Rainbow Matrix CMD

I want to run the Matrix.bat CMD with a different color on each line to make a rainbow effect. Here is the Matrix.bat I have tried experimenting myself but have not succeeded with my low level experience. Here is where I got with my experimentation. When I tried this it changed the whole command prompts … Read more

data type not understood

Try: Since the shape parameter has to be an int or sequence of ints http://docs.scipy.org/doc/numpy/reference/generated/numpy.zeros.html Otherwise you are passing ncols to np.zeros as the dtype.

numpy matrix vector multiplication

Simplest solution Use numpy.dot or a.dot(b). See the documentation here. This occurs because numpy arrays are not matrices, and the standard operations *, +, -, / work element-wise on arrays. Note that while you can use numpy.matrix (as of early 2021) where * will be treated like standard matrix multiplication, numpy.matrix is deprecated and may … Read more

How to define a two-dimensional array?

You’re technically trying to index an uninitialized array. You have to first initialize the outer list with lists before adding items; Python calls this “list comprehension”. #You can now add items to the list: Note that the matrix is “y” address major, in other words, the “y index” comes before the “x index”. Although you … Read more