Feeds
提问
How do I change the direction of a quiver vector at the same time change the sign of its magnitude ?
Hi! I am plotting a velocity field with the help of quiver. I want to reverse the direction of some of the vectors, but at th...
8 years 前 | 2 个回答 | 0
2
个回答提问
How to find the pixel information at a point whose coordinates are known ?
I have a set of (x,y) coordinates and I wish to know the values of pixels at each of these points. How do I do that. Normally,...
8 years 前 | 1 个回答 | 0