| rational(rational) | R Documentation |
rational(x, ...)
x |
Numeric array to be approximated. |
... |
Optional additional parameters to be passed to rat(x, ...) |
Numeric array of the same shape as x of rational
approximations.
If x contains the results of a calculation for which the
correct answers rational with ``small'' denominators, this may remove
roundoff error.
Similar to round(..), except that full accuracy is maintained
for many exactly rational quantities.
fractions and the primitive function rat.
# solve() accuracy check using a small Hilbert Matrix
x <- matrix(0,5,5); x <- 1/(row(x) + col(x) - 1); rat(x)
x1 <- solve(solve(x))
#compare:
x-x1
#with:
x-rational(x1)