Synopsis#

Performs a search of an arbitrary number of parameters of a classifier and chooses the best combination found. The properties being explored are totally up to the user.

E.g., if you have a FilteredClassifier selected as base classifier, sporting a PLSFilter and you want to explore the number of PLS components, then your property will be made up of the following components: - filter: referring to the FilteredClassifier's property (= PLSFilter) - numComponents: the actual property of the PLSFilter that we want to modify And assembled, the property looks like this: filter.numComponents

The best classifier setup can be accessed after the buildClassifier call via the getBestClassifier method.

The trace of setups evaluated can be accessed after the buildClassifier call as well, using the following methods: - getTrace() - getTraceSize() - getTraceValue(int) - getTraceFolds(int) - getTraceClassifierAsCli(int) - getTraceParameterSettings(int)

Using the weka.core.setupgenerator.ParameterGroup parameter, it is possible to group dependent parameters. In this case, all top-level parameters must be of type weka.core.setupgenerator.ParameterGroup.

Options#

• -E <ACC|JIDX|HSCORE|EM|JDIST|HLOSS|ZOLOSS|HARSCORE|OE|RLOSS|AVGPREC|LOGLOSSL|LOGLOSSD|F1MICRO|F1MACROEX|F1MACROLBL|AUPRC|AUROC|LCARD|LDIST>

  Determines the parameter used for evaluation: ACC = Accuracy JIDX = Jaccard index HSCORE = Hamming score EM = Exact match JDIST = Jaccard distance HLOSS = Hamming loss ZOLOSS = ZeroOne loss HARSCORE = Harmonic score OE = One error RLOSS = Rank loss AVGPREC = Avg precision LOGLOSSL = Log Loss (lim. L) LOGLOSSD = Log Loss (lim. D) F1MICRO = F1 (micro averaged) F1MACROEX = F1 (macro averaged by example) F1MACROLBL = F1 (macro averaged by label) AUPRC = AUPRC (macro averaged) AUROC = AUROC (macro averaged) LCARD = Label cardinality (predicted) LDIST = Levenshtein distance (default: ACC)

• -search "<classname options>"

  A property search setup.

• -algorithm "<classname options>"

  A search algorithm.

• -log-file <filename>

  The log file to log the messages to. (default: none)

• -S <num>

  Random number seed. (default 1)

• -W <classifier name>

  Full name of base classifier. (default: meka.classifiers.multilabel.RAkEL)

• -output-debug-info

  If set, classifier is run in debug mode and may output additional info to the console

• -do-not-check-capabilities

  If set, classifier capabilities are not checked before classifier is built (use with caution).

• -num-decimal-places

  The number of decimal places for the output of numbers in the model (default 2).

• -batch-size

  The desired batch size for batch prediction (default 100).

Options specific to classifier meka.classifiers.multilabel.RAkEL:

• -M <num>

  Sets M (default 10): the number of subsets

• -k <num>

  The number of labels k in each subset (must be 0 < k < L for L labels)

• -P <value>

  Sets the pruning value, defining an infrequent labelset as one which occurs <= P times in the data (P = 0 defaults to LC). default: 0 (LC)

• -N <value>

  Sets the (maximum) number of frequent labelsets to subsample from the infrequent labelsets. default: 0 (none) n N = n -n N = n, or 0 if LCard(D) >= 2 n-m N = random(n,m)

• -S <value>

  The seed value for randomization default: 0

• -W <classifier name>

  Full name of base classifier. (default: weka.classifiers.trees.J48)

• -output-debug-info

  If set, classifier is run in debug mode and may output additional info to the console

• -do-not-check-capabilities

  If set, classifier capabilities are not checked before classifier is built (use with caution).

• -num-decimal-places

  The number of decimal places for the output of numbers in the model (default 2).

• -batch-size

  The desired batch size for batch prediction (default 100).

Options specific to classifier weka.classifiers.trees.J48:

• -U

  Use unpruned tree.

• -O

  Do not collapse tree.

• -C <pruning confidence>

  Set confidence threshold for pruning. (default 0.25)

• -M <minimum number of instances>

  Set minimum number of instances per leaf. (default 2)

• -R

  Use reduced error pruning.

• -N <number of folds>

  Set number of folds for reduced error pruning. One fold is used as pruning set. (default 3)

• -B

  Use binary splits only.

• -S

  Do not perform subtree raising.

• -L

  Do not clean up after the tree has been built.

• -A

  Laplace smoothing for predicted probabilities.

• -J

  Do not use MDL correction for info gain on numeric attributes.

• -Q <seed>

  Seed for random data shuffling (default 1).

• -doNotMakeSplitPointActualValue

  Do not make split point actual value.

• -output-debug-info

  If set, classifier is run in debug mode and may output additional info to the console

• -do-not-check-capabilities

  If set, classifier capabilities are not checked before classifier is built (use with caution).

• -num-decimal-places

  The number of decimal places for the output of numbers in the model (default 2).

• -batch-size

  The desired batch size for batch prediction (default 100).