Examples with ISparseArray org.matheclipse.core.interfaces.ISparseArray used on opensource projects

Example 6 with ISparseArray

use of org.matheclipse.core.interfaces.ISparseArray in project symja_android_library by axkr.

the class Convert method list2Vector.

/**
 * Returns a FieldVector if possible.
 *
 * @param expr
 * @return <code>null</code> if the conversion isn't possible.
 * @throws ClassCastException
 */
public static FieldVector<IExpr> list2Vector(final IExpr expr) throws ClassCastException {
    if (expr == null) {
        return null;
    }
    int dim = expr.isVector();
    if (dim <= 0) {
        return null;
    }
    if (expr.isSparseArray()) {
        ISparseArray array = (ISparseArray) expr;
        return array.toFieldVector(false);
    }
    if (expr.isList()) {
        final int rowSize = expr.argSize();
        IAST list = (IAST) expr;
        final IExpr[] elements = new IExpr[rowSize];
        for (int i = 0; i < rowSize; i++) {
            elements[i] = list.get(i + 1);
        }
        return new ArrayFieldVector<IExpr>(elements, false);
    }
    return null;
}