def angleFromSineAndCosine(sine, cosine):
sine = min(1., max(-1., sine))
angle = Numeric.arcsin(abs(sine))
if sine*cosine < 0.:
angle = -angle
if cosine < 0.:
angle = Numeric.pi + angle
if angle < 0.:
angle = 2.*Numeric.pi + angle
return angle
def testTrig (self):
"Test sin, cos, tan, and their inverses"
assert_eq(Numeric.arccos(-1.0), Numeric.pi)
assert_eq(Numeric.sin(self.a), map(math.sin, self.a))
assert_eq(Numeric.cos(self.a), map(math.cos, self.a))
assert_eq(Numeric.tan(self.a), map(math.tan, self.a))
assert_eq(Numeric.arccos(self.a), map(math.acos, self.a))
assert_eq(Numeric.arcsin(self.a), map(math.asin, self.a))
assert_eq(Numeric.arctan(self.a), map(math.atan, self.a))
assert Numeric.sin(self.m).shape == self.m.shape
assert Numeric.cos(self.m).shape == self.m.shape
assert Numeric.tan(self.m).shape == self.m.shape
assert Numeric.arcsin(self.m).shape == self.m.shape
assert Numeric.arccos(self.m).shape == self.m.shape
assert Numeric.arctan(self.m).shape == self.m.shape
assert_eq(Numeric.sin(self.m).flat, map(math.sin, self.m.flat))
assert_eq(Numeric.cos(self.m).flat, map(math.cos, self.m.flat))
assert_eq(Numeric.tan(self.m).flat, map(math.tan, self.m.flat))
assert_eq(Numeric.arcsin(self.m).flat, map(math.asin, self.m.flat))
assert_eq(Numeric.arccos(self.m).flat, map(math.acos, self.m.flat))
assert_eq(Numeric.arctan(self.m).flat, map(math.atan, self.m.flat))
def arcsin(self): v = Numeric.arcsin(self.value) d = 1./Numeric.sqrt(1.-pow(self.value,2)) return DerivVar(v, map(lambda x,f=d: f*x, self.deriv))
def test1(*s):
"Test of basic array creation and arithmetic."
x=Numeric.array([1.,1.,1.,-2., pi/2.0, 4., 5., -10., 10., 1., 2., 3.])
y=Numeric.array([5.,0.,3., 2., -1., -4., 0., -10., 10., 1., 0., 3.])
a10 = 10.
m1 = [1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0]
m2 = [0, 0, 1, 0, 0, 1, 1, 0, 0, 0 ,0, 1]
xm = array(x, mask=m1)
ym = array(y, mask=m2)
z = Numeric.array([-.5, 0., .5, .8])
zm = array(z, mask=[0,1,0,0])
xf = Numeric.where(m1, 1.e+20, x)
xm.set_fill_value(1.e+20)
for item in [x, y, xm, ym, xf]:
item.shape = s
assert isMaskedArray(x) == 0
assert isMaskedArray(xm) == 1
assert shape(xm) == s
assert xm.shape == s
assert size(xm) == reduce(lambda x,y:x*y, s)
assert xm.size() == size(xm)
assert size(xm,0) == s[0]
assert xm.size(0) == size(xm,0)
assert count(xm) == len(m1) - reduce(lambda x,y:x+y, m1)
if rank(xm) > 1:
assert count(xm,0) == size(xm,0) - reduce(lambda x,y:x+y, xm.mask()[0])
alltest(xm, xf)
alltest(filled(xm, 1.e20), xf)
alltest(x, xm)
alltest(-x, -xm)
alltest(x + y, xm + ym)
alltest(x - y, xm - ym)
alltest(x * y, xm * ym)
alltest(x / y, xm / ym)
alltest(a10 + y, a10 + ym)
alltest(a10 - y, a10 - ym)
alltest(a10 * y, a10 * ym)
alltest(a10 / y, a10 / ym)
alltest(x + a10, xm + a10)
alltest(x - a10, xm - a10)
