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Diffstat (limited to 'doc/source/user/misc.rst')
| -rw-r--r-- | doc/source/user/misc.rst | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/doc/source/user/misc.rst b/doc/source/user/misc.rst index 316473151..8d5ca86f1 100644 --- a/doc/source/user/misc.rst +++ b/doc/source/user/misc.rst @@ -19,10 +19,10 @@ Note: cannot use equality to test NaNs. E.g.: :: False >>> myarr[myarr == np.nan] = 0. # doesn't work >>> myarr - array([ 1., 0., NaN, 3.]) + array([ 1., 0., nan, 3.]) >>> myarr[np.isnan(myarr)] = 0. # use this instead find >>> myarr - array([ 1., 0., 0., 3.]) + array([1., 0., 0., 3.]) Other related special value functions: :: @@ -79,20 +79,24 @@ Examples >>> oldsettings = np.seterr(all='warn') >>> np.zeros(5,dtype=np.float32)/0. - invalid value encountered in divide + Traceback (most recent call last): + ... + RuntimeWarning: invalid value encountered in true_divide >>> j = np.seterr(under='ignore') >>> np.array([1.e-100])**10 + array([0.]) >>> j = np.seterr(invalid='raise') >>> np.sqrt(np.array([-1.])) + Traceback (most recent call last): + ... FloatingPointError: invalid value encountered in sqrt >>> def errorhandler(errstr, errflag): ... print("saw stupid error!") >>> np.seterrcall(errorhandler) - <function err_handler at 0x...> >>> j = np.seterr(all='call') >>> np.zeros(5, dtype=np.int32)/0 - FloatingPointError: invalid value encountered in divide saw stupid error! + array([nan, nan, nan, nan, nan]) >>> j = np.seterr(**oldsettings) # restore previous ... # error-handling settings |