class MatrixUDTTests(MLlibTestCase):
dm1 = DenseMatrix(3, 2, [0, 1, 4, 5, 9, 10])
dm2 = DenseMatrix(3, 2, [0, 1, 4, 5, 9, 10], isTransposed=True)
sm1 = SparseMatrix(1, 1, [0, 1], [0], [2.0])
sm2 = SparseMatrix(2, 1, [0, 0, 1], [0], [5.0], isTransposed=True)
udt = MatrixUDT()
def test_json_schema(self):
self.assertEqual(MatrixUDT.fromJson(self.udt.jsonValue()), self.udt)
def test_serialization(self):
for m in [self.dm1, self.dm2, self.sm1, self.sm2]:
self.assertEqual(m, self.udt.deserialize(self.udt.serialize(m)))
def test_infer_schema(self):
rdd = self.sc.parallelize([("dense", self.dm1), ("sparse", self.sm1)])
df = rdd.toDF()
schema = df.schema
self.assertTrue(schema.fields[1].dataType, self.udt)
matrices = df.rdd.map(lambda x: x._2).collect()
self.assertEqual(len(matrices), 2)
for m in matrices:
if isinstance(m, DenseMatrix):
self.assertTrue(m, self.dm1)
elif isinstance(m, SparseMatrix):
self.assertTrue(m, self.sm1)
else:
raise ValueError("Expected a matrix but got type %r" % type(m))
def _transform(self, data, X):
logger.info("Transforming data")
loadings = self.model.loadings[:self.n_components]
loadings = DenseMatrix(X.numCols(), self.n_components,
loadings.flatten())
X = X.multiply(loadings)
data = join(data, X, self.spark)
del X
return data
def fourier(X: RowMatrix, n_features, seed=23, gamma=1):
p = X.numCols()
random_state = numpy.random.RandomState(seed)
w = numpy.sqrt(2 * gamma) * random_state.normal(size=(p, n_features))
w = DenseMatrix(p, n_features, w.flatten(), isTransposed=True)
b = random_state.uniform(0, 2 * numpy.pi, size=n_features)
Y = fourier_transform(X, w, b)
return Y, w, b
def _transform(self, data):
logger.info("Transforming data")
W = self.model.loadings[:, :self.n_components]
W = DenseMatrix(numRows=W.shape[0],
numCols=W.shape[1],
isTransposed=True,
values=W.flatten())
X = self._row_matrix(data).multiply(W)
data = join(data, X, self.spark)
del X
return data
def test_repr_dense_matrix(self):
mat = DenseMatrix(3, 2, [0, 1, 4, 6, 8, 10])
self.assertTrue(repr(mat), "DenseMatrix(3, 2, [0.0, 1.0, 4.0, 6.0, 8.0, 10.0], False)")
mat = DenseMatrix(3, 2, [0, 1, 4, 6, 8, 10], True)
self.assertTrue(repr(mat), "DenseMatrix(3, 2, [0.0, 1.0, 4.0, 6.0, 8.0, 10.0], False)")
mat = DenseMatrix(6, 3, zeros(18))
self.assertTrue(
repr(mat),
"DenseMatrix(6, 3, [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, ..., \
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0], False)",
)
def main():
datasetfile = sys.argv[1]
beta = 0.8
iterations = 40
top_k = 5
sparkcontext = SparkContext("local", "Page Rank")
data = sparkcontext.textFile(datasetfile)
source_dest = data.map(make_key_value_pair_1)
source_dest_count = data.map(make_key_value_pair_2)
groupbykey = source_dest.groupByKey()
number_of_nodes = groupbykey.count()
out_degree = groupbykey.map(calc_out_degree)
pair_map = groupbykey.collectAsMap()
matrix_m = np.zeros(shape=(number_of_nodes, number_of_nodes))
for key, value in pair_map.items():
for ind_value in value:
matrix_m[ind_value - 1][key - 1] += 1 / len(list(value))
matrix_m = sparkcontext.parallelize(matrix_m)
