You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
28 lines
892 B
28 lines
892 B
import os
|
|
import numpy as np
|
|
|
|
from cffi import FFI
|
|
from common.ffi_wrapper import suffix
|
|
|
|
cluster_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)))
|
|
cluster_fn = os.path.join(cluster_dir, "libfastcluster"+suffix())
|
|
|
|
ffi = FFI()
|
|
ffi.cdef("""
|
|
int hclust_fast(int n, double* distmat, int method, int* merge, double* height);
|
|
void cutree_cdist(int n, const int* merge, double* height, double cdist, int* labels);
|
|
void hclust_pdist(int n, int m, double* pts, double* out);
|
|
void cluster_points_centroid(int n, int m, double* pts, double dist, int* idx);
|
|
""")
|
|
|
|
hclust = ffi.dlopen(cluster_fn)
|
|
|
|
|
|
def cluster_points_centroid(pts, dist):
|
|
pts = np.ascontiguousarray(pts, dtype=np.float64)
|
|
pts_ptr = ffi.cast("double *", pts.ctypes.data)
|
|
n, m = pts.shape
|
|
|
|
labels_ptr = ffi.new("int[]", n)
|
|
hclust.cluster_points_centroid(n, m, pts_ptr, dist**2, labels_ptr)
|
|
return list(labels_ptr)
|
|
|