Examples with ValFrame water.rapids.vals.ValFrame used on opensource projects

Example 51 with ValFrame

use of water.rapids.vals.ValFrame in project h2o-3 by h2oai.

the class AstAssign method apply.

@Override
public ValFrame apply(Env env, Env.StackHelp stk, AstRoot[] asts) {
    Key<Frame> id = Key.make(asts[1].str());
    Frame src = stk.track(asts[2].exec(env)).getFrame();
    // New global Frame over shared Vecs
    return new ValFrame(env._ses.assign(id, src));
}

Example 52 with ValFrame

use of water.rapids.vals.ValFrame in project h2o-3 by h2oai.

the class AstRectangleAssign method apply.

@Override
public ValFrame apply(Env env, Env.StackHelp stk, AstRoot[] asts) {
    Frame dst = stk.track(asts[1].exec(env)).getFrame();
    Val vsrc = stk.track(asts[2].exec(env));
    AstParameter col_list = (AstParameter) asts[3];
    // Column selection
    AstNumList cols_numlist = new AstNumList(col_list.columns(dst.names()));
    // Special for AstAssign: "empty" really means "all"
    if (cols_numlist.isEmpty())
        cols_numlist = new AstNumList(0, dst.numCols());
    // Allow R-like number list expansion: negative column numbers mean exclusion
    int[] cols = AstColSlice.col_select(dst.names(), cols_numlist);
    // Any COW optimized path changes Vecs in dst._vecs, and so needs a
    // defensive copy.  Any update-in-place path updates Chunks instead of
    // dst._vecs, and does not need a defensive copy.  To make life easier,
    // just make the copy now.
    dst = new Frame(dst._names, dst.vecs().clone());
    // Assign over the column slice
    if (asts[4] instanceof AstNum || asts[4] instanceof AstNumList) {
        // Explictly named row assignment
        AstNumList rows = (asts[4] instanceof AstNum) ? new AstNumList(((AstNum) asts[4]).getNum()) : ((AstNumList) asts[4]);
        // Empty rows is really: all rows
        if (rows.isEmpty())
            rows = new AstNumList(0, dst.numRows());
        switch(vsrc.type()) {
            case Val.NUM:
                assign_frame_scalar(dst, cols, rows, nanToNull(vsrc.getNum()), env._ses);
                break;
            case Val.STR:
                assign_frame_scalar(dst, cols, rows, vsrc.getStr(), env._ses);
                break;
            case Val.FRM:
                assign_frame_frame(dst, cols, rows, vsrc.getFrame(), env._ses);
                break;
            default:
                throw new IllegalArgumentException("Source must be a Frame or Number, but found a " + vsrc.getClass());
        }
    } else {
        // Boolean assignment selection?
        Frame rows = stk.track(asts[4].exec(env)).getFrame();
        switch(vsrc.type()) {
            case Val.NUM:
                assign_frame_scalar(dst, cols, rows, nanToNull(vsrc.getNum()), env._ses);
                break;
            case Val.STR:
                assign_frame_scalar(dst, cols, rows, vsrc.getStr(), env._ses);
                break;
            case Val.FRM:
                throw H2O.unimpl();
            default:
                throw new IllegalArgumentException("Source must be a Frame or Number, but found a " + vsrc.getClass());
        }
    }
    return new ValFrame(dst);
}

Example 53 with ValFrame

use of water.rapids.vals.ValFrame in project h2o-3 by h2oai.

the class AstUniOp method exec.

@Override
public Val exec(Val... args) {
    Val val = args[1];
    switch(val.type()) {
        case Val.NUM:
            return new ValNum(op(val.getNum()));
        case Val.FRM:
            Frame fr = val.getFrame();
            for (int i = 0; i < fr.numCols(); i++) if (!fr.vec(i).isNumeric())
                throw new IllegalArgumentException("Operator " + str() + "() cannot be applied to non-numeric column " + fr.name(i));
            // Get length of columns in fr and append `op(colName)`. For example, a column named "income" that had
            // a log transformation would now be changed to `log(income)`.
            String[] newNames = new String[fr.numCols()];
            for (int i = 0; i < newNames.length; i++) {
                newNames[i] = str() + "(" + fr.name(i) + ")";
            }
            return new ValFrame(new MRTask() {

                @Override
                public void map(Chunk[] cs, NewChunk[] ncs) {
                    for (int col = 0; col < cs.length; col++) {
                        Chunk c = cs[col];
                        NewChunk nc = ncs[col];
                        for (int i = 0; i < c._len; i++) nc.addNum(op(c.atd(i)));
                    }
                }
            }.doAll(fr.numCols(), Vec.T_NUM, fr).outputFrame(newNames, null));
        case Val.ROW:
            double[] ds = new double[val.getRow().length];
            for (int i = 0; i < ds.length; ++i) ds[i] = op(val.getRow()[i]);
            String[] names = ((ValRow) val).getNames().clone();
            return new ValRow(ds, names);
        default:
            throw H2O.unimpl("unop unimpl: " + val.getClass());
    }
}

Example 54 with ValFrame

use of water.rapids.vals.ValFrame in project h2o-3 by h2oai.

the class AstHist method apply.

