I made a Manipulate box that is working very well, using lots of random numbers. I would like to add a button to "reset" (i.e. to change, randomize, or reselect) *all the random parameters*.

Here's the code I added to the Manipulate box, but it doesn't work :

```
Row[{Spacer[200],
    Button[
        "Randomize all parameters",
        Clear["alpha", "Phase", "Amplitude", "Frequency"],
        Appearance -> "Palette",
        ImageSize -> {150, 28}
    ]
}],

```

What should I use instead of `Clear["alpha", "Phase", "Amplitude", "Frequency"]` to ***randomize*** all these parameters, according to their definitions ?

**EDIT :** Here's a complete MWE showing the problem :

```
Clear["Global`*"]

Amplitude[k_] := Amplitude[k] = RandomReal[{0.5, 1.5}]
Frequency[k_] := Frequency[k] = RandomReal[{1, 5}]
Phase[k_] := Phase[k] = RandomReal[{0, 2Pi}]

Manipulate[
    Plot[
        Sum[Amplitude[k]Sin[2Pi Frequency[k]t + Phase[k]],
        {k, 1, Nwaves}
        ],
    {t, 0, 1},
    Frame -> True, 
    PlotRange -> {{0, 1}, {-5, 5}},
    PerformanceGoal -> "Quality",
    ImageSize -> 600
    ],
    {{Nwaves, 1, Style["Number of waves", 10]}, 1, 20, 1, Appearance -> "Labeled"},
    Delimiter,
    Row[{
        Button[
            "Reset random parameters",
            {(* Reset command for "Amplitude", "Frequency", "Phase" *)},
            Appearance -> "Palette",
            ImageSize -> {250, 28}
        ]
    }],
    ControlPlacement -> Bottom
]

```

**EDIT 2 :** The "duplicate" referenced above doesn't apply to this question, since the answers are specific to that question. I don't see how to apply them to the question here.