svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / numeric / ATanFunction.java @ 43989
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package org.gvsig.expressionevaluator.impl.function.numeric; |
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import org.apache.commons.lang3.Range; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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public class ATanFunction extends AbstractFunction { |
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public ATanFunction() {
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super("Numeric", "ATAN", Range.is(1), |
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"Returns the arc tangent of a value; the returned angle is in the range -pi/2 through pi/2. Special cases:\n" +
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"- If the argument is NaN, then the result is NaN.\n" +
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"- If the argument is zero, then the result is a zero with the same sign as the argument.\n" +
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"The computed result must be within 1 ulp of the exact result. Results must be semi-monotonic.\n",
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"ATAN({{a}})",
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new String[]{ |
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"a - the value whose arc tangent is to be returned."
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}, |
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"Double",
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true
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); |
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} |
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@Override
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public Object call(Interpreter interpreter, Object[] args) { |
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double r = Math.atan(getDouble(args, 0)); |
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return r;
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} |
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} |