Example usage for org.apache.commons.math3.complex Complex atan

Introduction

In this page you can find the example usage for org.apache.commons.math3.complex Complex atan.

Prototype

public Complex atan() 

Source Link

Document

Compute the <a href="http://mathworld.wolfram.com/InverseTangent.html" TARGET="_top"> inverse tangent</a> of this complex number.

Usage

From source file:com.autsia.bracer.BracerParser.java

/**
 * Evaluates once parsed math expression with "var" variable included
 *
 * @param variableValue User-specified <code>Double</code> value
 * @return <code>String</code> representation of the result
 * @throws <code>ParseException</code> if the input expression is not
 *                                     correct
 * @since 3.0//w ww.j  a  va2s .  c  om
 */
public String evaluate(double variableValue) throws ParseException {
    /* check if is there something to evaluate */
    if (stackRPN.empty()) {
        return "";
    }

    /* clean answer stack */
    stackAnswer.clear();

    /* get the clone of the RPN stack for further evaluating */
    @SuppressWarnings("unchecked")
    Stack<String> stackRPN = (Stack<String>) this.stackRPN.clone();

    /* enroll the variable value into expression */
    Collections.replaceAll(stackRPN, VARIABLE, Double.toString(variableValue));

    /* evaluating the RPN expression */
    while (!stackRPN.empty()) {
        String token = stackRPN.pop();
        if (isNumber(token)) {
            stackAnswer.push(token);
        } else if (isOperator(token)) {
            Complex a = complexFormat.parse(stackAnswer.pop());
            Complex b = complexFormat.parse(stackAnswer.pop());
            boolean aBoolean = a.getReal() == 1.0;
            boolean bBoolean = b.getReal() == 1.0;
            switch (token) {
            case "+":
                stackAnswer.push(complexFormat.format(b.add(a)));
                break;
            case "-":
                stackAnswer.push(complexFormat.format(b.subtract(a)));
                break;
            case "*":
                stackAnswer.push(complexFormat.format(b.multiply(a)));
                break;
            case "/":
                stackAnswer.push(complexFormat.format(b.divide(a)));
                break;
            case "|":
                stackAnswer.push(String.valueOf(aBoolean || bBoolean ? "1" : "0"));
                break;
            case "&":
                stackAnswer.push(String.valueOf(aBoolean && bBoolean ? "1" : "0"));
                break;
            }
        } else if (isFunction(token)) {
            Complex a = complexFormat.parse(stackAnswer.pop());
            boolean aBoolean = a.getReal() == 1.0;
            switch (token) {
            case "abs":
                stackAnswer.push(complexFormat.format(a.abs()));
                break;
            case "acos":
                stackAnswer.push(complexFormat.format(a.acos()));
                break;
            case "arg":
                stackAnswer.push(complexFormat.format(a.getArgument()));
                break;
            case "asin":
                stackAnswer.push(complexFormat.format(a.asin()));
                break;
            case "atan":
                stackAnswer.push(complexFormat.format(a.atan()));
                break;
            case "conj":
                stackAnswer.push(complexFormat.format(a.conjugate()));
                break;
            case "cos":
                stackAnswer.push(complexFormat.format(a.cos()));
                break;
            case "cosh":
                stackAnswer.push(complexFormat.format(a.cosh()));
                break;
            case "exp":
                stackAnswer.push(complexFormat.format(a.exp()));
                break;
            case "imag":
                stackAnswer.push(complexFormat.format(a.getImaginary()));
                break;
            case "log":
                stackAnswer.push(complexFormat.format(a.log()));
                break;
            case "neg":
                stackAnswer.push(complexFormat.format(a.negate()));
                break;
            case "real":
                stackAnswer.push(complexFormat.format(a.getReal()));
                break;
            case "sin":
                stackAnswer.push(complexFormat.format(a.sin()));
                break;
            case "sinh":
                stackAnswer.push(complexFormat.format(a.sinh()));
                break;
            case "sqrt":
                stackAnswer.push(complexFormat.format(a.sqrt()));
                break;
            case "tan":
                stackAnswer.push(complexFormat.format(a.tan()));
                break;
            case "tanh":
                stackAnswer.push(complexFormat.format(a.tanh()));
                break;
            case "pow":
                Complex b = complexFormat.parse(stackAnswer.pop());
                stackAnswer.push(complexFormat.format(b.pow(a)));
                break;
            case "not":
                stackAnswer.push(String.valueOf(!aBoolean ? "1" : "0"));
                break;
            }
        }
    }

    if (stackAnswer.size() > 1) {
        throw new ParseException("Some operator is missing", 0);
    }

    return stackAnswer.pop();
}

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From source file:com.calc.BracerParser.java

