Here is some Matlab code I wrote (or adapted) to perform various tasks.
Few of it can hardly be called "rocket science", but i spent enough days on it than it would warm my heart to know you won't have to waste as much as i did.
DATA ANALYSIS
Centering and standardization of matrices
Distribution given number of bins
ELEMENTARY MATHEMATICS
Taper based on the Hyperbolic Tangent function
Zonal integral, zonal average on the sphere
MAPPING (download M_Map package first)
Improved Figure command (from Aslak Grinsted)
contourpm_white
Gorgeous contour map with (+,0,-) contours in white.
COLORMAPS
cejulien.m cejulien2.m bluewhitered.m
(usage : colormap(bluewhitered) after a contour plot, for instance)
Useful Matlab resources :
M_Map package by Rich Pawlowicz (AWESOME... a lot of my mapping routines directly use his)
Mathtools, Mathworks Central File Exchange