public RRaw op(RRaw a, RRaw b, ASTNode ast) {
int na = a.size();
int nb = b.size();
int[] dimensions = Arithmetic.resultDimensions(ast, a, b);
Names names = Arithmetic.resultNames(ast, a, b);
if (na == 0 || nb == 0) {
return RRaw.EMPTY;
}
int n = (na > nb) ? na : nb;
byte[] content = new byte[n];
int ai = 0;
int bi = 0;
for (int i = 0; i < n; i++) {
byte araw = a.getRaw(ai++);
if (ai == na) {
ai = 0;
}
byte braw = b.getRaw(bi++);
if (bi == nb) {
bi = 0;
}
content[i] = op(araw, braw);
}
if (ai != 0 || bi != 0) {
RContext.warning(ast, RError.LENGTH_NOT_MULTI);
}
return RRaw.RRawFactory.getFor(content, dimensions, names);
}
public RLogical op(RLogical a, RLogical b, ASTNode ast) {
int na = a.size();
int nb = b.size();
int[] dimensions = Arithmetic.resultDimensions(ast, a, b);
Names names = Arithmetic.resultNames(ast, a, b);
if (na == 0 || nb == 0) {
return RLogical.EMPTY;
}
int n = (na > nb) ? na : nb;
int[] content = new int[n];
int ai = 0;
int bi = 0;
for (int i = 0; i < n; i++) {
int alog = a.getLogical(ai++);
if (ai == na) {
ai = 0;
}
int blog = b.getLogical(bi++);
if (bi == nb) {
bi = 0;
}
content[i] = op(alog, blog);
}
if (ai != 0 || bi != 0) {
RContext.warning(ast, RError.LENGTH_NOT_MULTI);
}
return RLogical.RLogicalFactory.getFor(content, dimensions, names);
}
/**
* Returns the modified Bessel function of order 0 of the argument.
*
* <p>The function is defined as <tt>i0(x) = j0( ix )</tt>.
*
* <p>The range is partitioned into the two intervals [0,8] and (8, infinity). Chebyshev
* polynomial expansions are employed in each interval.
*
* @param x the value to compute the bessel function of.
*/
public static double i0(double x) throws ArithmeticException {
double y;
if (x < 0) x = -x;
if (x <= 8.0) {
y = (x / 2.0) - 2.0;
return (Math.exp(x) * Arithmetic.chbevl(y, A_i0, 30));
}
return (Math.exp(x) * Arithmetic.chbevl(32.0 / x - 2.0, B_i0, 25) / Math.sqrt(x));
}
/**
* Returns the exponentially scaled modified Bessel function of the third kind of order 1 of the
* argument.
*
* <p><tt>k1e(x) = exp(x) * k1(x)</tt>.
*
* @param x the value to compute the bessel function of.
*/
public static double k1e(double x) throws ArithmeticException {
double y;
if (x <= 0.0) throw new ArithmeticException();
if (x <= 2.0) {
y = x * x - 2.0;
y = Math.log(0.5 * x) * i1(x) + Arithmetic.chbevl(y, A_k1, 11) / x;
return (y * Math.exp(x));
}
return (Arithmetic.chbevl(8.0 / x - 2.0, B_k1, 25) / Math.sqrt(x));
}
/**
* Returns the exponentially scaled modified Bessel function of the third kind of order 0 of the
* argument.
*
* @param x the value to compute the bessel function of.
*/
public static double k0e(double x) throws ArithmeticException {
double y;
if (x <= 0.0) throw new ArithmeticException();
if (x <= 2.0) {
y = x * x - 2.0;
y = Arithmetic.chbevl(y, A_k0, 10) - Math.log(0.5 * x) * i0(x);
return (y * Math.exp(x));
}
y = Arithmetic.chbevl(8.0 / x - 2.0, B_k0, 25) / Math.sqrt(x);
return (y);
}
/**
* Returns the exponentially scaled modified Bessel function of order 1 of the argument.
*
* <p>The function is defined as <tt>i1(x) = -i exp(-|x|) j1( ix )</tt>.
*
* @param x the value to compute the bessel function of.
*/
public static double i1e(double x) throws ArithmeticException {
double y, z;
z = Math.abs(x);
if (z <= 8.0) {
y = (z / 2.0) - 2.0;
z = Arithmetic.chbevl(y, A_i1, 29) * z;
} else {
z = Arithmetic.chbevl(32.0 / z - 2.0, B_i1, 25) / Math.sqrt(z);
}
if (x < 0.0) z = -z;
return (z);
}
@Test
public void addTest() {
Assert.assertEquals(20, a.addition(10, 10), "sum is not equal");
}