matrix_m = RowMatrix(matrix_m)
vector_r_prev = np.empty([number_of_nodes, 1])
vector_r_prev.fill(1 / number_of_nodes)
vector_r_prev = DenseMatrix(number_of_nodes, 1, vector_r_prev)
index = 0
while (index < iterations):
mul_val = matrix_m.multiply(vector_r_prev).rows.collect()
mul_val = [i * beta for i in mul_val]
mul_val = [i + (1 - beta) / number_of_nodes for i in mul_val]
vector_r_prev = DenseMatrix(number_of_nodes, 1, mul_val)
index += 1
vector_r_prev = vector_r_prev.toArray()
largest_values = heapq.nlargest(top_k, vector_r_prev)
largest_indexes = heapq.nlargest(top_k, range(number_of_nodes),
vector_r_prev.__getitem__)
smallest_values = heapq.nsmallest(top_k, vector_r_prev)
smallest_indexes = heapq.nsmallest(top_k, range(number_of_nodes),
vector_r_prev.__getitem__)
largest_indexes = [val + 1 for val in largest_indexes]
smallest_indexes = [val + 1 for val in smallest_indexes]
print("Value of largest n nodes\n", largest_values)
print("Node numbers of largest n nodes\n", largest_indexes)
print("Value of smallest n nodes\n", smallest_values)
print("Node numbers of smallest n nodes\n", smallest_indexes)
sparkcontext.stop()
def test_dense_matrix_is_transposed(self):
mat1 = DenseMatrix(3, 2, [0, 4, 1, 6, 3, 9], isTransposed=True)
mat = DenseMatrix(3, 2, [0, 1, 3, 4, 6, 9])
self.assertEqual(mat1, mat)
expected = [[0, 4], [1, 6], [3, 9]]
for i in range(3):
for j in range(2):
self.assertEqual(mat1[i, j], expected[i][j])
self.assertTrue(array_equal(mat1.toArray(), expected))
sm = mat1.toSparse()
self.assertTrue(array_equal(sm.rowIndices, [1, 2, 0, 1, 2]))
self.assertTrue(array_equal(sm.colPtrs, [0, 2, 5]))
self.assertTrue(array_equal(sm.values, [1, 3, 4, 6, 9]))
def _transform(self, data, X):
logger.info("Transforming data")
loadings = self.model.loadings.T
L = DenseMatrix(numRows=loadings.shape[0], numCols=loadings.shape[1],
values=loadings.flatten(), isTransposed=True)
data = join(data, X.multiply(L), self.spark)
return data
def _fit(self, dataset):
sc = SparkContext.getOrCreate()
x = dataset.select(self.getFeaturesCol())
rddv = x.rdd.map(list)
#calculate distance amtrix
Aarr = self._dist_matrix(rddv, rddv, sc)
np.fill_diagonal(Aarr, 0)
D = list(map(lambda x: np.sum(x), Aarr))
Darr = np.diag(np.sqrt(np.divide(1, D)))
#Laplacian matrix
Ln = D - Aarr
#Normalize
Ln = np.matmul(np.matmul(Darr, Ln), Darr)
#Eigenvectors
V, U = spark_eigen.eigen(Ln, sc, self.getTolerance())
#K-Rank reduction
K = self.getK()
U.rows.count()
proj = U.rows.map(lambda x: [x[i] for i in range(0, K)])
densep = DenseMatrix(
proj.count(), K,
functools.reduce(operator.iconcat, proj.collect(), []), True)
return SpectralClusteringModel(featuresCol=self.getFeaturesCol(),
predictionCol=self.getPredictionCol(),
projection=densep,
prevdata=rddv)
def NpToDense(arr):
'''
turn numpy array to Pyspark Dense Matrix so that matrix multiplication could be done
:param arr: a numpy array
'''
nrows, ncols = arr.shape
return DenseMatrix(nrows, ncols, arr.flatten(), 1)
def test_serialize(self):
self._test_serialize(DenseVector(range(10)))
self._test_serialize(DenseVector(array([1., 2., 3., 4.])))
