def init_columns(self):
"""
Sets the column indices based on the supplied names if necessary.
"""
if self.columns_determined:
return
data = self.instances
if data is None:
print("No instances set, cannot determine columns!")
return
# dataset
if self.dataset_columns is None:
raise Exception("No dataset columns set!")
cols = ""
for name in self.dataset_columns:
att = data.attribute_by_name(name)
if att is None:
raise Exception("Dataset column not found: " + name)
if len(cols) > 0:
cols += ","
cols += str(att.index + 1)
javabridge.call(self.jobject, "setDatasetKeyColumns",
"(Lweka/core/Range;)V",
Range(ranges=cols).jobject)
# run
if self.run_column is None:
raise Exception("No run columnn set!")
att = data.attribute_by_name(self.run_column)
if att is None:
raise Exception("Run column not found: " + self.run_column)
javabridge.call(self.jobject, "setRunColumn", "(I)V", att.index)
# fold
if not self.fold_column is None:
att = data.attribute_by_name(self.fold_column)
if att is None:
index = -1
else:
index = att.index
javabridge.call(self.jobject, "setFoldColumn", "(I)V", index)
# result
if self._result_columns is None:
raise Exception("No reset columns set!")
cols = ""
for name in self._result_columns:
att = data.attribute_by_name(name)
if att is None:
raise Exception("Result column not found: " + name)
if len(cols) > 0:
cols += ","
cols += str(att.index + 1)
javabridge.call(self.jobject, "setResultsetKeyColumns",
"(Lweka/core/Range;)V",
Range(ranges=cols).jobject)
self.columns_determined = True
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)