def weka_version():
"""
Determines the version of Weka in use.
:return: the version
:rtype: str
"""
jobj = JavaObject(JavaObject.new_instance(classname="weka.core.Version"))
return str(jobj)
def url(self):
"""
Returns the URL of the package.
:return: the url
:rtype: str
"""
return str(JavaObject(javabridge.call(self.jobject, "getPackageURL", "()Ljava/net/URL;")))
def weka_version():
"""
Determines the version of Weka in use.
:return: the version
:rtype: str
"""
jobj = JavaObject(JavaObject.new_instance(classname="weka.core.Version"))
return str(jobj)
def system_info():
"""
Returns a dictionary generated from the output of weka.core.SystemInfo.
:return: the system info as dictionary
:rtype: dict
"""
jobj = JavaObject.new_instance("weka.core.SystemInfo")
info = javabridge.call(jobj, "getSystemInfo", "()Ljava/util/Hashtable;")
return javabridge.jdictionary_to_string_dictionary(info)
def owner(self):
"""
Returns the owner of these capabilities, if any.
:return: the owner, can be None
:rtype: JavaObject
"""
obj = javabridge.call(self.jobject, "getOwner",
"()Lweka/core/CapabilitiesHandler;")
if obj is None:
return None
else:
return JavaObject(jobject=obj)
def generate_thresholdcurve_data(evaluation, class_index):
"""
Generates the threshold curve data from the evaluation object's predictions.
:param evaluation: the evaluation to obtain the predictions from
:type evaluation: Evaluation
:param class_index: the 0-based index of the class-label to create the plot for
:type class_index: int
:return: the generated threshold curve data
:rtype: Instances
"""
jtc = JavaObject.new_instance("weka.classifiers.evaluation.ThresholdCurve")
pred = javabridge.call(evaluation.jobject, "predictions", "()Ljava/util/ArrayList;")
result = Instances(
javabridge.call(jtc, "getCurve", "(Ljava/util/ArrayList;I)Lweka/core/Instances;", pred, class_index))
return result
def generate_thresholdcurve_data(evaluation, class_index):
"""
Generates the threshold curve data from the evaluation object's predictions.
:param evaluation: the evaluation to obtain the predictions from
:type evaluation: Evaluation
:param class_index: the 0-based index of the class-label to create the plot for
:type class_index: int
:return: the generated threshold curve data
:rtype: Instances
"""
jtc = JavaObject.new_instance("weka.classifiers.evaluation.ThresholdCurve")
pred = javabridge.call(evaluation.jobject, "predictions", "()Ljava/util/ArrayList;")
result = Instances(
javabridge.call(jtc, "getCurve", "(Ljava/util/ArrayList;I)Lweka/core/Instances;", pred, class_index))
return result
def main():
"""
Just runs some example code.
"""
# generic JavaObject stuff
helper.print_title("Generic stuff using weka.core.SystemInfo")
info = JavaObject(JavaObject.new_instance(classname="weka.core.SystemInfo"))
jwrapper = info.jwrapper
print("toString() method:")
print(jwrapper.toString())
# random
helper.print_title("Random")
rnd = Random(1)
for i in range(10):
print(rnd.next_double())
for i in range(10):
print(rnd.next_int(100))
# single index
helper.print_title("SingleIndex")
si = SingleIndex(index="first")
upper = 10
si.upper(upper)
print(str(si) + " (upper=" + str(upper) + ")\n -> " + str(si.index()))
si.single_index = "3"
si.upper(upper)
print(str(si) + " (upper=" + str(upper) + ")\n -> " + str(si.index()))
si.single_index = "last"
si.upper(upper)
print(str(si) + " (upper=" + str(upper) + ")\n -> " + str(si.index()))
# range
helper.print_title("Range")
rng = Range(ranges="first")
upper = 10
invert = False
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "3"
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "last"
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "first-last"
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "3,4,7-last"
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "3,4,7-last"
rng.upper(upper)
invert = True
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
# tag
helper.print_title("Tag")
tag = Tag(ident=1, ident_str="one")
print("tag=" + str(tag) + ", ident=" + str(tag.ident) + ", readable=" + tag.readable)
tag.ident = 3
print("tag=" + str(tag) + ", ident=" + str(tag.ident) + ", readable=" + tag.readable)
tag = Tag(ident=2, ident_str="two", readable="2nd tag")
print("tag=" + str(tag) + ", ident=" + str(tag.ident) + ", readable=" + tag.readable)
def main():
"""
Just runs some example code.
"""
# generic JavaObject stuff
helper.print_title("Generic stuff using weka.core.SystemInfo")
info = JavaObject(JavaObject.new_instance("weka.core.SystemInfo"))
jwrapper = info.jwrapper
print("toString() method:")
print(jwrapper.toString())
# random
helper.print_title("Random")
rnd = Random(1)
for i in xrange(10):
print(rnd.next_double())
for i in xrange(10):
print(rnd.next_int(100))
# single index
helper.print_title("SingleIndex")
si = SingleIndex(index="first")
upper = 10
si.upper(upper)
print(str(si) + " (upper=" + str(upper) + ")\n -> " + str(si.index()))
si.single_index = "3"
si.upper(upper)
print(str(si) + " (upper=" + str(upper) + ")\n -> " + str(si.index()))
si.single_index = "last"
si.upper(upper)
print(str(si) + " (upper=" + str(upper) + ")\n -> " + str(si.index()))
# range
helper.print_title("Range")
rng = Range(ranges="first")
upper = 10
invert = False
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "3"
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "last"
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "first-last"
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "3,4,7-last"
rng.upper(upper)
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
rng.ranges = "3,4,7-last"
rng.upper(upper)
invert = True
rng.invert = invert
print(str(rng.ranges) + " (upper=" + str(upper) + ", invert=" + str(invert) + ")\n -> " + str(rng.selection()))
# tag
helper.print_title("Tag")
tag = Tag(ident=1, ident_str="one")
print("tag=" + str(tag) + ", ident=" + str(tag.ident) + ", readable=" + tag.readable)
tag.ident = 3
print("tag=" + str(tag) + ", ident=" + str(tag.ident) + ", readable=" + tag.readable)
tag = Tag(ident=2, ident_str="two", readable="2nd tag")
print("tag=" + str(tag) + ", ident=" + str(tag.ident) + ", readable=" + tag.readable)
