My python lap is about practicing vectors and matrices. Here is the first part of my lab.

For the second part Im supposed to get the first column and second to last column from X, but Im not sure how to do this.

1. Example 1.1 Load data with pandas In [40]; import numpy as np import pandas as pd # load data with pandas df = pd. read_csv('cars.csv') # print (df) # convert a pandas dataframe to a numpy array X = df.values[:, 1:-1] print(type (x)) print(X.shape) print(X) (406, 7) [[18.0 8 307.0 3504 12.0 70 ] [15.0 8 350.0 3693 11.5 70] [18.0 8 318.0 3436 11.0 70] [32.0 4 135.0 [28.0 4 120.0 [31.0 4 119.0 2295 11.6 82] 2625 18.6 82] 2720 19.4 82]] 1.2 Operation for vector In [29]: #Get first row and the second to last row xl = X[0, :] x2 X[-2, :] print(x1) print(x2) # Addition y = x1 + x2 print(y) [18.0 8 307.0 130 3504 12.0 70] [28.0 4 120.0 79 2625 18.6 82] [ 46.0 12 427.0 209 6129 30.6 152] 1.3 Operation for matrix In [32]: # Get first 5 rows and last 5 rows ml = X[0:5, :] m2 = X[ -5:, :] print(ml) print (m2) # Subtraction m = ml - m2 print(m) [[18.0 8 307.0 130 3504 12.0 70] [15.0 8 350.0 165 3693 11.5 70] [18.0 8 318.0 150 3436 11.0 70 ] [16.0 8 304.0 150 3433 12.0 70] [17.0 8 302.0 140 3449 10.5 70]] [[27.0 4 140.0 86 2790 15.6 82] [44.0 4 97.0 52 2130 24.6 82] [32.0 4 135.0 84 2295 11.6 82] [28.0 4 120.0 79 2625 18.6 82] [31.0 4 119.0 82 2720 19.4 82]] [[-9.0 4 167.0 44 714 -3.5999999999999996 -12] [-29.0 4 253.0 113 1563 -13.100000000000001 -12] [-14.0 4 183.0 66 1141 -0.5999999999999996 -12] [-12.0 4 184.0 71 808 -6.600000000000001 -12] [-14.0 4 183.0 58 729 -8.899999999999999 -12]] 2 Task 2.1 Get the first column and the second to last column from X In [36]: # this is your code to get two vectors