z_piezo_calib output confirmed with

$ cd /home/wking/research/drexel/gyang/data/z_piezo_calib
$ ipython --pylab
In [1]: import z_piezo_calib
In [2]: z_piezo_calib.analyze_calibration_data_from_tweaks(bump_tweaks="20081215_tweak.bump", vib_tweaks="20081215_tweak.vib", T_tweaks="20081215_tweak.temp", plotVerbose=False)
a**2    : 0.000190122 +/- 1.86869e-06 (0.00982893)
T       : 295.15 +/- 5.68434e-14 (1.92592e-16)
1/Vp**2 : 61416.8 +/- 17792.9 (0.289708)
Out[2]: 
(0.0475823000538,
 0.0137928827301,
 0.00982893194938,
 1.92591627514e-16,
 0.289707547407)

In [3]: z_piezo_calib.analyze_calibration_data_from_tweaks(bump_tweaks="20081215_tweak_second.bump", vib_tweaks="20081215_tweak_second.vib", T_tweaks="20081215_tweak_second.temp", plotVerbose=False)
a**2    : 0.000217743 +/- 1.08297e-06 (0.00497362)
T       : 295.15 +/- 5.68434e-14 (1.92592e-16)
1/Vp**2 : 38507.9 +/- 13142.7 (0.341299)
Out[3]: 
(0.034168120631,
 0.0116627940459,
 0.00497362408195,
 1.92591627514e-16,
 0.341299306648)

However, plotVerbose is broken (missing figure definition), so I'm
gonna go fix that now.