Assuming I have a numpy array like:
[1,2,3,4,5,6]
and another array:
[0,0,1,2,2,1]
I want to sum the items in the first array by group (the second array) and obtain n-groups results in group number order (in this case the result would be [3, 9, 9]). How do I do this in numpy?
I’m using right now the scipy.integrate.quad to successfully integrate some real integrands. Now a situation appeared that I need to integrate a complex integrand. quad seems not be able to do it, as the other scipy.integrate routines, so I ask: is there any way to integrate a complex integrand using scipy.integrate, without having to separate the integral in the real and the imaginary parts?
I found out that it’s impossible to install NumPy/SciPy via installers on Windows 64-bit, that’s only possible on 32-bit. Because I need more memory than a 32-bit installation gives me, I need the 64-bit version of everything.
I am new to programming. In my latest Python 2.7 project I encountered the following:
I face some problem here, in my python package I have install numpy, but I still have this error:
I am trying to concat the following dataframes:
I’m a complete rookie to Python, but it seems like a given string is able to be (effectively) arbitrary length. i.e. you can take a string str and keeping adding to it: str += "some stuff...". Is there a way to make an array of such strings?
I would like to implement itertools.combinations for numpy. Based on this discussion, I have a function that works for 1D input:
I am trying to read in a csv file with numpy.genfromtxt but some of the fields are strings which contain commas. The strings are in quotes, but numpy is not recognizing the quotes as defining a single string. For example, with the data in ‘t.csv’:
When plotting a graph with a discontinuity/asymptote/singularity/whatever, is there any automatic way to prevent Matplotlib from ‘joining the dots’ across the ‘break’? (please see code/image below).
I read that Sage has a [detect_poles] facility that looked good, but I really want it to work with Matplotlib.