alltest(x * a10, xm * a10)
alltest(x / a10, xm / a10)
a2d = array([[1,2],[0,4]], Float)
a2dm = masked_array(a2d, [[0,0],[1,0]])
alltest (a2d * a2d, a2d * a2dm)
alltest (a2d + a2d, a2d + a2dm)
alltest (a2d - a2d, a2d - a2dm)
alltest(x**2, xm**2)
alltest(abs(x)**2.5, abs(xm) **2.5)
alltest(x**y, xm**ym)
alltest(Numeric.add(x,y), add(xm, ym))
alltest(Numeric.subtract(x,y), subtract(xm, ym))
alltest(Numeric.multiply(x,y), multiply(xm, ym))
alltest(Numeric.divide(x,y), divide(xm, ym))
alltest(Numeric.cos(x), cos(xm))
alltest(Numeric.cosh(x), cosh(xm))
alltest(Numeric.sin(x), sin(xm))
alltest(Numeric.sinh(x), sinh(xm))
alltest(Numeric.tan(x), tan(xm))
alltest(Numeric.tanh(x), tanh(xm))
alltest(Numeric.sqrt(abs(x)), sqrt(xm))
alltest(Numeric.log(abs(x)), log(xm))
alltest(Numeric.log10(abs(x)), log10(xm))
alltest(Numeric.exp(x), exp(xm))
alltest(Numeric.arcsin(z), arcsin(zm))
alltest(Numeric.arccos(z), arccos(zm))
alltest(Numeric.arctan(z), arctan(zm))
alltest(Numeric.arctan2(x, y), arctan2(xm, ym))
alltest(Numeric.absolute(x), absolute(xm))
alltest(Numeric.equal(x,y), equal(xm, ym))
alltest(Numeric.not_equal(x,y), not_equal(xm, ym))
alltest(Numeric.less(x,y), less(xm, ym))
alltest(Numeric.greater(x,y), greater(xm, ym))
alltest(Numeric.less_equal(x,y), less_equal(xm, ym))
alltest(Numeric.greater_equal(x,y), greater_equal(xm, ym))
alltest(Numeric.conjugate(x), conjugate(xm))
alltest(Numeric.concatenate((x,y)), concatenate((xm,ym)))
alltest(Numeric.concatenate((x,y)), concatenate((x,y)))
alltest(Numeric.concatenate((x,y)), concatenate((xm,y)))
alltest(Numeric.concatenate((x,y,x)), concatenate((x,ym,x)))
ott = array([0.,1.,2.,3.], mask=[1,0,0,0])
assert isinstance(count(ott), types.IntType)
alltest(3, count(ott))
alltest(1, count(1))
alltest(0, array(1,mask=[1]))
ott.shape = (2,2)
assert isMaskedArray(count(ott,0))
assert isinstance(count(ott), types.IntType)
alltest(3, count(ott))
assert getmask(count(ott,0)) is None
alltest([1,2],count(ott,0))
xr = Numeric.ravel(x) #max doesn't work if shaped
xmr = ravel(xm)
alltest(max(xr), maximum(xmr)) #true because of careful selection of data
alltest(min(xr), minimum(xmr)) #true because of careful selection of data
alltest(Numeric.add.reduce(x), add.reduce(x))
alltest(Numeric.add.accumulate(x), add.accumulate(x))
alltest(4, sum(array(4)))
alltest(4, sum(array(4), axis=0))
alltest(Numeric.sum(x), sum(x))
alltest(Numeric.sum(filled(xm,0)), sum(xm))
alltest(Numeric.sum(x,0), sum(x,0))
alltest(Numeric.product(x), product(x))
alltest(Numeric.product(x,0), product(x,0))
alltest(Numeric.product(filled(xm,1)), product(xm))
if len(s) > 1:
alltest(Numeric.concatenate((x,y),1), concatenate((xm,ym),1))
alltest(Numeric.add.reduce(x,1), add.reduce(x,1))
alltest(Numeric.sum(x,1), sum(x,1))
alltest(Numeric.product(x,1), product(x,1))
