Split strings inside an array cell of strings

Hello, I have a cell array of strings that looks like this:

Rotation = {'PR=60.81' '-0.29' '-53.09#'};

I'm having problems trying to extract the numbers only from inside the Rotation array. I've tried doing multiple things, with strsplit(Rotation(1), '=') I get an error saying the First input must be a string. I'm sure it's something very simple but I have been trying all day and seems I'm missing something.

Your help would be really appreciated :)

Mo

[Cedric]

Do you have only one row in this cell array or multiple ones with similar structure? And where does the cell array come from? It is easy to process the 3 elements that you gave here, but I suspect that it would be even easier to re-design a bit the code that generate this cell array, for it to output directly the numbers.