self._test_serialize(DenseVector(pyarray.array('d', range(10))))
self._test_serialize(SparseVector(4, {1: 1, 3: 2}))
self._test_serialize(SparseVector(3, {}))
self._test_serialize(DenseMatrix(2, 3, range(6)))
def to_dense(rowmatrix):
densev = rowmatrix.rows.collect()
el = lambda x: [a for a in x]
M = list(map(el, densev))
L = functools.reduce(operator.iconcat, M, [])
return DenseMatrix(rowmatrix.numRows(), rowmatrix.numCols(), L, True)
def test_ml_mllib_matrix_conversion(self):
# to ml
# dense
mllibDM = Matrices.dense(2, 2, [0, 1, 2, 3])
mlDM1 = newlinalg.Matrices.dense(2, 2, [0, 1, 2, 3])
mlDM2 = mllibDM.asML()
self.assertEqual(mlDM2, mlDM1)
# transposed
mllibDMt = DenseMatrix(2, 2, [0, 1, 2, 3], True)
mlDMt1 = newlinalg.DenseMatrix(2, 2, [0, 1, 2, 3], True)
mlDMt2 = mllibDMt.asML()
self.assertEqual(mlDMt2, mlDMt1)
# sparse
mllibSM = Matrices.sparse(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4])
mlSM1 = newlinalg.Matrices.sparse(2, 2, [0, 2, 3], [0, 1, 1],
[2, 3, 4])
mlSM2 = mllibSM.asML()
self.assertEqual(mlSM2, mlSM1)
# transposed
mllibSMt = SparseMatrix(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4], True)
mlSMt1 = newlinalg.SparseMatrix(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4],
True)
mlSMt2 = mllibSMt.asML()
self.assertEqual(mlSMt2, mlSMt1)
# from ml
# dense
mllibDM1 = Matrices.dense(2, 2, [1, 2, 3, 4])
mlDM = newlinalg.Matrices.dense(2, 2, [1, 2, 3, 4])
mllibDM2 = Matrices.fromML(mlDM)
self.assertEqual(mllibDM1, mllibDM2)
# transposed
mllibDMt1 = DenseMatrix(2, 2, [1, 2, 3, 4], True)
mlDMt = newlinalg.DenseMatrix(2, 2, [1, 2, 3, 4], True)
mllibDMt2 = Matrices.fromML(mlDMt)
self.assertEqual(mllibDMt1, mllibDMt2)
# sparse
mllibSM1 = Matrices.sparse(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4])
mlSM = newlinalg.Matrices.sparse(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4])
mllibSM2 = Matrices.fromML(mlSM)
self.assertEqual(mllibSM1, mllibSM2)
# transposed
mllibSMt1 = SparseMatrix(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4], True)
mlSMt = newlinalg.SparseMatrix(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4],
True)
mllibSMt2 = Matrices.fromML(mlSMt)
self.assertEqual(mllibSMt1, mllibSMt2)
def _compute_w_row(self, Xw, w, W, idx):
g, gd = self._exp(Xw.multiply(DenseMatrix(len(w), 1, w)))
w_new = column_means(elementwise_product(Xw, g, self.spark))
del g
w_new = w_new - gd * w
w_new = gs_decorrelate(w_new, W, idx)
w_new /= scipy.sqrt((w_new**2).sum())
return w_new
def test_serialize(self):
self._test_serialize(DenseVector(range(10)))
self._test_serialize(DenseVector(array([1.0, 2.0, 3.0, 4.0])))
self._test_serialize(DenseVector(pyarray.array("d", range(10))))
self._test_serialize(SparseVector(4, {1: 1, 3: 2}))
self._test_serialize(SparseVector(3, {}))
self._test_serialize(DenseMatrix(2, 3, range(6)))
sm1 = SparseMatrix(3, 4, [0, 2, 2, 4, 4], [1, 2, 1, 2], [1.0, 2.0, 4.0, 5.0])
self._test_serialize(sm1)
def decorator(row):
for i in xrange(len(schema)):
if type(schema[i][1]) == _Matrix:
