From a multidimensional array to a flat array avoiding numpy. The code could be better?
Python, 44 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | class ndim: # from nD array to flat array
def __init__(self,arr_dim):
self.dimensions=arr_dim
print "***dimensions***"
print self.dimensions
self.numdimensions=len(arr_dim)
print "***numdimension***"
print self.numdimensions
self.gridsize=reduce(lambda x, y: x*y, arr_dim)
print self.gridsize
def getcellindex(self, location):
cindex = 0
cdrop = self.gridsize
for index in xrange(self.numdimensions):
cdrop /= self.dimensions[index]
cindex += cdrop * location[index]
return cindex
def getlocation(self, cellindex):
res = []
for size in reversed(self.dimensions):
res.append(cellindex % size)
cellindex /= size
return res[::-1]
# how to use ndim class
arr_dim = [3,3,2,2]
n=ndim(arr_dim)
print "*****n.getcellindex((0,0,0,0))"
print n.getcellindex((0,0,0,0))
print "*****n.getcellindex((0,0,1,1))"
print n.getcellindex((0,0,1,1))
print "*****n.getcellindex((0,1,0,0))"
print n.getcellindex((0,1,0,0))
print "*****n.getcellindex((2,2,1,1))"
print n.getcellindex((2,2,1,1))
print
print "*****n.getlocation(0) "
print n.getlocation(0)
print "*****n.getlocation(3) "
print n.getlocation(3)
print "*****n.getlocation(4) "
print n.getlocation(4)
print "*****n.getlocation(35) "
print n.getlocation(35)
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