find_root attribute error in Ubuntu 14.04

[NahsiN]

Hello, I just downloaded the binary of Sage 6.2 for Ubuntu 14.04 64-bit. While going through the tutorial, find_root does not work.

sage: phi = var('phi')

sage: find_root(cos(phi)==sin(phi),0,pi/2)

---------------------------------------------------------------------------

AttributeError                            Traceback (most recent call last)

<ipython-input-7-a4d72c0e34b9> in <module>()

----> 1 find_root(cos(phi)==sin(phi),Integer(0),pi/Integer(2))

/opt/sage-6.2-x86_64-Linux/local/lib/python2.7/site-packages/sage/numerical/optimize.py in find_root(f, a, b, xtol, rtol, maxiter, full_output)

    110         a = s

    111 

--> 112     import scipy.optimize

    113     return scipy.optimize.brentq(f, a, b,

    114                                  full_output=full_output, xtol=xtol, rtol=rtol, maxiter=maxiter)

/opt/sage-6.2-x86_64-Linux/local/lib/python2.7/site-packages/scipy/__init__.py in <module>()

     68 __all__ = ['test']

     69 

---> 70 from numpy import show_config as show_numpy_config

     71 if show_numpy_config is None:

     72     raise ImportError("Cannot import scipy when running from numpy source directory.")

/opt/sage-6.2-x86_64-Linux/local/lib/python2.7/site-packages/numpy/__init__.py in <module>()

    135         return loader(*packages, **options)

    136 

--> 137     import add_newdocs

    138     __all__ = ['add_newdocs']

    139 

/opt/sage-6.2-x86_64-Linux/local/lib/python2.7/site-packages/numpy/add_newdocs.py in <module>()

      7 #       core/fromnumeric.py, core/defmatrix.py up-to-date.

      8 

----> 9 from numpy.lib import add_newdoc

     10 

     11 ###############################################################################

/opt/sage-6.2-x86_64-Linux/local/lib/python2.7/site-packages/numpy/lib/__init__.py in <module>()

     11 

     12 import scimath as emath

---> 13 from polynomial import *

     14 #import convertcode

     15 from utils import *

/opt/sage-6.2-x86_64-Linux/local/lib/python2.7/site-packages/numpy/lib/polynomial.py in <module>()

      9 import re

     10 import warnings

---> 11 import numpy.core.numeric as NX

     12 

     13 from numpy.core import isscalar, abs, finfo, atleast_1d, hstack, dot

AttributeError: 'module' object has no attribute 'core'

sage: version()

'Sage Version 6.2, Release Date: 2014-05-06'

Any ideas of what could be causing this error?

[Jan Groenewald]

Hi

I cannot reproduce this:
sage: import numpy.core.numeric as NX

sage: phi = var('phi')
sage: find_root(cos(phi)==sin(phi),0,pi/2)

0.7853981633974484
sage:

Maybe something is wrong with your installation?

Regards,
Jan

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[NahsiN]

Hi, I have solved this myself. Turns out libgfortran3 library wasn't installed so I just did

sudo apt-get install libgfortran3

Thanks for the help,

Nishan