shape = row[i].shape
# By default Mllib DenseMatrix constructs column-major matrix.
# So Transposing ndarray to maintain consistency
arr = row[i].transpose().flatten()
row[i] = DenseMatrix(shape[0], shape[1], arr)
return row
def test_matrix_indexing(self):
mat = DenseMatrix(3, 2, [0, 1, 4, 6, 8, 10])
expected = [[0, 6], [1, 8], [4, 10]]
for i in range(3):
for j in range(2):
self.assertEqual(mat[i, j], expected[i][j])
for i, j in [(-1, 0), (4, 1), (3, 4)]:
self.assertRaises(IndexError, mat.__getitem__, (i, j))
def test_ml_mllib_matrix_conversion(self):
# to ml
# dense
mllibDM = Matrices.dense(2, 2, [0, 1, 2, 3])
mlDM1 = newlinalg.Matrices.dense(2, 2, [0, 1, 2, 3])
mlDM2 = mllibDM.asML()
self.assertEqual(mlDM2, mlDM1)
# transposed
mllibDMt = DenseMatrix(2, 2, [0, 1, 2, 3], True)
mlDMt1 = newlinalg.DenseMatrix(2, 2, [0, 1, 2, 3], True)
mlDMt2 = mllibDMt.asML()
self.assertEqual(mlDMt2, mlDMt1)
# sparse
mllibSM = Matrices.sparse(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4])
mlSM1 = newlinalg.Matrices.sparse(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4])
mlSM2 = mllibSM.asML()
self.assertEqual(mlSM2, mlSM1)
# transposed
mllibSMt = SparseMatrix(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4], True)
mlSMt1 = newlinalg.SparseMatrix(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4], True)
mlSMt2 = mllibSMt.asML()
self.assertEqual(mlSMt2, mlSMt1)
# from ml
# dense
mllibDM1 = Matrices.dense(2, 2, [1, 2, 3, 4])
mlDM = newlinalg.Matrices.dense(2, 2, [1, 2, 3, 4])
mllibDM2 = Matrices.fromML(mlDM)
self.assertEqual(mllibDM1, mllibDM2)
# transposed
mllibDMt1 = DenseMatrix(2, 2, [1, 2, 3, 4], True)
mlDMt = newlinalg.DenseMatrix(2, 2, [1, 2, 3, 4], True)
mllibDMt2 = Matrices.fromML(mlDMt)
self.assertEqual(mllibDMt1, mllibDMt2)
# sparse
mllibSM1 = Matrices.sparse(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4])
mlSM = newlinalg.Matrices.sparse(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4])
mllibSM2 = Matrices.fromML(mlSM)
self.assertEqual(mllibSM1, mllibSM2)
# transposed
mllibSMt1 = SparseMatrix(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4], True)
mlSMt = newlinalg.SparseMatrix(2, 2, [0, 2, 3], [0, 1, 1], [2, 3, 4], True)
mllibSMt2 = Matrices.fromML(mlSMt)
self.assertEqual(mllibSMt1, mllibSMt2)
def to_local_matrix(self):
"""
Converts the LD matrix to a local Spark matrix.
.. caution::
Only call this method when the LD matrix is small enough to fit in local memory on the driver.
:return: Matrix of Pearson correlation values.
:rtype: `Matrix <https://spark.apache.org/docs/2.1.0/api/python/pyspark.mllib.html#pyspark.mllib.linalg.Matrix>`__
"""
j_local_mat = self._jldm.toLocalMatrix()
return DenseMatrix(j_local_mat.numRows(), j_local_mat.numCols(),
list(j_local_mat.toArray()),
j_local_mat.isTransposed())
def decorator(row):
result = []
from pyspark.mllib.linalg import DenseMatrix
for i in xrange(len(schema)):
if type(schema[i][1]) == dtypes._Matrix:
shape = row[i].shape
arr = row[i].flatten()
