([diag(D); pgcd]); + N = [N; Num(k, :).*fact]; + end + case "col" + for k = 1:n + [pgcd, fact] = lcm(Den(:, k)); + D = diag([diag(D); pgcd]); + N = [N, Num(:, k).*fact]; + end + else + error(msprintf(_("%s: Wrong value for argument #%d: %s or %s expected.\n"), "lcmdiag", 2, "row", "col")); + end + +endfunction |