is there a built in function to get minimum nr of bits for an integer ?

I have found the formula for minimum nr of bits for a integer

bspec = floor(log2(16)) + 1

Is there a built in function for this in MATLAB ?

[dpb]

When you write one, there will be... :)

But, what do you need a function for a constant; unless you intended the argument '16' to be a variable based on the length of a word???

If the object is to find out the size of an integer, see

doc class
doc isa

Answer 1

[Peng Liu]

Not floor(log2(x)) + 1 but ceil(log2(x)) is correct

[dpb]

Good catch; but I still wonder what OP actually wants... :)