Hello there,   the attached worksheet gives several examples of how to create implicit plots without commands and with commands.  

 

Howdy,

I am making a maplet that guides a user through crafting a Taylor series equivalent of a function. Obviously this involves finding a formula for the nth derivative of the function. Can Maple calculate this?

I need help with a coursework question. Would be greatful if anyone could help!
the question is: solve this x[i-1] + i*x[i] + x[i+1] = i where i=1,2,...n and x[0] = 0. Give your answer in decimals.

wat method would you use to solve these equations? the code I have put in is:

x[0]:=0:
for i from 1 to 3 do:
  eq[i]:=x[i-1] + i*x[i] + x[i+1] = i
od;
eqns:=seq(eq[i],i=1..3):
sol:fsolve({eqns});   assign(sol);

am i on the right path? is there anything i am doing wrong? if so, what is it?

I am multiplying an n x n matrix by an n x 1 matrix of unknowns, y(x_i), to get the result of my particular solution.  How do I create an n x n matrix with a 3 term diagonal?  For example:

b   c   0   0   0   0

a   b   c   0   0   0

0   a   b   c   0   0

0   0   a   b   c   0

On top of all the serious problems in producing questions for Maple TA, we have to contend with silly bugs like this: $a=0; $d=0; $b=$a+$d; $b is given the value -0. This looks ugly and may cause confusion if it's used in a question. I've got round this by setting $b=int($a+$d). Is there some reason why -0 is a valid result for 0+0, or is this just sloppy programming?

Hi all,

can someone show me the steps of how to do it? one of my points is a decimal, do i need to revert it to a whole number?

hey,

does anyone know how to find a cross multiple of 2 del vectors (delf and delg)?

they each have 3 variables x.y.and z.

thanks

 

i been stuck on the attached files for days and i'm stuck on the regression line

Hi,

I tried to get a 3D "surface" plot (comapreable to a matrix surface plot or matrixplot) of a list in the form:

[[xi,yi,zi],....]

where xi are the x-data, yi are the y-data and zi are some velocity data. Unfortunately I found only the possibility to draw a pointplot3d. Maybe anybody can help me.

Thanks

Dirk

<p>Hello! Its my first post.</p>
<p>I have been able to modify an example program. It uses the || operator to accumulate data into an object in the form of multiple polygonplot(...) objects. After the loop exits, I can do something like "display(obj1, obj2...)" and everything is displayed.</p>
<p>What I would like to do is instead of accumulating the data first, execute the commands to display from inside the loop of the procedure. This would hopefully eliminate the time lag before starting to draw, as well as allow me to draw more things.</p>

If my numbers is a decimal point, do i have to revert it to a whole number

Hi,

I have this taylor series expansion:

> taylor(exp(-x)*sin(x), x, 11);

Now I need to do a legendre economization. So I want to write x, x², x³ etc (from the taylor series) as linear combinations of the Legendre polynomials. My idea was to simply write something like:

>solve({aP(0,x)+bP(1,x)+cP(2,x) = x²}, {a,b,c});

This is supposed to give coefficients for the legendre expansion of x². This doesn't work because it gives solutions in terms of x, which is useless to me. Is there any way?

Good Morning, I´m sorry, but be unable to write English. I have following problem:

I need draw curve.

This is all right:

with(DEtools); with(plots):

r1 := diff(x(t), t) = (x(t)-y(t))/sqrt(x(t)^2+y(t)^2);

r2 := diff(y(t), t) = (x(t)+y(t))/sqrt(x(t)^2+y(t)^2);

sys := {r1, r2};

DEplot(sys, {x(t), y(t)}, t = 0 .. 1, x = -1 .. 1, y = -1 .. 1, stepsize = 0.5);