how do I install the linear_algebra library?

I’ve got your book. I’m working/skimming through it. I’ve hit a brick wall.

in your Readme.md you have the following snippet

from linear_algebra import distance, vector_mean
v = [1, 2, 3]
w = [4, 5, 6]
print distance(v, w)
print vector_mean([v, w])

This throws the following error:

ImportError: No module named linear_algebra

Where is the linear_algebra library from? I’ve got a feeling it should have something to do with numpy

For info I’m running python 2.7 using the anaconda stack

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State:
Created 8 years ago
Comments:12 (2 by maintainers)

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2reactions

joelgruscommented, Apr 29, 2015

So the short answer is that it’s not really set up as a library that’s “installed”, it’s just a bunch of files that you can import, but you have to already be in their directory:

Download the files somewhere on your computer, then either 2a. start IPython from the “code” directory, or 2b. start IPython and cd to the “code” directory

i.e. if you download the whole repo to c:\data-science-from-scratch, then in IPython you’d do

In [1]: cd c:/data-science-from-scratch/code

In [2]: from linear_algebra import vector_add

Let me know if you still can’t get it to work.

1reaction

joelgruscommented, Sep 28, 2019

you need the file linear_algebra.py containing the code from the “Linear Algebra” chapter.

if you download the code from this repo you’ll have it (and all the similar files)

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