How to do it...

To complete this recipe, do the following:

1. Create the following measure:

ShannonEntropy = 
    SUMX(
        ADDCOLUMNS(
            SUMMARIZE(
                'R01_Table',
                'R01_Table'[Value],
                "Probability",
                DIVIDE(
                    COUNTROWS('R01_Table'),
                    COUNTROWS(ALL('R01_Table'))
                )
            ),
            "H(X)",
            -1 * [Probability] * LOG([Probability],2)
        ),
        [H(X)]
    )

2. On a Report page, create a Card visualization and place the ShannonEntropy measure into the Fields area.