mkogg.py: Fix 'self.get_mp4_metadata(self, source)'

[blog.git] / posts / calibcant.mdwn_itex

diff --git a/posts/calibcant.mdwn_itex b/posts/calibcant.mdwn_itex
index 05581d6b1261b7959421135d8f4c66ea2f16e7f4..b303b30793da3bf41a7472c4c360d27bb83f539a 100644 (file)
--- a/posts/calibcant.mdwn_itex
+++ b/posts/calibcant.mdwn_itex
@@ -42,7 +42,9 @@ The contact region of surface bumps can be fit with either linear or
 quadratic models.  Here is an example of a single surface bump fit
 with a quadratic model.  The green line is the initial guess (before
 fitting), the red line is the final model (after fitting), and the
-blue dots are measured data points.
+blue dots are measured data points.  The red dots in the bottom panel
+are the residual, which looks cubic because we've subtracted a
+quadratic model.
 
 [[!img bump.png alt="Surface bump for photodiode sensitivity"
   title="Surface bump for photodiode sensitivity" ]]
@@ -91,6 +93,16 @@ calibration data with different models if you decide to do so at a
 later date, or just look back and see exactly what calculations went
 into your spring constant calibration in the first place.
 
+I tried to build calibcant on top of a chain of packages to make
+swapping out the hardware interface easier, but [[Comedi]] is at the
+bottom of the current chain, so it may be hard to use this package if
+you're not running Linux.  If you're not running Linux, but are
+interested in getting calibcant working on your system anyway, send me
+an email!  I'd be happy to help generalize calibcant, but it's hard
+for me to imagine hardware control from Windows (do people run
+experiments from Macs?).  If you've figured that part out, I can
+probably graft calibcant onto your system.
+
 [pypi]: http://pypi.python.org/pypi/calibcant/
 [PDepgraph.py]:
   http://code.google.com/p/yjl/source/browse/Miscellaneous/PDepGraph.py