/** Creates a MathExpression filter with the given expression */
protected Filter getFilter(String expression) {
MathExpression f = new MathExpression();
f.setExpression(expression);
f.setIgnoreRange("" + (m_AttIndex + 1));
f.setInvertSelection(true);
return f;
}
/**
* Parses a given list of options.
*
* <p>
* <!-- options-start -->
* Valid options are:
*
* <p>
*
* <pre> -unset-class-temporarily
* Unsets the class index temporarily before the filter is
* applied to the data.
* (default: no)</pre>
*
* <pre> -E <expression>
* Specify the expression to apply. Eg. pow(A,6)/(MEAN+MAX)
* Supported operators are +, -, *, /, pow, log,
* abs, cos, exp, sqrt, tan, sin, ceil, floor, rint, (, ),
* MEAN, MAX, MIN, SD, COUNT, SUM, SUMSQUARED, ifelse</pre>
*
* <pre> -R <index1,index2-index4,...>
* Specify list of columns to ignore. First and last are valid
* indexes. (default none)</pre>
*
* <pre> -V
* Invert matching sense (i.e. only modify specified columns)</pre>
*
* <!-- options-end -->
*
* @param options the list of options as an array of strings
* @throws Exception if an option is not supported
*/
public void setOptions(String[] options) throws Exception {
super.setOptions(options);
String expString = Utils.getOption('E', options);
if (expString.length() != 0) {
setExpression(expString);
} else {
setExpression(m_defaultExpression);
}
String ignoreList = Utils.getOption('R', options);
if (ignoreList.length() != 0) {
setIgnoreRange(ignoreList);
}
setInvertSelection(Utils.getFlag('V', options));
}