Tips for Maple

Generals

run Maple
1. Open a terminal using PuTTy, and connect to grendel.ece.ncsu.edu
2. setenv DISPLAY 152.14.92.29:0.0
3. run X in local window machine
4. add maple110;xmaple &
2D math mode
Use the Backspace and Delete keys to correct typing errors. Don't forget the semicolon - every command ends with a semicolon.
online help: ?command
restart clears all of Maple's former memory including errors and allows you to start afresh
eval evaluate an expression with specific values, eval( 3*x*ln(x^3), x=r^(1/3));
evalf evaluate using floating-point arithmetic, evalf( exp( Pi^2 ) );
with load a Maple package, with( DEtools ); with( plots ):
x := 4; diff( sin(x), x ); --> Error, x := 'x'; use quote key right of semicolon key, this clears value of x
To refer to the output of the previous computation use %, % Most recent, %% Second most recent, %%% Third most recent
{ } is used in lists of functions, equations or variables where order of listing is unimportant, as in solve( {x + y = 1, 2*x + 7*y =0}, {x,y} );
[ ] is used in ordered lists as in vector [1,2,3]

Command

Solve

solve( {x + y = 1, x^2 - y = 1}, {x,y} );
mysolns := allvalues(%, 'd'); use quotation mark right of semicolon key. Recall that % refers to the result of the previous computation. (Be careful about the d - see what happens if you drop it, or try ?allvalues). Of these solutions, we want the one for which x,y are positive, so we approximate these solutions using
evalf( mysolns, 4 );
fsolve attempt to obtain the approximate solutions. fsolve( 7*cos(x) + x + x^2 = 15, {x}, x=3..4 );

Plot

plot( x^2, x=-1..1 );
Plotting Planar Curves: Planar curves are given in one of the three forms - explicitly as in (a parabola), implicitly as in (a circle), or in parametric form as in , (a cycloid). Curves may also be given in polar form as in the three leaved rose. To draw two explicitly given curves and y=1-2x over the interval [0,1], use plot( {x-x^2, 1-2*x}, x=0..1 );

Matrix