Producing Data from 2D Plot Structure...

Is it possible to produce a file of something like tab delineated data via a 2D plot object? Basically all I want to do is create a data file using the points stored in the plot structure for use in a METAPOST file, and I haven't been able to come up with anything. Any help would be greatly appreciated. Thanks a lot. Keenan

I'm working on a problem for class that requires me to use dsolve but, I'm getting a generic error when I try to use dsolve the exact same way they use it in the example. my code is: A:=matrix([[-1,0],[1,-2]]); B:=matrix(2,1,[1,-1]); ics:=x(0)=matrix(2,1,[1,0]); equ:=diff(x(t),t)=A*x(t)+B; dsolve({equ,ics},{x(t)}); Error, (in solve) invalid arguments I don't know what's wrong with this since its almost exactly like the example they give for dsolve.

My class needs help...

My class was given this question as a final homework but we can't figure out how to solve it. We have talked to the professor on multiple occasions but he will not provide any help. If anyone knows how to solve this using maple, please help. The question is below... solve x(t) = Ax(t)+B where B=[1 -1] A=[-1 0 1 2] and x(0) = (1 0) Sorry for the matrix formatting but, I don't know how to use the math equations here.

How to install fourier series part 4...

I downloaded the files for this app but I did not see any instructions on installing this. Can anyone help me install this library? Thanks

Greedy Heuristic in Maple...

Maple Professionals: I wish to prgramm a greedy heuristic in maple and would be more than grateful, if someone could help me, since I am no expert in programming. The problem is a simple stocking problem. There are two parts I wish to stock in my warehouse. I know their demand, delivery time and item cost. From the demand and the delivery time I can calculate the expected backorders given a specified number of units in stock based on a poisson distribution. In the greedy heuristic step by step I increase the stock of all items by 1 and then calculate the reduction in expected backorders divided by the item cost (some kind of "bang per buck"). I then compare the reduction over all items and increase the stock by one for the item with the highest reduction.

Maple cuts my output......

Hi ! Sorry for my english... I'm finding roots of polynoms like X²+ aX + b, a and b can be very complicated, with a lot of square roots inside. When maple gimme the roots, or when i assign some variables, it try to simplifie the output, creating "subsections" named %1 or %2 etc... For example : Or How can i get the output without theses "simplifications" ?

Hi, can anyone help me with the following what is the purpose of the (1) getmath(var) command (2) getmaple(var) command (3) exportmath(var) command (4) exportmaple(var) command in addition, can i author questions for export to mathML using the standard maple package? or do i need to download and install maple TA as well? here is a sample of the type of questions i am trying to author. any inputs would be welcome. you could also send your replies to erodish333@hotmail.com thanks ! sudarshan shidore Please replace this text with the link to your file. The li

constant of integration and maple graded questions...

Hi, I'm just writing a question bank for some simple integration exercises. This causes some problems with the constants of integration and the syntax of maple graded questions: If I ask for `int(1/sqrt(x^2+4),x)` one student could give the correct answer `ln(x+sqrt(x^2+4))` and another one could give `arcsinh(x/2)`, which is correct as well but with another additive constant. In formula mode one of these results would not be acknowledged as correct. Therefore I tried to use maple graded questions and compare the differentiated results. I used the syntax like in the manual at http://www.brownstone.net/support/edu/authoring/index.html

I recently purchased Maple 10. In the user manual is described that 95% of Maple is open-coded, but in fact only eval(packagename[command]) really show the program in Maple for related toolpackages.It is far away from 95%! Where am I wrong?

How to continue line?...

Good day, Working in Document Mode. I'd like to know how to break up a long expression into multiple lines for improved readability. Does Maple support a character ... or sequence of charaters to indicate continue expression to next line and delay evaluation? .... much link Matlab's "..." sequence. For example: Format coefsoln := solve({xxi = subs(t = 0, f), dxi = subs(t = 0, df), d2xi = subs(t = 0, d2f), d3xi = subs(t = 0, d3f), xf = subs(t = tf, f), dxf = subs(t = tf, df), d2xf = subs(t = tf, d2f), d3xf = subs(t = tf, d3f)}, {a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7]})

dfieldplot...

I can easily adjust the field strength in a fieldplot, with(plots):fieldplot([x/(x^2+y^2)^(3/2),y/(x^2+y^2)^(3/2)], > x=-1..1,y=-1..1,fieldstrength=log); but the same command does not work in a dfieldplot. with(DEtools):dfieldplot(diff(y(x),x)=1/2*(-x-(x^2+4*y(x))^(1/2)), y(x), x=-3..3, > y=-3..2, title=`Restricted domain`,color=1/2*(-x-(x^2+4*y)), fieldstrength=log); How can I adjust the field strength in my dfieldplot? For simplicity, I took these examples out of the help pages in Maple10.

simple commands i cannot do....

i have a project due in my calculus class on simple harmonic motion. i have to imput the equation of s=8cos((sqrt(2)/5)*pi*t) into maple, which i can do but then i am asked to solve the equation when t is equal to 0. now i know the answer is 8 but i have no idea to make maple do that using the equation already typed in. in addition to this, i then need to differentiate the s function in order to find v and a. i am also having a hard time doing this. if anyone knows how to put these in so they will work that would be a big help.

Solve two equations in 3 variables by var1 and var...

I have two equations with 3 variables(or perhaps n equations with n+1 variables) eq1:=0=c1*A1+c2*B1+c3*C1; eq2:=0=c4*A1+c5*B1+c6*C1; I can solve by e.g. solve({eq1,eq2},{A1,B1}) or any other combination of two of the variables. But if I follow the above by solve({eq1,eq2},{B1,C1}) I get then get an error. How do I find C1 as a function of A1? There must surely be a very way simple to do this. Did check the help pages but must have missed it if it is there.