Transforming a list to a column vector in Python

Question

I was wondering if there\'s a function that takes a list X as input and outputs a column vector corresponding to X?

(I looked around and I susp

Answer 1

A list is a native type of Python, whereas a numpy array is a numpy object. You will need to convert your list to a numpy array first. You can do something like the following.

x = list(range(5))
print(x)

[0, 1, 2, 3, 4]

x_vector = np.asarray(x)

array([0, 1, 2, 3, 4])

Now, Python does not know whats the difference between a row vector and a column vector, that is up to how you will use the vector. The current vector is 1x5. If you want 5x1, you can take the transpose by either

x_vector.T

or

np.transpose(x_vector)

However, since this is a 1D matrix, the transpose is the same as the non-transposed vector in memory.