mirror of
https://github.com/wassname/simpeg.git
synced 2026-06-27 22:38:37 +08:00
Rowan Cockett
128 lines
2.6 KiB
Python
128 lines
2.6 KiB
Python
from numpy import *
|
|
|
|
|
|
def diff(A, d):
|
|
if(d == 1):
|
|
return A[1:, :, :] - A[:-1, :, :]
|
|
elif(d == 2):
|
|
return A[:, 1:, :] - A[:, :-1, :]
|
|
else:
|
|
return A[:, :, 1:] - A[:, :, :-1]
|
|
#else:
|
|
# print('d must be 1,2 or 3')
|
|
|
|
|
|
def diffp(A, d1, d2):
|
|
if(d1 == 1 and d2 == 2):
|
|
return A[1:, 1:, :] - A[:-1, :-1, :]
|
|
elif(d1 == 1 and d2 == 3):
|
|
return A[1:, :, 1:] - A[:-1, :, :-1]
|
|
else:
|
|
return A[:, 1:, 1:] - A[:, :-1, :-1]
|
|
|
|
|
|
def diffm(A, d1, d2):
|
|
if(d1 == 3 and d2 == 2):
|
|
return A[:, :-1, 1:] - A[:, 1:, :-1]
|
|
elif(d1 == 1 and d2 == 3):
|
|
return A[1:, :, :-1] - A[:-1, :, 1:]
|
|
elif(d1 == 2 and d2 == 1):
|
|
return A[:-1, 1:, :] - A[1:, :-1, :]
|
|
else:
|
|
print('d must be 1, 2 or 3')
|
|
|
|
|
|
def ave(A, d):
|
|
if(d == 1):
|
|
return 0.5*(A[1:, :, :] + A[:-1, :, :])
|
|
elif(d == 2):
|
|
return 0.5*(A[:, 1:, :] + A[:, :-1, :])
|
|
elif(d == 3):
|
|
return 0.5*(A[:, :, 1:] + A[:, :, :-1])
|
|
else:
|
|
print('d must be 1,2 or 3')
|
|
|
|
|
|
def reshapeF(sp, d):
|
|
return reshape(sp, d, 'F')
|
|
|
|
|
|
def mkvc(A):
|
|
return reshape(A, [size(A), 1], 'F').flatten()
|
|
|
|
|
|
def ndgrid(x, y, z):
|
|
|
|
n1 = size(x)
|
|
n2 = size(y)
|
|
n3 = size(z)
|
|
X = zeros([n1, n2, n3])
|
|
Y = zeros([n1, n2, n3])
|
|
Z = zeros([n1, n2, n3])
|
|
for i in range(0, n2):
|
|
for j in range(0, n3):
|
|
X[:, i, j] = x
|
|
|
|
for i in range(0, n1):
|
|
for j in range(0, n3):
|
|
Y[i, :, j] = y
|
|
|
|
for i in range(0, n1):
|
|
for j in range(0, n2):
|
|
Z[i, j, :] = z
|
|
|
|
return (X, Y, Z)
|
|
|
|
|
|
def ind2sub(shape, ind):
|
|
# From the given shape, returns the subscrips of the given index
|
|
revshp = []
|
|
revshp.extend(shape)
|
|
mult = [1]
|
|
for i in range(0, len(revshp)-1):
|
|
mult.extend([mult[i]*revshp[i]])
|
|
mult = array(mult).reshape(len(mult))
|
|
|
|
sub = []
|
|
|
|
for i in range(0, len(shape)):
|
|
sub.extend([math.floor(ind / mult[i])])
|
|
ind = ind - (math.floor(ind/mult[i]) * mult[i])
|
|
return sub
|
|
|
|
|
|
def sub2ind(shape, subs):
|
|
# From the given shape, returns the index of the given subscript
|
|
revshp = list(shape)
|
|
mult = [1]
|
|
for i in range(0, len(revshp)-1):
|
|
mult.extend([mult[i]*revshp[i]])
|
|
mult = array(mult).reshape(len(mult), 1)
|
|
|
|
idx = dot((subs), (mult))
|
|
return idx
|
|
|
|
|
|
def mkmat(x):
|
|
return reshape(matrix(x), (size(x), 1), 'F')
|
|
|
|
|
|
def hstack3(a, b, c):
|
|
a = mkvc(a)
|
|
b = mkvc(b)
|
|
c = mkvc(c)
|
|
a = mkmat(a)
|
|
b = mkmat(b)
|
|
c = mkmat(c)
|
|
return hstack((hstack((a, b)), c))
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
|
X, Y, Z = mgrid[0:4, 0:5, 0:6]
|
|
|
|
print Z
|
|
|
|
t = ave(X, 1)
|
|
print t
|