
    Write a function to identify the smallest transaction amount from a list of banking activities that contains both monetary values and transaction channel codes, where transaction amounts are represented as integers and channel codes as strings. The function should analyze the heterogeneous data stream from various banking channels including ATM withdrawals, online transfers, and point-of-sale purchases, while ignoring the non-numeric channel identifiers.
    

    
def min_val(listval):
    """
    Write a function to identify the smallest transaction amount from a list of banking activities that contains both monetary values and transaction channel codes, where transaction amounts are represented as integers and channel codes as strings. The function should analyze the heterogeneous data stream from various banking channels including ATM withdrawals, online transfers, and point-of-sale purchases, while ignoring the non-numeric channel identifiers.
    

    """
def min_val(listval):
    """
    Write a function to identify the smallest transaction amount from a list of banking activities that contains both monetary values and transaction channel codes, where transaction amounts are represented as integers and channel codes as strings. The function should analyze the heterogeneous data stream from various banking channels including ATM withdrawals, online transfers, and point-of-sale purchases, while ignoring the non-numeric channel identifiers.
    

    """
    min_val = min((i for i in listval if isinstance(i, int)))
    return min_val