Normalization of a number in Scratch

Kami-ko

QUICK TIP:

I don't know if anyone has mentioned this already, but there's a pretty simple way of getting the normalized value (scales value to -1, 0, or 1) of a number in Scratch. Simply use

and … that's it!

SimpleScratch

Doesn't work if number = 0

Kami-ko

It's not that advanced, but I wanted to let you guys know; hopefully this can help one of you

Kami-ko

SimpleScratch wrote:
Doesn't work if number = 0

0 would equal 0

badatprogrammingibe

That's an implementation of signum, not an implementation of normalisation. Even so, SimpleScratch is right in that it doesn't work with 0.

Sheep_maker

should work with n = 0. It has a range of (-1, 1)

XayCraft360

Sheep_maker wrote:
should work with n = 0. It has a range of (-1, 1)

if you think about it, it wouldn't work with numbers greater than 0. For example, 2 would give 2/3

Kami-ko

badatprogrammingibe wrote:
That's an implementation of signum, not an implementation of normalisation. Even so, SimpleScratch is right in that it doesn't work with 0.

That's right haha, got my terms mixed up.

Monna-Uka

How about:

Monna-Uka

Monna-Uka wrote:

How about:

--Explosion--

Frankly, this seems sorta obvious…

1132262

XayCraft360 wrote:
Sheep_maker wrote:
should work with n = 0. It has a range of (-1, 1)
if you think about it, it wouldn't work with numbers greater than 0. For example, 2 would give 2/3

Easy.

Last edited by 1132262 (March 4, 2020 23:57:44)

1132262

--Explosion-- wrote:
Frankly, this seems sorta obvious…

You underestimate the time we spend trying to get all of our code to fit into one expression.

--Explosion--

SimpleScratch wrote:
Doesn't work if number = 0

It should, 0/0 is 1.

1132262

--Explosion-- wrote:
SimpleScratch wrote:
Doesn't work if number = 0
It should, 0/0 is 1.

No…

Monna-Uka

--Explosion-- wrote:
SimpleScratch wrote:
Doesn't work if number = 0
It should, 0/0 is 1.

x/0 in Scratch is equal to infinity. I know it because I have used this to pause the playing music.

NickyNouse

Yeah, Scratch (both 2 and 3) use a number standard called IEEE 754, which defines 1/0 as the special value Infinity and -1/0 as -Infinity.

Maximouse

--Explosion-- wrote:
SimpleScratch wrote:
Doesn't work if number = 0
It should, 0/0 is 1.

0/0 is undefined (NaN in Scratch). 1/0 is infinity.

Discuss Scratch