Coding Math: Episode 47 - Weighted Random

Weighted random functions allow you to randomly choose between multiple options, while specifying the exact odds of getting any one option.

[jamjam]

thanks a million. I was solving a leetcode question on weighted probabilty. Your video helped a ton

[freshtauwaka]

You should get way more views!
Your videos are so cleanly made.

Anyway, excited for that fractal video :D

[letsgettomillwithoutvids]

Very clear easier to understand now I understand how weighted random works and was trying to figure it out thank you still getting my head around the for loop you softcoded it to subtract the chance value

[puppyguard]

The exact thing I wanted, with the best explanation and a perfect showcase. Thank you.

[rib_rob_personal]

I hope to implement this idea to generate random behaviors that change over time. This is exactly what I needed!

[taylozen]

im working with a different language but this helped me so much ^^ you explained everything very well while keeping my attention, even with my adhd lol

[richardosborn]

thank you! I'm a Unity developer, and I followed this pretty well.

[kamoroso]

I used this weighted random algorithm to generate random mates based on their fitness values for a genetic algorithm.

[AngeofDrkness]

Thank you for this. I can't believe this never crossed my mind for how to do this

[syeddaniyalhaidernaqvi]

Was stuck on how to implement a weighted enemy spawn in my game.. this cleared all the doubts... Thankyou sir! Love from Pakistan ❤❤❤

[AfterthoughtTV]

Please keep making these! You've changed my coding career!

[_laryssa]

Very very useful video, thank you for providing

[harrygray]

Ok, i am like 1 minute in and I have to admit. I did not expect this to be in Javascript at all.
You're exactly what i'm looking for, sir. Thank you.

[ephemeraldgames]

This weighs in favor of the earlier results you check though, such as if nothing has a 25% chance and a gold piece has a 20% chance, only 75% of the time the gold piece has a chance to be picked, meaning its actual percentage is 15% (20%*75%)? Or am i mathing wrong?

If you randomize the order of prizes every time, though, then that should correct for this.

[susi]

{ banana, 3 },
{ apple, 1},
{ pineapple, 5}

if the array contains the items blow in the order, the first element is banana which means if the random number is less than 3, banana will get picked every time.
if the number is grater than 1, the result is acceptable. However, If the random number is less than 1, we expect the item to be apple. unfortunately, the result will be banana since we loop through from the first index of the array which is banana.

before call the function sorting process should get done in advance in order to get the expected results.

[rishitchakraborty]

This was so good thanks, but I was wondering, what if I want the percentage to be exact, like the demon should appear exactly 10 times out of 100?

[zjelco]

That was so nice, very usable. Keep up the good work!

[SintaxErorr]

I used this to create randomized loot tables. thank you so much..

[umppo]

Thank you for that man! It was really helpful

[a-k]

One question are the computerised roulette machines fixed, or can they be fixed in a negative or positive way.?