数学解析，微分图形，加事例，一个相对具体的教学用得实列，运用gnuplot成形-mathematical analysis, differential graphics, plus examples of a relatively specific teaching solid series Forming use gnuplot

Mathomatic is a portable Computer Algebra System (CAS) that can solve, simplify, and compare algebraic equations, perform simultaneous real number, imaginary number, and polynomial arithmetic, etc. It does some calculus and is very easy to comp

a program which evaluates the equation of time, a formula for the difference between the uniform 24 hour day and the actual position of the sun, creating data files that can be plotted with gnuplot, based on a C program by Brian Tung