ValueError: No data set, Matrix is empty! about python-recsys

[ocelma]

Can you post the code where you load the data, and then compute SVD?

Thanks

On Tuesday, April 1, 2014, xiaoerlyl [email protected] wrote:

I have tried some data set, but if I call the functions svd.similarity()
or svd.recommend(), the ouput of the console is :

Traceback (most recent call last):
File "recsys_data.py", line 20, in
svd.compute(k=k, min_values=5, pre_normalize=None, mean_center=True,
post_normalize=True,savefile=None)
File
"/usr/local/lib/python2.7/dist-packages/python_recsys-0.2-py2.7.egg/recsys/algorithm/factorize.py",
line 244, in compute
super(SVD, self).compute(min_values)
File
"/usr/local/lib/python2.7/dist-packages/python_recsys-0.2-py2.7.egg/recsys/algorithm/baseclass.py",
line 126, in compute
raise ValueError('No data set. Matrix is empty!')
ValueError: No data set. Matrix is empty!

I want to konw why ?

Reply to this email directly or view it on GitHubhttps://github.com//issues/6
.

[cycchao]

According to the python-recsys v1.0 documentation Algorithms，i put movielens-1M ratiing.dat in /usr/local/python-recsys-master/recsys/data/movielens/,
,then i load data,!!!
but when i comput,ValueError: No data set. Matrix is empty!I want to konw why ?

from recsys.algorithm.factorize import SVD
filename = '/usr/local/python-recsys-master/recsys/data/movielens/ratings.dat'
svd = SVD()
svd.load_data(filename=filename, sep='::', format={'col':0, 'row':1, 'value':2, 'ids':int})

from recsys.datamodel.data import Data
from recsys.algorithm.factorize import SVD
filename = '/usr/local/python-recsys-master/recsys/data/movielens/ratings.dat'
data = Data()
format = {'col':0, 'row':1, 'value':2, 'ids': int}
data.load(filename, sep='::', format=format)
train, test = data.split_train_test(percent=80)
svd = SVD()
svd.set_data(train)

from recsys.utils.svdlibc import SVDLIBC
svdlibc = SVDLIBC('/usr/local/python-recsys-master/recsys/data/movielens/ratings.dat')
svdlibc.to_sparse_matrix(sep='::', format={'col':0, 'row':1, 'value':2, 'ids': int})
svdlibc.compute(k=100)
svd = svdlibc.export()

!!!
but when i comput,ValueError: No data set. Matrix is empty!I want to konw why ?

K=100
svd.compute(k=K, min_values=10, pre_normalize=None, mean_center=True, post_normalize=True,
savefile=None)
Traceback (most recent call last):
File "", line 3, in
File "recsys/algorithm/factorize.py", line 244, in compute
super(SVD, self).compute(min_values)
File "recsys/algorithm/baseclass.py", line 126, in compute
raise ValueError('No data set. Matrix is empty!')
ValueError: No data set. Matrix is empty!

[ocelma]

Duplicated issue #8