Mercurial > matrix-functions
view toolbox/chop.m @ 0:8f23314345f4 draft
Create local repository for matrix toolboxes. Step #0 done.
author | Antonio Pino Robles <data.script93@gmail.com> |
---|---|
date | Wed, 06 May 2015 14:56:53 +0200 |
parents | |
children |
line wrap: on
line source
function c = chop(x, t) %CHOP Round matrix elements. % CHOP(X, t) is the matrix obtained by rounding the elements of X % to t significant binary places. % Default is t = 24, corresponding to IEEE single precision. if nargin < 2, t = 24; end [m, n] = size(x); % Use the representation: % x(i,j) = 2^e(i,j) * .d(1)d(2)...d(s) * sign(x(i,j)) % On the next line `+(x==0)' avoids passing a zero argument to LOG, which % would cause a warning message to be generated. y = abs(x) + (x==0); e = floor(log2(y) + 1); c = pow2(round( pow2(x, t-e) ), e-t);