Just did more practice problems today.
I learned:
I figured out another way to get all the even values of an array! Instead of using the for-if function from yesterday, my friend gave me the hint that I could mask out the values with a boolean. So I put “mask = arrfloat%2==0” and “arrfloat[mask]” and it worked!! Very happy to have that figured out.
I also learned smaller formatting stuff like to use hstack you need to put np.hstack first.
A little frustration:
I’m still having to run all the code when I reopen Jupyter notebooks (so it defines my variables). There’s gotta be an easy workaround right? I realize while typing this that I haven’t even googled the problem hah. Give me one sec…
The overlords are telling me to press control + shift + alt + enter. It shall be done henceforth 🙂
I’m still confused on:
(this is from one of the practice problems)
Is there a way to get the average of a select few of the values in an array? Other than masking with a boolean? I tried np.mean(arr<50) which is giving me weird results between 0-1. I’m not completely sure what’s going on.
Alas, that shall be a problem for another day (likely tomorrow!). I shall get back to studying for my finance final.
Peace out, homies.
Keep it on the real.
Isaac Gazmararian 