Installing MATLAB
You can acquire a MATLAB license and instructions for installing the software by sending an email from your LDEO or Columbia University email account to: askit@ldeo.columbia.edu.
MATLAB uses a license server on campus and thus may only run when your computer is on the university network, or if you remotely connect using the LDEO VPN server.
Sample Code
x = 1:10;
y = x.^2;
figure;
plot(x,y,'.-')
Getting help
Open the MATLAB help documentation, which can be accessed by the "Help" button on the MATLAB main window or you can type "doc" in the command window.
Online resources
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MATLAB Central - knowledge base for MATLAB users
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MATLAB File Exchange - free user contributed MATLAB routines and libraries.