VECTOR_DELETE

The VECTOR_DELETE node returns a new Vector with elements deleted from requested indices Inputs ------ v : Vector The input vector to delete from Params: indices : Array specified indices to delete value(s) at from the input vector length : int number of elements to delete from the input vector, default is 1 (this only applies when one index is specified for indices parameter) Returns: out : Vector The new vector with element(s) deleted from the input vector

Python Code

from numpy import any, array, delete, arange
from flojoy import flojoy, Vector, Array


@flojoy
def VECTOR_DELETE(default: Vector, indices: Array, length: int = 1) -> Vector:
    """The VECTOR_DELETE node returns a new Vector with elements deleted from requested indices

    Inputs
    ------
    v : Vector
        The input vector to delete from

    Parameters
    ----------
    indices: Array
        specified indices to delete value(s) at from the input vector

    length: int
        number of elements to delete from the input vector, default is 1 (this only applies when one index is specified for indices parameter)

    Returns
    -------
    Vector
        The new vector with element(s) deleted from the input vector
    """

    # unwrap the indices first
    indices = array(indices.unwrap(), dtype=int)

    assert len(default.v) > len(
        indices
    ), "The length of indices parameter must be less than the length of the Vector."
    assert any(indices >= 0), "The indices must be greater than zero."

    if len(indices) == 1:
        assert (
            (indices[0] + (length - 1)) < len(default.v)
        ), "The length of items to delete starting from index parameter must not exceed the length of the Vector."

    if len(indices) > 1:
        v = delete(default.v, indices, None)
    else:
        indices = arange(indices[0], length)
        v = delete(default.v, indices, None)
    return Vector(v=v)

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Example

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Press enter or space to select a node.You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.

Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.

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In this example, we generate a vector by using a LINSPACE node. Then starting from index 0, 2 elements are deleted using VECTOR_DELETE. The resulting vector is visualized with SCATTER node, and another node has been connected to LINSPACE for comparison.