Hi Peter, >> Atop h5diff 1.8.5-patch1 I've noticed that comparing NaN against NaN >> passes when using --use-system-epsilon. It fail when using >> --delta=something.
> It may be the case that your system epsilon is different from DBL_EPSILON.... > > -d D, --delta=D > Print difference if (|a-b| > D). D must be a positive number. > Can not use with '-p' or '--use-system-epsilon'. > ... > --use-system-epsilon > Print difference if (|a-b| > EPSILON), EPSILON is system defined > value. My question wasn't about the magnitude of EPSILON used. Changing the magnitude of the EPSILON used in the comparison (|a-b| > EPSILON) cannot explain the differences in NaN handling I described above. Something else must be different between --use-system-epsilon and --delta=something (for appropriately chosen "something"). Maybe --nan is implied? Maybe the comparison is "inverted" for --use-system-epsilon so that a NaN causes the check to succeed while the "regular" check for --delta=something fails for a NaN value? Thanks for the response, Rhys _______________________________________________ Hdf-forum is for HDF software users discussion. Hdf-forum@hdfgroup.org http://mail.hdfgroup.org/mailman/listinfo/hdf-forum_hdfgroup.org
