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OpenML: exploring machine learning better, together. An open science platform for machine learning. German Credit Data Set Arff. Open the data/iris.arff Dataset Click the “ Open file” button to open a data set and double click on the “ data” directory. Weka provides a number of small common machine learning datasets that you can use to practice on. Select the “ iris.arff.
I am using weka data mining tool. In weka I am trying to use metacost classifier to classify my data. But while executing it, there is a error popup saying 'On-demand cost file doesn't exist'.
Anyone know how to create on-demand cost file?
German Credit Data Set Arff
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1 Answer
If you are using GUI, You need to create a cost matrix first. Use 'use explicit cost matrix' option, create a cost matrix from 'cost matrix' option. You can simply use this option to train your base classifier.
If you want cost file on demand option, save this cost file as 'relation name of the training data(arff file) '.cost' file.
When you select 'Load matrix on demand' in Weka GUI, provide it with a directory path on 'onDemand Directory' for the path where you have saved the cost file.
Remember that your name of the cost file must be 'relation name of the training data plus '.cost'. Now you can train your base classifier with on-demand cost.
Edit :For more details: http://weka.sourceforge.net/doc/weka/classifiers/meta/MetaCost.html
Its similar in weka API too.
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