Given two vectors x,y, in 2D or three vectors x,y,z in 3D space, compute the area (or volume) of the parallelogram they define.
V = 1;
X=[1,0,0]'; Y=[0,1,0]'; Z=[0,0,1];
V = 1;
When did the "function ans = " trick start working again?
It started to work when Cody server upgraded its MATLAB to R2016b. So strictly speaking, it's not just a Cody trick, but a MATLAB R2016b feature. This feature was somewhat discontinued in R2016a, but it works in many earlier versions.
Which doors are open?
Given a 4x4 matrix, swap the two middle columns
Sum the numbers on the main diagonal
Create a two dimensional zero matrix
Non trivial identities - differentiation
Probabilities - Balls and urns - 01
Non trivial identities - flipping
Probabilities - Balls and urns - 02
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