@Override
public ValFrame apply(Env env, Env.StackHelp stk, AstRoot[] asts) {
    // stack is [ ..., ary, breaks]
    // handle the breaks
    Frame fr2;
    Frame f = stk.track(asts[1].exec(env)).getFrame();
    if (f.numCols() != 1)
        throw new IllegalArgumentException("Hist only applies to single numeric columns.");
    Vec vec = f.anyVec();
    if (!vec.isNumeric())
        throw new IllegalArgumentException("Hist only applies to single numeric columns.");
    //TODO Add case when vec is a constant numeric
    if (vec.isConst())
        throw new IllegalArgumentException("Hist does not apply to constant numeric columns.");
    AstRoot a = asts[2];
    String algo = null;
    int numBreaks = -1;
    double[] breaks = null;
    if (a instanceof AstStr)
        algo = a.str().toLowerCase();
    else if (a instanceof AstNumList)
        breaks = ((AstNumList) a).expand();
    else if (a instanceof AstNum)
        numBreaks = (int) a.exec(env).getNum();
    AstHist.HistTask t;
    double h;
    double x1 = vec.max();
    double x0 = vec.min();
    if (breaks != null)
        t = new AstHist.HistTask(breaks, -1, -1).doAll(vec);
    else if (algo != null) {
        switch(algo) {
            case "sturges":
                numBreaks = sturges(vec);
                h = (x1 - x0) / numBreaks;
                break;
            case "rice":
                numBreaks = rice(vec);
                h = (x1 - x0) / numBreaks;
                break;
            case "sqrt":
                numBreaks = sqrt(vec);
                h = (x1 - x0) / numBreaks;
                break;
            case "doane":
                numBreaks = doane(vec);
                h = (x1 - x0) / numBreaks;
                break;
            case "scott":
                h = scotts_h(vec);
                numBreaks = scott(vec, h);
                // special bin width computation
                break;
            case "fd":
                h = fds_h(vec);
                numBreaks = fd(vec, h);
                // special bin width computation
                break;
            default:
                numBreaks = sturges(vec);
                // just do sturges even if junk passed in
                h = (x1 - x0) / numBreaks;
        }
        t = new AstHist.HistTask(computeCuts(vec, numBreaks), h, x0).doAll(vec);
    } else {
        h = (x1 - x0) / numBreaks;
        t = new AstHist.HistTask(computeCuts(vec, numBreaks), h, x0).doAll(vec);
    }
    // wanna make a new frame here [breaks,counts,mids]
    final double[] brks = t._breaks;
    final long[] cnts = t._counts;
    final double[] mids_true = t._mids;
    final double[] mids = new double[t._breaks.length - 1];
    for (int i = 1; i < brks.length; ++i) mids[i - 1] = .5 * (t._breaks[i - 1] + t._breaks[i]);
    Vec layoutVec = Vec.makeZero(brks.length);
    fr2 = new MRTask() {

        @Override
        public void map(Chunk[] c, NewChunk[] nc) {
            int start = (int) c[0].start();
            for (int i = 0; i < c[0]._len; ++i) {
                nc[0].addNum(brks[i + start]);
                if (i == 0) {
                    nc[1].addNA();
                    nc[2].addNA();
                    nc[3].addNA();
                } else {
                    nc[1].addNum(cnts[(i - 1) + start]);
                    nc[2].addNum(mids_true[(i - 1) + start]);
                    nc[3].addNum(mids[(i - 1) + start]);
                }
            }
        }
    }.doAll(4, Vec.T_NUM, new Frame(layoutVec)).outputFrame(null, new String[] { "breaks", "counts", "mids_true", "mids" }, null);
    layoutVec.remove();
    return new ValFrame(fr2);
}

Example 55 with ValFrame

use of water.rapids.vals.ValFrame in project h2o-3 by h2oai.

the class AstModuloKFold method apply.

@Override
public ValFrame apply(Env env, Env.StackHelp stk, AstRoot[] asts) {
    Vec foldVec = stk.track(asts[1].exec(env)).getFrame().anyVec().makeZero();
    int nfolds = (int) asts[2].exec(env).getNum();
    return new ValFrame(new Frame(AstKFold.moduloKfoldColumn(foldVec, nfolds)));
}