rat
rat — Floating point rational approximation
Calling sequence
[N,D]=rat(x [,tol])
y=rat(x [,tol])
Parameters
| x | : real vector or matrix |
| n | : integer vector or matrix |
| d | : integer vector or matrix |
| y | : real vector or matrix |
Description
[N,D] = rat(x,tol) returns two integer
matrices so that N./D is close tox in the sense that
abs(N./D - X) <= tol*abs(x). The rational approximations are
generated by truncating continued fraction expansions.
tol = 1.e-6*norm(X,1) is the default.
y = rat(x,tol) return the quotient N./D
Examples
[n,d]=rat(%pi)
[n,d]=rat(%pi,1.d-12)
n/d-%pi
See also
int, round