# By default Mllib DenseMatrix constructs column-major matrix.
# Setting isTranposed=True, will construct row-major DenseMatrix
dm = DenseMatrix(shape[0],
shape[1],
arr,
isTransposed=True)
result.append(dm)
else:
result.append(row[i])
return result
def test_eq(self):
v1 = DenseVector([0.0, 1.0, 0.0, 5.5])
v2 = SparseVector(4, [(1, 1.0), (3, 5.5)])
v3 = DenseVector([0.0, 1.0, 0.0, 5.5])
v4 = SparseVector(6, [(1, 1.0), (3, 5.5)])
v5 = DenseVector([0.0, 1.0, 0.0, 2.5])
v6 = SparseVector(4, [(1, 1.0), (3, 2.5)])
dm1 = DenseMatrix(2, 2, [2, 0, 0, 0])
sm1 = SparseMatrix(2, 2, [0, 2, 3], [0], [2])
self.assertEqual(v1, v2)
self.assertEqual(v1, v3)
self.assertFalse(v2 == v4)
self.assertFalse(v1 == v5)
self.assertFalse(v1 == v6)
# this is done as Dense and Sparse matrices can be semantically
# equal while still implementing a different __eq__ method
self.assertEqual(dm1, sm1)
self.assertEqual(sm1, dm1)
def to_local_matrix(self):
"""
Converts the LD matrix to a local Spark matrix.
.. caution::
Only call this method when the LD matrix is small enough to fit in local memory on the driver.
:return: Matrix of Pearson correlation values.
:rtype: `Matrix <https://spark.apache.org/docs/2.1.0/api/python/pyspark.mllib.html#pyspark.mllib.linalg.MatrixTable>`__
"""
from pyspark.mllib.linalg import DenseMatrix
j_local_mat = self._jldm.toLocalMatrix()
assert j_local_mat.majorStride() == j_local_mat.rows()
assert j_local_mat.offset() == 0
assert j_local_mat.isTranspose() == False
return DenseMatrix(j_local_mat.rows(), j_local_mat.cols(), list(j_local_mat.data()), False)
def multiply_matrices(A: np.ndarray, B: np.ndarray) -> np.ndarray:
global counter
print()
print("No." + str(counter) + " matrix multiplication starts")
start_time = time.time()
print("matrix shape:", A.shape)
rddA = sc.parallelize(A.tolist())
matA = RowMatrix(rddA)
matB = DenseMatrix(B.shape[0],
B.shape[1],
B.flatten().tolist(),
isTransposed=True)
matC = matA.multiply(matB)
rows = matC.rows.collect()
res = np.array([row.toArray() for row in rows])
elapsed_time = time.time() - start_time
print("No." + str(counter) + " matrix multiplication ends, takes time:",
elapsed_time)
counter = counter + 1
return res
def _whiten(self, X):
s, v, _ = svd(X, X.numCols())
K = (v.T / s)[:, :self.n_components]
S = K * scipy.sqrt(X.numRows())
S = DenseMatrix(S.shape[0], S.shape[1], S.flatten(), True)
return X.multiply(S), K
def test_matrix_indexing(self):
mat = DenseMatrix(3, 2, [0, 1, 4, 6, 8, 10])
expected = [[0, 6], [1, 8], [4, 10]]
for i in range(3):
for j in range(2):
self.assertEquals(mat[i, j], expected[i][j])
def calculate_distance(self, sdf1, sdf2):
"""
This will calculate the distance between the vector-type columns of two spark dataframes
:param sdf1: This is to have a columns id1 (dtype int) and v1 (dtype Vector)
:param sdf2: This is to have a columns id2 (dtype int) and v2 (dtype Vector)
:return:
"""
cov = RowMatrix(
sdf1.select(["v1"]).withColumnRenamed("v1", "v").union(
sdf2.select(["v2"]).withColumnRenamed(
"v2", "v")).rdd.map(lambda row: Vectors.fromML(row.asDict(
)["v"]))).computeCovariance().toArray()
x, v = np.linalg.eigh(cov)
indices = 1e-10 <= x
