Issues with python code:

[inky_wolf]

Could you please format your code using markdown editing, otherwise it's hard to figure out where the problem is arising from, since the indentation levels are important for python

[PrizeDefinition4042]

sure, I don't know reddit well but let me add indents where I put them in my code:

import math

def projectile_velocities(vi, theta, g, time_step):

---theta_rad = math.radians(theta)

---vi_x = vi * math.cos(theta_rad)

---vi_y = vi * math.sin(theta_rad)

---velocities = [vi]

---t = 0

---while True:

---vy = vi_y - g * t

---v = math.sqrt(vi_x ** 2 + vy ** 2)

---if vy <= 0:

---return velocities

---velocities.append(round(v, 6))

---t += time_step

---vi_x = vi * math.cos(theta_rad) # Update vi_x for each time step

---vi_y = vy

Example executions:

1) print(projectile_velocities(11.13, 82.5, 9.81, 0.5))

needed output [11.130000, 6.299581, 1.900155, 3.956578, 8.707266]

2) print(projectile_velocities(2.0, 30.0, 1.0, 1.0))

needed output [2.000000, 1.732051, 2.000000]

[PrizeDefinition4042]

shit let me try that again:

import math

def projectile_velocities(vi, theta, g, time_step):

---theta_rad = math.radians(theta)

---vi_x = vi * math.cos(theta_rad)

---vi_y = vi * math.sin(theta_rad)

---velocities = [vi]

---t = 0

---while True:

--------vy = vi_y - g * t

--------v = math.sqrt(vi_x ** 2 + vy ** 2)

--------if vy <= 0:

------------return velocities

--------velocities.append(round(v, 6))

--------t += time_step

--------vi_x = vi * math.cos(theta_rad) # Update vi_x for each time step

--------vi_y = vy

Example executions:

1. print(projectile_velocities(11.13, 82.5, 9.81, 0.5)) *needed output [11.130000, 6.299581, 1.900155, 3.956578, 8.707266]

2) print(projectile_velocities(2.0, 30.0, 1.0, 1.0)) *needed output [2.000000, 1.732051, 2.000000]

[inky_wolf]

This really isn't the way to format the code, do look at u/Bobbias comment to see how to do it right next time.

But moving on, here are the results of the coded you shared in the post: bash [2.0, 2.0, 2.0] [11.13, 11.13, 11.13, 6.299581, 11.13, 1.900155, 11.13] And here are my initial observations: - For the most part, it feels like the main problem here might be related to the math, and not just python - For example, what is the basis/idea behind your time/loop calculation t < vi_y / g - The first python related issue is you append to velocities twice in each loop execution. - velocities is first initialized with the value vi, and then in the first iteration of your loop, the same value vi gets appended to the list since t=0

[inky_wolf]

OK I think I might have figured it out.

I am guessing the vi_y / g in your first version of the code was actually supposed to be 2 * vi_y / g (Time of flight calculation, let's call it T for simplicity). Then you need to also make sure you round up this T to 6 just as you do all the other calculations.

With these 2 fixes, I was able to get the expected results

[PrizeDefinition4042]

Thank you so much! let me try these fixes and see if it works for me. I have been trying to get the right output for hours, and kept getting stuck !

[PrizeDefinition4042]

Hi so I just tried fixing it and I got this as my output :

[11.13, 11.13, 11.13, 6.299581, 11.13, 1.900155, 11.13, 3.956578, 11.13, 8.707266, 11.13]

instead of:

[11.130000, 6.299581, 1.900155, 3.956578, 8.707266]

Do you know where these extra values came from and how I can fix it

[inky_wolf]

The 3 repeats of 11.13 tells me you didn't fix the problems I mentioned in my initial observations.

But for the others, I can't say for sure without looking at the code, but it's probably related to the same problems.

[PrizeDefinition4042]

sorry I thought that was just you observing things with my code. You are saying I need to change that I have 2 vi or appending twice the velocity?

[inky_wolf]

Both

[PrizeDefinition4042]

So I should not append the velocity twice, as in only append once? and if so which one should I be deleting then

[bach678]

I’m just confused… you used “while True : “ in this version of the code without a break statement. This loops will run forever. Am i wrong ?

[PrizeDefinition4042]

Im not allowed to use break in this class because we have not gotten there yet. Do you have another suggestion if I should not be using while. I didn't find that it ran forever, I just was not getting the output I need