Hi all,
I am new to python and pytables. Currently I am writing a project about
clustering and KNN algorithm. That is what I have got.
********************** code *******************************
import numpy.random as npr
import numpy as np
#step0: obtain the cluster
dtype = np.dtype('f4')
pnts_inds = np.arange(100)
npr.shuffle(pnts_inds)
pnts_inds = pnts_inds[:10]
pnts_inds = np.sort(pnts_inds)
for i,ind in enumerate(pnts_inds):
clusters[i] = pnts_obj[ind]
#step1: save the result to a HDF5 file called clst_fn.h5
filters = tables.Filters(complevel = 1, complib = 'zlib')
clst_fobj = tables.openFile('clst_fn.h5', 'w')
clst_obj = clst_fobj.createCArray(clst_fobj.root, 'clusters',
tables.Atom.from_dtype(dtype), clusters.shape,
filters = filters)
clst_obj[:] = clusters
clst_fobj.close()
#step2: other function
blabla
#step3: load the cluster from clst_fn
pnts_fobj= tables.openFile('clst_fn.h5','r')
for pnts in pnts_fobj.walkNodes('/', classname = 'Array'):
break
#############################
#step4: evoke another function (called knn). The function input argument is the
#data from pnts. I have checked the knn function individually. This function
#works well if the input is pnts = npr.rand(100,128)
def knn(pnts):
pnts = numpy.ascontiguousarray(pnts)
N = ctypes.c_uint(pnts.shape[0])
D = ctypes.c_uint(pnts.shape[1])
#############################
# evoke knn using the cluster from clst_fn (see step 3)
knn(pnts)
********************** end of code *******************************
My problem now is that python is giving me a hard time by showing:
error: IndexError: tuple index out of range
This error comes from
"D = ctypes.c_uint(pnts.shape[1])" this line.
Obviously, there must be something wrong with the input argument. Any thought
about fixing the problem? Thank you in advance.
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