/**
 * Evaluates once parsed math expression with "var" variable included
 *
 * @param variableValue User-specified <code>Double</code> value
 * @return <code>String</code> representation of the result
 * @throws <code>ParseException</code> if the input expression is not
 *                                     correct
 * @since 3.0/*ww w  . ja  v  a  2  s . c o m*/
 */
public String evaluate(double variableValue) throws ParseException {
    /* check if is there something to evaluate */
    if (stackRPN.empty()) {
        return "";
    }

    /* clean answer stack */
    stackAnswer.clear();

    /* get the clone of the RPN stack for further evaluating */
    @SuppressWarnings("unchecked")
    Stack<String> stackRPN = (Stack<String>) this.stackRPN.clone();

    /* enroll the variable value into expression */
    Collections.replaceAll(stackRPN, VARIABLE, Double.toString(variableValue));

    /* evaluating the RPN expression */
    while (!stackRPN.empty()) {
        String token = stackRPN.pop();
        if (isNumber(token)) {
            stackAnswer.push(token);
        } else if (isOperator(token)) {
            Complex a = complexFormat.parse(stackAnswer.pop());
            Complex b = complexFormat.parse(stackAnswer.pop());
            boolean aBoolean = a.getReal() == 1.0;
            boolean bBoolean = b.getReal() == 1.0;
            switch (token) {
            case "+":
                stackAnswer.push(complexFormat.format(b.add(a)));
                break;
            case "-":
                stackAnswer.push(complexFormat.format(b.subtract(a)));
                break;
            case "*":
                stackAnswer.push(complexFormat.format(b.multiply(a)));
                break;
            case "/":
                stackAnswer.push(complexFormat.format(b.divide(a)));
                break;
            case "|":
                stackAnswer.push(String.valueOf(aBoolean || bBoolean ? "1" : "0"));
                break;
            case "&":
                stackAnswer.push(String.valueOf(aBoolean && bBoolean ? "1" : "0"));
                break;
            }
        } else if (isFunction(token)) {
            Complex a = complexFormat.parse(stackAnswer.pop());
            boolean aBoolean = a.getReal() == 1.0;
            switch (token) {
            case "fat":
                stackAnswer.push(complexFormat.format(a.abs()));
                break;
            case "fib":
                stackAnswer.push(complexFormat.format(a.acos()));
                break;
            case "arg":
                stackAnswer.push(complexFormat.format(a.getArgument()));
                break;
            case "asin":
                stackAnswer.push(complexFormat.format(a.asin()));
                break;
            case "atan":
                stackAnswer.push(complexFormat.format(a.atan()));
                break;
            case "conj":
                stackAnswer.push(complexFormat.format(a.conjugate()));
                break;
            case "cos":
                stackAnswer.push(complexFormat.format(a.cos()));
                break;
            case "cosh":
                stackAnswer.push(complexFormat.format(a.cosh()));
                break;
            case "exp":
                stackAnswer.push(complexFormat.format(a.exp()));
                break;
            case "imag":
                stackAnswer.push(complexFormat.format(a.getImaginary()));
                break;
            case "log":
                stackAnswer.push(complexFormat.format(a.log()));
                break;
            case "neg":
                stackAnswer.push(complexFormat.format(a.negate()));
                break;
            case "real":
                stackAnswer.push(complexFormat.format(a.getReal()));
                break;
            case "sin":
                stackAnswer.push(complexFormat.format(a.sin()));
                break;
            case "sinh":
                stackAnswer.push(complexFormat.format(a.sinh()));
                break;
            case "sqrt":
                stackAnswer.push(complexFormat.format(a.sqrt()));
                break;
            case "tan":
                stackAnswer.push(complexFormat.format(a.tan()));
                break;
            case "tanh":
                stackAnswer.push(complexFormat.format(a.tanh()));
                break;
            case "pow":
                Complex b = complexFormat.parse(stackAnswer.pop());
                stackAnswer.push(complexFormat.format(b.pow(a)));
                break;
            case "not":
                stackAnswer.push(String.valueOf(!aBoolean ? "1" : "0"));
                break;
            }
        }
    }

    if (stackAnswer.size() > 1) {
        throw new ParseException("Some operator is missing", 0);
    }

    return stackAnswer.pop();
}

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