# we are trying to enfore the data types to be only python types
n = int(v.shape[0])
m = int(indices.sum())
v_vals = [float(val) for val in v[:, indices].reshape(-1, ).tolist()]
v_spark = DenseMatrix(n, m, v_vals)
x_vals = [
float(val)
for val in np.diag(x[indices]**-0.5).reshape(-1, ).tolist()
]
x_spark = DenseMatrix(m, m, x_vals)
# we get the index to maintain the order
_sdf1 = sdf1.rdd.zipWithIndex()\
.map(lambda val_key: Row(id1=val_key[0].id1, v1=val_key[0].v1, index=val_key[1])).toDF()
_sdf1.persist()
_sdf2 = sdf2.rdd.zipWithIndex()\
.map(lambda val_key: Row(id2=val_key[0].id2, v2=val_key[0].v2, index=val_key[1])).toDF()
_sdf2.persist()
# we get our indexed row matrix
_sdf1_mat = IndexedRowMatrix(
_sdf1.rdd.map(lambda row: IndexedRow(index=row.asDict()["index"],
vector=Vectors.fromML(
row.asDict()["v1"]))))
_sdf2_mat = IndexedRowMatrix(
_sdf2.rdd.map(lambda row: IndexedRow(index=row.asDict()["index"],
vector=Vectors.fromML(
row.asDict()["v2"]))))
# we apply our transformation and then set it as our new variable
_sdf1 = _sdf1.drop("v1").join(_sdf1_mat.multiply(v_spark).multiply(x_spark).rows\
.map(lambda indexed_row: Row(index=indexed_row.index,
v1=indexed_row.vector)).toDF(), "index")
_sdf2 = _sdf2.drop("v2").join(_sdf2_mat.multiply(v_spark).multiply(x_spark).rows\
.map(lambda indexed_row: Row(index=indexed_row.index,
v2=indexed_row.vector)).toDF(), "index")
@F.udf(DoubleType(), VectorUDT())
def tmp(vec):
return float(vec[0].squared_distance(vec[1]))**0.5
all_sdf = _sdf1.crossJoin(_sdf2)
dist_sdf = all_sdf.select("*", tmp(F.array('v1', 'v2')).alias('diff'))
dist_sdf.persist()
return dist_sdf
model = als.fit(ratings)
#Embeddings
a = model.itemFactors
b = a.sort("id")
b.show()
#Creating a dense matrix from embedding for businesses
values = (b.rdd.map(lambda x: (x.id, x.features)).sortByKey().flatMap(
lambda (x, y): y).collect())
nrow = len(b.rdd.map(lambda x: x.features).first())
ncol = b.count()
dm = DenseMatrix(nrow, ncol, values)
dm.toArray().shape
z = dm.toArray().transpose()
#t-sne
tsne = TSNE(n_components=2)
X_tsne = tsne.fit_transform(z)
# creating data frame with t-sne results and business_id
e = sqlContext.createDataFrame(pd.DataFrame(X_tsne))
e_df = e.toPandas()
j = b.select("id")
j_df = j.toPandas()
result = pd.concat([e_df, j_df], axis=1, ignore_index=True)
result = pd.DataFrame(result)
tf_matrix2 = tf_matrix1.map(lambda i: [int(token) for token in i]) tf_matrix3 = tf_matrix2.map(lambda i: np.array(i)) tf_matrix4 = tf_matrix3.map(lambda i: (len(i), np.nonzero(i)[0], i[i!=0])) tf_matrix5 = tf_matrix4.map(lambda i: Vectors.sparse(i[0], i[1], i[2])) # 1min 49s , all the above process tf_matrix5.cache() row_tf_matrix = RowMatrix(tf_matrix5) random_matrix = DenseMatrix(WORDS_COUNT, K+P, np.random.randn(WORDS_COUNT * (K+P))) # local matrix Y = row_tf_matrix.multiply(random_matrix) # 38.5 s, Y is a rowmatrix(a distriuted matrix) # ============== QR Y_rdd = Y.rows # 17.5ms Y_rdd_with_index = Y_rdd.zipWithIndex() # 1min 48s Y_grouped = Y_rdd_with_index.groupBy(lambda i: i[1]/500) # 41.1ms def build_matris(tupl): iterables = tupl[1] result = list() for vec in iterables: ary = vec[0].toArray() result.append(ary)