Is there a way to put the output of a function into an array in python while using a loop?

Question

When I cycle through, the issue is that it takes the first value only and does not apply the second and third values. I want this to cycle 20 times to get a better understanding of what's going on. I have looked at W3 schools and other resources and I don't know where I am running into an issue

#Creating a loop to run through 

import pandas as pd
import numpy as np
import seaborn as sns
import matplotlib.pyplot as plt

a1_0 = Three_Time     #Array 1 initial value
a2_0 = Two_Time     #Array 2 initial value
i = 0
time = [0]
Hour_cap = 20
array1 = np.array([a1_0]* i)
array2 = np.array([a2_0] * i )

while i < Hour_cap:
    i += 1
    time = np.append(time, i)
    array1 = np.append(array1, array1[i]) 
    array2 = np.append(array2, array2[i])

Expected Output: array1[0,192,384....]

It would help us understand what was going on if your code were correctly indented. It's hard to know what's inside the while loop. — Frank Yellin
– Frank Yellin, Commented Dec 30, 2020 at 17:32
Please include your import statements as well, so its easier to decode. — DapperDuck
– DapperDuck, Commented Dec 30, 2020 at 17:33
Could you please share output of the script as well as your expected output, to better understand the issue. — Hanumanth Reddy Aredla
– Hanumanth Reddy Aredla, Commented Dec 30, 2020 at 17:36
@Spencer You should use empty lists, append to them and only then convert them to numpy arrays. np.append is going to take much more time. — Guimoute
– Guimoute, Commented Dec 30, 2020 at 17:41

Yehonatan harmatz · Accepted Answer · 2020-12-30 17:35:24Z

2

your loop never started

change i > Hour_cap to i < Hour_cap

answered Dec 30, 2020 at 17:35

Yehonatan harmatz

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