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empirical_inv() out of memory
From: |
Glenn Golden |
Subject: |
empirical_inv() out of memory |
Date: |
Fri, 23 Jan 2004 14:10:30 -0700 |
Running 2.1.50:
Is the following a reasonable out-of-memory situation?
1> f = 1 - 10 .** [-1:-1/3:-6];
2> g = abs(rand(4e6,1)) .** 2;
3> empirical_inv (f, g)
error: memory exhausted -- trying to return to prompt
Admittedly the dataset is large and the length of f (16) multiplies
the memory requirement by at least that factor, but OTOH, I have 256MB
and 512MB swap space, nothing else was running, and Octave was invoked
from a fresh start with nothing else in the workspace.
Certainly it can be worked around easily by calling empirical_inv()
with the individual elements of f. Nevertheless, it doesn't seem like
an entirely unreasonable sized problem to expect a distribution function
to handle.
Possibly related (or not) is the following comment in discrete_inv.m
(which is called by empirical_inv.m):
if (any (k = find ((x > 0) & (x < 1))))
n = length (k);
## --FIXME--
## This does not work!
inv(k) = v(sum ((ones (m, 1) * x(k)) > (s * ones (1, n))) + 1);
endif
(This is same version (1.5) of discrete_inv.m as the top delta in the
CVS tree.)
Glenn Golden
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- empirical_inv() out of memory,
Glenn Golden <=