Separate values into bands

Hi. Please, I need a help with the following.

I have a set of very larg number of values (8000 values), they are in a separet file I uploaded the file using "load" but now I need to divide these values into bands starting from the minimum value each band will cover 1.5.

so the first band will have to cover all the values included between the minimum value and minimum value+1.5 ecc..

how can I do it?

thank you.