Examples with Selection tech.tablesaw.selection.Selection used on opensource projects

Example 41 with Selection

use of tech.tablesaw.selection.Selection in project symja_android_library by axkr.

the class Table method dropWhere.

public Table dropWhere(Selection selection) {
    Selection opposite = new BitmapBackedSelection();
    opposite.addRange(0, rowCount());
    opposite.andNot(selection);
    Table newTable = this.emptyCopy(opposite.size());
    Rows.copyRowsToTable(opposite, this, newTable);
    return newTable;
}

Example 42 with Selection

use of tech.tablesaw.selection.Selection in project symja_android_library by axkr.

the class Table method dropRows.

public Table dropRows(int... rowNumbers) {
    Preconditions.checkArgument(Ints.max(rowNumbers) <= rowCount());
    Selection selection = Selection.withRange(0, rowCount()).andNot(Selection.with(rowNumbers));
    return where(selection);
}

Example 43 with Selection

use of tech.tablesaw.selection.Selection in project symja_android_library by axkr.

the class Table method sampleSplit.

/**
 * Splits the table into two, randomly assigning records to each according to the proportion given
 * in trainingProportion
 *
 * @param table1Proportion The proportion to go in the first table
 * @return An array two tables, with the first table having the proportion specified in the method
 *     parameter, and the second table having the balance of the rows
 */
public Table[] sampleSplit(double table1Proportion) {
    Table[] tables = new Table[2];
    int table1Count = (int) Math.round(rowCount() * table1Proportion);
    Selection table2Selection = new BitmapBackedSelection();
    for (int i = 0; i < rowCount(); i++) {
        table2Selection.add(i);
    }
    Selection table1Selection = new BitmapBackedSelection();
    Selection table1Records = selectNRowsAtRandom(table1Count, rowCount());
    for (int table1Record : table1Records) {
        table1Selection.add(table1Record);
    }
    table2Selection.andNot(table1Selection);
    tables[0] = where(table1Selection);
    tables[1] = where(table2Selection);
    return tables;
}

Example 44 with Selection

use of tech.tablesaw.selection.Selection in project symja_android_library by axkr.

the class Table method dropRowsWithMissingValues.

/**
 * Returns only those records in this table that have no columns with missing values
 */
public Table dropRowsWithMissingValues() {
    Selection missing = new BitmapBackedSelection();
    for (int row = 0; row < rowCount(); row++) {
        for (int col = 0; col < columnCount(); col++) {
            Column<?> c = column(col);
            if (c.isMissing(row)) {
                missing.add(row);
                break;
            }
        }
    }
    Selection notMissing = Selection.withRange(0, rowCount());
    notMissing.andNot(missing);
    Table temp = emptyCopy(notMissing.size());
    Rows.copyRowsToTable(notMissing, this, temp);
    return temp;
}

Example 45 with Selection

use of tech.tablesaw.selection.Selection in project symja_android_library by axkr.

the class ExprColumn method isIn.

public Selection isIn(Collection<IExpr> strings) {
    Set<IExpr> stringSet = Sets.newHashSet(strings);
    Selection results = new BitmapBackedSelection();
    for (int i = 0; i < size(); i++) {
        if (stringSet.contains(values.get(i))) {
            results.add(i);
        }
    }
    return results;
}