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Two very obvious spline bugs fixed.

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This commit is contained in:
Steven Robertson 2011-10-28 21:34:42 -04:00
parent 28e73d08ee
commit bfff915b7e
1 changed files with 21 additions and 3 deletions
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24
cuburn/genome.py
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@ -31,8 +31,8 @@ class SplEval(object):
self.knots.T.flat[:] = knots
def find_knots(self, itime):
idx = np.searchsorted(self.knots[0][1:-1], itime)
idx = min(idx, len(self.knots[0]) - 4)
idx = np.searchsorted(self.knots[0], itime) - 2
idx = max(0, min(idx, len(self.knots[0]) - 4))
times = self.knots[0][idx:idx+4]
vals = self.knots[1][idx:idx+4]
@ -51,15 +51,33 @@ class SplEval(object):
mat = self._mat
if deriv:
mat *= self._deriv ** (deriv+1)
mat = mat * self._deriv ** (deriv)
val = [m1, vals[1], m2, vals[2]] * mat * np.array([[t**3, t**2, t, 1]]).T
return val[0,0]
def _plt(self, name='SplEval'):
import matplotlib.pyplot as plt
x = np.linspace(-0.05, 1.05, 500)
r = x[1] - x[0]
derivs = [(self(i+2*r)-self(i-2*r))/(4*r) for i in x]
plt.figure(1)
plt.title(name)
plt.plot(x,map(self,x),x,[self(i,1) for i in x],'--',x,derivs,'r.')
plt.show()
def __str__(self):
return '[%g:%g]' % (self(0), self(1))
def __repr__(self):
return '<interp [%g:%g]>' % (self(0), self(1))
@property
def knotlist(self):
if np.std(self.knots[1]) < 1e-6:
return self.knots[1][0]
return list(self.knots.T.flat)
@classmethod
def wrap(cls, obj):
"""