Fixed a plot error.
make filename extension lowercase. fixes a compile error.
minor typesetting fixes
add illustration of ellipse fitting.

TODO: This lab needs solutions.
workaround for displaying a single russian character.
Added rank approximation figures
Add figure to Laplace problem.

Added more explanation to some problems.
Reworded a problem
Added a note to profiling problem.
changed figures for matplotlib lab

added figures.py
Merge branch 'fixes' of https://github.com/jhendr/numerical_computing into fixes
Added images and fixed lots of minor spelling erros
Merge pull request #224 from AZaitzeff/more

Added images and fixed lots of minor spelling erros
Merge pull request #219 from ayr0/exposition

Expositions to labs.
Small fixes to labs.
Added missing images.
More changes in the Cython lab.
Updated plots, added files to ignore to .gitignore, and some minor changes
in the Cython lab.
Merge pull request #225 from jhendr/fixes

Missing Images and Small Fixes
fix compile errors
Merge pull request #226 from ayr0/fixes2

fix compile errors