92 lines
2.1 KiB
Python
92 lines
2.1 KiB
Python
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#!/usr/bin/env python3
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# coding: utf-8
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# # Adjacency Matrix
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import numpy as np
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from scipy.sparse import csr_matrix, lil_matrix, coo_matrix
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class adj_matrix(object):
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def __init__(self, symmetric_indices=False):
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self._sym = symmetric_indices
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if not symmetric_indices:
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self._x_labels = []
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self._y_labels = []
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self._x_label_index={}
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self._y_label_index={}
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else:
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self._labels = []
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self._label_index={}
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self._x = []
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self._y = []
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self._data = []
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self._mat = None
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def _get_ix(self, label):
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i = self._x_label_index.get(label)
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if i is None:
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i = len(self._x_labels)
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self._x_labels.append(label)
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self._x_label_index[label] = i
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return i
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def _get_iy(self, label):
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i = self._y_label_index.get(label)
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if i is None:
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i = len(self._y_labels)
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self._y_labels.append(label)
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self._y_label_index[label] = i
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return i
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def _get_i(self, label):
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i = self._label_index.get(label)
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if i is None:
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i = len(self._labels)
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self._labels.append(label)
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self._label_index[label] = i
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return i
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def add_entry(self, x, y, data):
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if self._sym:
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ix = self._get_i(x)
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iy = self._get_i(y)
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else:
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ix = self._get_ix(x)
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iy = self._get_iy(y)
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self._x.append(ix)
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self._y.append(iy)
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self._data.append(data)
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def compile_to_mat(self):
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if self._sym:
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sx = len(self._labels)
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sy = len(self._labels)
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else:
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sx = len(self._x_labels)
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sy = len(self._y_labels)
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self._mat = coo_matrix((self._data, (self._x, self._y)), shape=(sx,sy))
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return self._mat
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def get_csr(self):
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return self.compile_to_mat().tocsr()
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def get_labels(self):
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if self._sym:
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return self._labels
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return self._x_labels, self._y_labels
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