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fixes for 'lat=0' and 0 time series issues #62

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fixes for 'lat=0' and 0 time series issues #62

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d5548e4
fix issue with lat=0
Jun 21, 2018
f00d018
catches error in the computation of confidence intervals for null tim…
Jun 21, 2018
fcabbff
minor updates to proposed fixes
Jun 21, 2018
530edcf
more compact division
Jun 21, 2018
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5 changes: 4 additions & 1 deletion utide/confidence.py
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Expand Up @@ -252,7 +252,10 @@ def _confidence(coef, cnstit, opt, t, e, tin, elor, xraw, xmod, W, m, B,
varcov_mCw[c, :2, :2] = Duu

if not opt.white:
Duu = Puu[c] * Duu / np.trace(Duu)
Duu = Puu[c] * Duu
trace = np.trace(Duu)
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This is not the same as the original even in the normal case. The order of the two lines above would need to be swapped.

if trace != 0.:
Duu /= trace
varcov_mCc[c, :2, :2] = Duu

if not opt.twodim:
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4 changes: 3 additions & 1 deletion utide/harmonics.py
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Expand Up @@ -122,7 +122,9 @@ def FUV(t, tref, lind, lat, ngflgs):

astro, ader = ut_astron(tt)

if abs(lat) < 5:
if lat == 0:
lat = 5
elif abs(lat) < 5:
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LGTM

lat = np.sign(lat) * 5

slat = np.sin(np.deg2rad(lat))
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