public static RDouble expandXVector(DoubleImpl xarg, int xsize, int count) {
int nsize = xsize * count;
double[] x = xarg.getContent();
double[] res = new double[nsize];
int offset = 0;
for (int rep = 0; rep < count; rep++) {
System.arraycopy(x, 0, res, offset, xsize);
offset += xsize;
}
return RDouble.RDoubleFactory.getFor(res);
}
public static RDouble expandYVector(DoubleImpl yarg, int ysize, int count) {
int size = ysize;
int nsize = size * count;
double[] y = yarg.getContent();
double[] res = new double[nsize];
int offset = 0;
for (int elem = 0; elem < size; elem++) {
double v = y[elem];
Arrays.fill(res, offset, offset + count, v);
offset += count;
}
return RDouble.RDoubleFactory.getFor(res);
}
@Override public RNode create(ASTNode call, RSymbol[] names, RNode[] exprs) {
final ArgumentInfo ia = check(call, names, exprs);
final int posText = ia.position("text");
final int posLast = ia.position("last");
final int posFirst = ia.position("first");
final RDouble defaultLast = RDouble.RDoubleFactory.getScalar(1000000); // FIXME slow, but perhaps the default is not used, anyway
return new Builtin(call, names, exprs) {
@Override public RAny doBuiltIn(Frame frame, RAny[] args) {
RString text = args[posText].asString();
warn.naIntroduced = false;
RDouble first = args[posFirst].asDouble(warn);
RDouble last;
last = posLast != -1 ? args[posLast].asDouble(warn) : defaultLast;
RString res = substring(text, first, last, ast);
if (warn.naIntroduced) {
RContext.warning(ast, RError.NA_INTRODUCED_COERCION);
}
return res;
}
};
}