[SciPy-user] Precision error on Mac OS X (PPC)

Iain Day iain at day-online.org.uk.invalid
Tue Nov 14 12:18:55 CST 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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