Question

Make a matrix which has dimension [0.04:0.01:0.53] as first column, the volume Vsphere = as second column, volume Vcube = as the third column, the difference = (Vsphere Vcube) as the fourth column. Make a plot between Vsphere and L, Vcube and L, and difference and L. Note: You must use for loop

Answer 1

import numpy as np
import matplotlib.pyplot as plt
import math

matrix=np.zeros([3,4])
matrix[:,0]=[0.04,0.01,0.53]

for i in range(3):
    matrix[i,1]=(3*math.pi*(matrix[i,0]**3))/4
    matrix[i,2]=matrix[i,0]**3
    matrix[i,3]=matrix[i,1]-matrix[i,2]
print(matrix)

for i in range (3):
    temp=131+i
    plt.subplot(temp)
    plt.scatter(matrix[:,0],matrix[:,i],label= "stars", color= "green",marker= "*", s=30)
    plt.xlabel('dimensions')
    plt.ylabel('result') 
    plt.legend() 

plt.show(   )