def pmap1(f, x, w = 3):
n = x.shape[0]
def local_apply(i):
lower = __builtins__.max(i-w/2, 0)
upper = __builtins__.min(i+w/2+1, n)
elts = x[lower:upper]
return f(elts)
return imap(local_apply, n)
def pmap1(f, x, w=3):
n = x.shape[0]
def local_apply(i):
lower = __builtins__.max(i - w / 2, 0)
upper = __builtins__.min(i + w / 2 + 1, n)
elts = x[lower:upper]
return f(elts)
return imap(local_apply, n)
def pmap2(f, x, width=(3, 3)):
"""
Patch-map where the function can accept both interior windows
and smaller border windows
"""
width_x, width_y = width
n_rows, n_cols = x.shape
hx = width_x / 2
hy = width_y / 2
def local_apply((i, j)):
lx = __builtins__.max(i - hx, 0)
ux = __builtins__.min(i + hx + 1, n_rows)
ly = __builtins__.max(j - hy, 0)
uy = __builtins__.min(j + hy + 1, n_cols)
return f(x[lx:ux, ly:uy])
return imap(local_apply, x.shape)
def pmap2(f, x, width = (3,3)):
"""
Patch-map where the function can accept both interior windows
and smaller border windows
"""
width_x, width_y = width
n_rows, n_cols = x.shape
hx = width_x / 2
hy = width_y / 2
def local_apply((i,j)):
lx = __builtins__.max(i-hx, 0)
ux = __builtins__.min(i+hx+1, n_rows)
ly = __builtins__.max(j-hy, 0)
uy = __builtins__.min(j+hy+1, n_cols)
return f(x[lx:ux, ly:uy])
return imap(local_apply, x.shape)
def ones(shape, dtype = float64): one = dtype(1) return imap(lambda _: one, shape)
def zeros(shape, dtype = float64): zero = dtype(0) return imap(lambda _: zero, shape)
