The help page ?type/protected states:

The set of protected names in Maple can be computed with select(type, {unames(), anames(anything)}, protected).

However, the result of this computation is "time dependent". I.e. repeated execution of this command produce different sets. E.g. executed in a fresh session:

If I have a polynomial in terms of x, is it possible to extract the coefficient of x^2 easily (without copying and pasting)?

The coefficients of the polynomial are large and ugly and not worth typing out.

If there's no command for getting the coefficient, perhaps I could map my polynomial (which is, say, P=ax^3 + bx^2 + cx+d) to a vector space where x^3 = (1, 0, 0) = v1, x^2 = (0, 1, 0 ) = v2, x = (0,0,1) = v3 and P = av1 + bv2 + cv3 + d.  And then the coefficient of b would be the dot product of P with v2.  But I don't know how to do this either!

Hi

I am quite new to Maple and to these forums so please be gentle with explanations! I have a series of procedures which i would like to save as a package so that when i open a new worksheet i can type with (...) and all the little programs will be loaded. How do i do this?

When I open my file I get this message....What does it mean??? Why it appears?

 

 

 

I don't know if it's clear, but what I want is write a formula  ...And I'd like it to treat it as Text not math (I don't want Maple to execute it, of course appears an error message if so)

I looked over the FAQ's and I was not doing anything wrong according to them but I have tried graphing all of the following and got blank graphs as a result every time. I am using Maple 12 on Mac OSX Leopard 10.5.4. plot3d((2*x^2+y^2)*e^(1-x^2-y^2), x = -1 .. 1, y = -1 .. 1, axes = normal, scaling = constrained, numpoints = 10000) implicitplot3d((2*x^2+y^2)*e^(1-x^2-y^2), x = -10 .. 10, y = -10 .. 10, z = -10 .. 10, axes = normal, scaling = constrained) implicitplot3d((z = 2*x^2+y^2)*e^(1-x^2-y^2), x = -10 .. 10, y = -10 .. 10, z = -10 .. 10, axes = normal, scaling = constrained)

I have a worksheet saved, but if I try to continue where I left off, Maple has forgotten what all the variables mean and what their values were. 

It's not like I have to retype everything - the commands are still there - but I have to press enter about a hundred times to reenforce what the meanings of all the variables were. 

Is there a way to save it in such a way that you don't lose such information?

This is what I ve to solve...It's simple!And it works, but if I write:

>fsolve({2*x + y = 1, x - y  = 2}, {x, y});

>y;

it writes y and to the value that solve the sistem!Did you understand?How can I do it?

 

>fsolve({2*x + y = 1, x - y  = 2}, {x, y});

Hi,

I have the following (simplified here) formula:

G = ∫∫ g dp (n * dr)

The last part "(n*dr) is actually a dotproduct. How do I put this in Maple? Usually you use something like "G:=Int(Int(g dp (n), p=0..1), r=0..1) but than I don't have a dotproduct between "n" and "dr".

Tim

 

How do I build a cobweb plot of a recursion equation in Maple?

for example,if we have a table T=table([aa=2, bb=3 cc=4, dd=5]),how can we get another table(2=aa,3=bb,4=cc,5=dd) ?

another question:
if we have table([aa=3,bb=5,cc=1,dd=3]),how can we output indices according to entries' ascending order?

thank you

i would like to know any of you guys have any ideas on forecasting economy. basically using different equations and its command in Maple?

Is there a way to convert a complex expression into the form a + ib (splitting it into its Re and Im parts) , even if the expression that you want to convert is in terms of a variable?

ie, I have something like f(r) and I want to put it in the form a(r) + i b(r)

How do I set maple to work with this units kN (kilo newtons), MN (mega Newtons 1MN= 10^6 N)??'  I'm Just starting with maple. Thanks for your help!

Hi All,

Would anybody be able to explain to me how to find the steady state temperature distribution in maple using the finite difference method?

 

Any help wouild be greatly appreciated.

 

Cheers

 

Joel