Hi:

how i can plot the function in terms of different values of n in a figure:

f(x)=1+2*(1+x)^n

n=1,2,3,4

x-axis->x

y-axis->f(x)

The toggle button in the embedded components has a default image which points up and down. Is there any way to rotate this image so that it points left and right?  I though I might actually just rotate the default image gif(?) directly, but the properties window does not give the location of the gif(?) used for this image. I also can't locate the image file simply looking at the Maple program folder. Otherwise, I have to go find or create an image of my own.

Good Afternoon Everyone,

Would anybody be kind to help me with the interpolation of two variables in a table to obtain a value for f18.1 (Stiffness) and f18.2 (Damping) given SR_ratio and Lamda_ratio.

Regards

Moses

Download Dynamic_Table.mwDynamic_Table.mw

Good Afternoon Everyone,

Would anybody be kind to help me with the interpolation of two variables in a table to obtain a value for f18.1 (Stiffness) and f18.2 (Damping) given SR_ratio and Lamda_ratio.

Regards

Moses

Hi:

how i can plot the function f(x) in term of 1/x in maple?for example i have the function f(x)=x^2 and x=0..1,now i plot f(x) in term of 1/x.

expand( (a+b)^n)

convert((a+b)^n,Sum) 

none  expands in  binomial  form.  Is there any way for Maple to generate  binomial  expansion of (a+b)^n  without

entering  manually.

martin

It is possible to add groups of questions to an assignment in Maple T.A. But how do you see the grades divided into these groups? As an example, suppose we have two groups of questions say 5 questions in the group "algebra" and 5 questions in the group "geometry". The class grades show the grades for all 10 questions all together, but I would like to see the grades for two groups individually.

I have few ode's which are solved by dsolve, but I am not able to get a zero from odetest(sol,ode). I tried the implicit option on the one which returns implicit solution, but I still do not get zero. I tried useInt as well.

Is there something else to do to verify the solution? My understanding is that if Maple returns a solution from dsolve, there there should be a way to get odetest() to verify the solution, but I could be wrong. Here are few examples, I have more if needed. This is Maple 18.01 on windows 7

restart;
MathematicalFunctions:-Version();
#       "C:\Program Files\Maple 18\lib\DEsAndMathematicalFunctions18.mla", `2014, July 25, 21:22 hours`
unassign(`print/ODESolStruc`):
ode1:=diff(y(x), x)+2*tan(y(x))*tan(x)-1:
ode2:=2*(diff(y(x), x))-3*y(x)^2-4*a*y(x)-b-c*exp(-2*a*x):
ode3:=(x^2+1)*(diff(y(x), x))+(y(x)^2+1)*(2*x*y(x)-1):
ode4:=x^7*(diff(y(x), x))+(2*(x^2+1))*y(x)^3+5*x^3*y(x)^2:
ode5:=(y(x)-x)*sqrt(x^2+1)*(diff(y(x), x))-a*sqrt((y(x)^2+1)^3):

sol1:=dsolve(ode1,y(x)):
sol2:=dsolve(ode2,y(x)):
sol3:=dsolve(ode3,y(x)):
sol4:=dsolve(ode4,y(x)):
sol5:=dsolve(ode5,y(x)):

odetest(sol1,ode1,implicit);  #not zero
odetest(sol2,ode2);             #not zero
odetest(sol3,ode3,implicit);  #not zero
odetest(sol4,ode4,implicit);  #not zero
odetest(sol5,ode5,implicit);  #not zero

a:=Vector([2,3,4,5]);

select[flatten](x->x>=3,a);

This returns a Vector that satisfies the above condition. What's the most efficient way to get the indices of those entries?

For example, a list l:=[2,3,4] that correspond to the a[l] entries that satisfies the above condition.

l:=[2,3,4];

a[l]; # gives the same answer

Thanks,

casper

I am going by the assumption that when Maple returns ODESolStruct as solution, then it means it could not solve the ODE. (example below)

My only complaint is that the syntax it uses for saying that the solution is ODESolStruct is not clear. I guess one has to look for & in the solution to know the result is ODEStruct.

http://www.maplesoft.com/support/help/Maple/view.aspx?path=dsolve%2fODESolStruc

Only when I convert the solution to string, then I can see the word "ODESolStruct" displayed.

My question is, how can I make maple display on the screen the word "ODESolStruct" in the solution, instead of using those "&" As that will make it more clear.

