'measurement frame' field must be a double matrix, fixes #76

[ihnorton]

No description provided.

[ihnorton]

@tashrifbillah

[addisonElliott]

PR looks good to me, just need to resolve the tests.

[tashrifbillah]

numpy.set_printoptions() clearly has floatmode argument.
https://docs.scipy.org/doc/numpy-1.14.0/reference/generated/numpy.set_printoptions.html

The only other reason I can think of is the numpy in travis-ci is outdated.

[codecov-io]

Codecov Report

Merging #77 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #77   +/-   ##
=======================================
  Coverage   88.12%   88.12%           
=======================================
  Files           6        6           
  Lines         362      362           
  Branches      117      117           
=======================================
  Hits          319      319           
  Misses         21       21           
  Partials       22       22

Impacted Files	Coverage Δ
nrrd/reader.py	83.73% <100%> (ø)	⬆️

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[ihnorton]

Updated to fix (realized set_printoptions wasn't doing anything anyway, because any assertion failures go through whatever nose uses to print).

[tashrifbillah]

@ihnorton , when printing the bvecs, should I use:
np.set_printoptions(suppress= True, floatmode= 'maxprec')
or just set precision= 17 ?