[48/50] [abbrv] incubator-systemml git commit: [SYSTEMML-1431] Throw controlled error when one-dimensional numpy array is passed to SystemML

[de...@apache.org]

[SYSTEMML-1431] Throw controlled error when one-dimensional numpy array is passed to SystemML

Here is an example pyspark session demonstrating this PR:
>>> from mlxtend.data import mnist_data
>>> import numpy as np
>>> from sklearn.utils import shuffle
X, y = mnist_data()
from systemml import MLContext, dml
ml = MLContext(sc)
script = dml('print(sum(X))').input(X=X)
ml.execute(script)
script = dml('print(sum(X))').input(X=y)
ml.execute(script)
script = dml('print(sum(X))').input(X=y.reshape(-1, 1))
ml.execute(script)>>> X, y = mnist_data()
>>> from systemml import MLContext, dml
>>> ml = MLContext(sc)

Welcome to Apache SystemML!

>>> script = dml('print(sum(X))').input(X=X)
>>> ml.execute(script)
1.31267102E8
MLResults
>>> script = dml('print(sum(X))').input(X=y)
>>> ml.execute(script)
...
TypeError: Expected 2-dimensional ndarray, instead passed 1-dimensional
ndarray. Hint: If you intend to pass the 1-dimensional ndarray as a
column-vector, please reshape it: input_ndarray.reshape(-1, 1)
>>> script = dml('print(sum(X))').input(X=y.reshape(-1, 1))
>>> ml.execute(script)
22500.0

Closes #438.


Project: http://git-wip-us.apache.org/repos/asf/incubator-systemml/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-systemml/commit/a1d73f80
Tree: http://git-wip-us.apache.org/repos/asf/incubator-systemml/tree/a1d73f80
Diff: http://git-wip-us.apache.org/repos/asf/incubator-systemml/diff/a1d73f80

Branch: refs/heads/gh-pages
Commit: a1d73f805bc6a94e953c0b999269b79fcbb07a16
Parents: 7407b70
Author: Niketan Pansare <np...@us.ibm.com>
Authored: Thu Mar 23 11:41:16 2017 -0700
Committer: Niketan Pansare <np...@us.ibm.com>
Committed: Thu Mar 23 11:44:33 2017 -0700

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 beginners-guide-python.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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http://git-wip-us.apache.org/repos/asf/incubator-systemml/blob/a1d73f80/beginners-guide-python.md
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diff --git a/beginners-guide-python.md b/beginners-guide-python.md
index ffab09e..24f7151 100644
--- a/beginners-guide-python.md
+++ b/beginners-guide-python.md
@@ -183,7 +183,7 @@ y_train = diabetes.target[:-20]
 y_test = diabetes.target[-20:]
 # Train Linear Regression model
 X = sml.matrix(X_train)
-y = sml.matrix(y_train)
+y = sml.matrix(np.matrix(y_train).T)
 A = X.transpose().dot(X)
 b = X.transpose().dot(y)
 beta = sml.solve(A, b).toNumPy()