@Override Val apply(Env env, Env.StackHelp stk, AST asts[]) { // Compute the variable args. Find the common row count Val vals[] = new Val[asts.length]; Vec vec = null; for (int i = 1; i < asts.length; i++) { vals[i] = stk.track(asts[i].exec(env)); if (vals[i].isFrame()) { Vec anyvec = vals[i].getFrame().anyVec(); if (anyvec == null) continue; // Ignore the empty frame if (vec == null) vec = anyvec; else if (vec.length() != anyvec.length()) throw new IllegalArgumentException( "cbind frames must have all the same rows, found " + vec.length() + " and " + anyvec.length() + " rows."); } } boolean clean = false; if (vec == null) { vec = Vec.makeZero(1); clean = true; } // Default to length 1 // Populate the new Frame Frame fr = new Frame(); for (int i = 1; i < asts.length; i++) { switch (vals[i].type()) { case Val.FRM: fr.add(fr.makeCompatible(vals[i].getFrame())); break; case Val.FUN: throw H2O.unimpl(); case Val.STR: throw H2O.unimpl(); case Val.NUM: // Auto-expand scalars to fill every row double d = vals[i].getNum(); fr.add(Double.toString(d), vec.makeCon(d)); break; default: throw H2O.unimpl(); } } if (clean) vec.remove(); return new ValFrame(fr); }