I am using worksheet on maple 18. Not document style. Here is an example:

restart;
ode:=diff(y(x),x$2)+a*exp(x)*sqrt(y(x));
sol:=dsolve(ode,y(x));

 The above was using 2D math display as default. If I use Maple notation as output I get:

----------------------------------------

restart:
ode:=diff(y(x),x$2)+a*exp(x)*sqrt(y(x)):
sol:=dsolve(ode,y(x));
sol := y(x) = `&where`(_a/exp(-2*(Int(_b(_a), _a))-2*_C1), [{diff(_b(_a), _a).......

-------------------------------------------

But now

convert(sol,string);
"y(x) = ODESolStruc(_a/exp(-2*Int(_b(_a),_a)-2*_C1),[{diff(_b(_a\ .............."

You can see now that the solution is ODESolStruct, but it is much more clear than the default solution above. But only when looking at the solution as string do I get it to show the word "ODESolStruct". 

Since odetest does not return zero, then maple did not solve it:

odetest(sol,ode);

btw, Compare the above to when Maple returns "DESol" structutre. In this case, it does now display on the screen the word "DESol":

restart;
ode:=diff(y(x), x, x)-y(x)*(a^2*x^(2*n)-1);
dsolve(ode,y(x));

Again, my question is:  Could I configure Maple to display in worksheet the solution using explicit ODESolStruct words instead of using "&" there to indicate more clearly the solution.

I have a large system of non-linear equations. Is there any way to get Maple to remove the duplicate equations in the system? For example Maple doesn't recognise that x-y =0 is equal to y-x=0. 

When Matrix or Vector output that has variables with assumptions on them (and therefore with tildes on them) is copied and pasted to the expression argument of a map( ) function, the map code cannot find the assumptions. Of course, when it is pasted in appears in the input with the tildes.  It then seems to not recognize the tildes as indicating assumptions on the base name.

If, on the other hand, the output is directly saved to a name, and that name is used in the input to the map( ) function, then the assumptions are recognized and the output is correct. It seems that in this case, the tilde is an output phenomenon that is not recognized on input. Apparently, the save output is not saved with the tilde.

Here is a simple example:

> assume(a>0, b<0);
   v:=<a,b>;

   see_assump:=proc(x)
     print(getassumptions(x));
     x;
   end proc:

map(see_assump, v);

map(see_assump, <a~, b~>;
map(see_assump, <copied from output of v assignment statement above>);

The first map statement shows the assumptions, the second two just give empty brackets { }.

Attempting to use more complicated procs that require the assumptions in the map( ) function leads to incorrect answers or failure to evaluate in the last two cases.

I'm trying to limit the solutions of an equation to only positive values. I already found "with(RealDomain)" to ignore complex solutions.

Now I try something like

but that does not work, I still get both +sqrt(2) and -sqrt(2).

hi maple-friends !

who can help me??

QUESTION 1:

i want to extract (export) the data of let me say the function y=x^2 ...

the result shpuld be:

without the variables !  (x=)   (y=)

1         1

2         4

3         9

and so on...

that means just a matrix...of numbers.

QUESTION 2:

and waht i have to do if i need more values, including non-integers as x (example: x=1.1, 1.2,1.2 ... )

sorry, im a maple beginner and a lot of the advices in the books are not very helpful !!!   maybe only written

for experts ??   so by the way, does anybody know about a REALLL good BEGINNER-book for maple?

thanx a lot !   :-)

Let x:=2*[x_1,x_2,...,x_n];   y:=3*[x_1,x_2,...,x_n]; If I input x+y, it will turn out  5*[2x_1,2x_2,...,2x_n]; But I want to get  5*[x_1,x_2,...,x_n]. What should I do? Thanks!!

Maple 18.01, windows

restart;
ode:=2*a^2*y(x)-2*y(x)^3+3*a*(diff(y(x), x))+diff(y(x), x$2)=0;
dsolve(ode,y(x));

           returns y(x)=0

So does

ode:=2*a^2*y(x)-20*y(x)^3+3*a*(diff(y(x), x))+diff(y(x), x$2)=0;

ode:=2*a^2*y(x)-200*y(x)^3+3*a*(diff(y(x), x))+diff(y(x), x$2)=0;

ode:=2*a^2*y(x)-2000*y(x)^3+3*a*(diff(y(x), x))+diff(y(x), x$2)=0;

etc...

Is this a bug?