MAPLE codes to plot  the direction field + solution curves;

MATLAB codes to plot the direction fields (you need both of them): main_dir_field.m and dir_field.m


Matlab Notes

N1 A Quick Introduction to Matlab (pdf) N5 Symbolic Computation in Matlab
N2 Basic Arithmetics and Array Operations N6 Polynomials in Matlab
N3 Script Files, Function Files and Inline Functions N7 Matrices and Vectors
N4 Function Plotting N8 Linear Systems of Algebraic Equations (pdf)



Mathworks (Producer of Matlab) has a list of demos. You can also search for "tutorials" on this site.

One particular tutorial: Getting Started With MATLAB

Another particular tutorial: Matlab Tutorial Information

Here is a new, comprehensive tutorial. You can also download and print the corresponding postscript file.

A very comprehensive MATLAB web page can be found at the University of Maryland.