问题
I am sorry if this doesn't really belong here but I'm looking for a way to describe the mathematical background of my code. Using numpy I sum two more dimensional arrays:
a.shape = (10, 5, 2)
b.shape = (5, 2)
c = a + b
c.shape = (10, 5, 2)
Is there a pure mathematical notation for this (so WITHOUT indroducing for-loops or numpy conventions in my text)? What I'm trying to avoid is to have to write something like this:
c_{1, y, z} = a_{1, y, z} + b_{y, z}
c_{2, y, z} = a_{2, y, z} + b_{y, z}
...
c_{10, y, z} = a_{10, y, z} + b_{y, z}
Any thoughts?
Edit: I'm using LaTeX for the documentation, so indexing is no problem. I'm currently using more or less the suggestion from Tobias. I was just hoping that there may be some other solution I haven't thought of.
回答1:
Just write
for 
.
You find this form often in books on numerics like Numerical Recipes (e.g., page 57).
If you have larger sections of code an alternative is to use pseudo-code.
来源：https://stackoverflow.com/questions/22410175/clean-mathematical-notation-of-a-for-loop