[SciPy-user] Precision error on Mac OS X (PPC)
Iain Day
iain at day-online.org.uk.invalid
Tue Nov 14 13:18:55 EST 2006
Hi,
I apologise if this is the wrong list for this. I have been having some
precision issues with some code I've got. I've searched the list
archives and came across these tests. SciPy and numpy are installed from
Fink, and running on a 1.5GHz G4 with Mac os x 10.4.8.
>>> import numpy
>>> import scipy
>>> numpy.__version__
'1.0'
>>> scipy.__version__
'0.5.1'
>>> print numpy.finfo(numpy.float32).min
-3.40282346639e+38
>>> print numpy.finfo(numpy.float32).min,
numpy.finfo(numpy.float32).max, numpy.finfo(numpy.float32).eps
-3.40282346639e+38 3.40282346639e+38 1.19209289551e-07
>>> print numpy.finfo(numpy.float64).min,
numpy.finfo(numpy.float64).max, numpy.finfo(numpy.float64).eps
-1.79769313486e+308 1.79769313486e+308 2.22044604925e-16
>>> print numpy.finfo(numpy.float128).min,
numpy.finfo(numpy.float128).max, numpy.finfo(numpy.float128).eps
Warning: overflow encountered in add
Warning: invalid value encountered in subtract
Warning: invalid value encountered in subtract
Warning: overflow encountered in add
Warning: invalid value encountered in subtract
Warning: invalid value encountered in subtract
9223372034707292160.0 -9223372034707292160.0 1.38178697010200053818e-76
Any thoughts?
Iain
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