Hi,

we want to know what is the meaning of this statement?

We expect to have the following statement . But unfortunately we don,t get it

> with(difforms);
> sol := fsolve({diff(S, x) = 0, diff(S, y) = 0}, {x, y});

I do not take values above code.

Consider

> z := Int(f(t-s), s=0..1);

The result is clearly a function of t (and definitely not a function of s, which is a dummy variable).  Let's define

> F := unapply(z, t);

Then

> F(q);

as expected.  However:

> F(s);

which is not correct, as this confuses the argument s of F with the dummy integration variable s.  How would you salvage the situation?

I am performing the int operation on an experssion but it does not consider constants to be constants. For example, maple is considering this constant namely, f'(-1) or eval(diff(f(x), x), x=-1) as a function and henceforth does not give the desired output. Please tell me how to make eval(diff(f(x), x), x=-1) as a constant function or to say, how to convert any given function in to a constant function.

Thank you for your time and help!

Here is my code

ma[1] := [-885.880598855072776, [bh = 0., g0h = 0., g1h = 0.825946224722250e-4]]

ma[2] := [-877.957885609114328, [bh = 347.116836805625, g0h = 0., g1h = 0.164861392564e-3]]

ma[3] := [-863.445203144006655, [bh = 0., g0h = 0., g1h = 0.787090377403668e-4]]

avb := 90.5276611129000; avg0 := 0; avg1 := 0.92225359e-4;

for j from 1 to 3 do

assign(ma[j][2]);

A[j] := [(avb-bh)^2, (avg0-g0h)^2, (avg1-g1h)^2] 

end do;

Result is that

A[1] := [4763.19965962732, 0., 1.13103562500664*10^(-10)]

Error, invalid left hand side in assignment

 it only shows A[1], but no A[2] and A[3]

Please help!

Hello,

Is it possible to create animation of convolution of two functions?

For example f(t)=u(t)-u(t-2) and g(t) = tu(t)-(t-4)u(t-4), where u(t) is a step function.

I would like to generate animation for this convolution.

Any help would be appreciated.

Thanks.

Here is my code

ma[1] := [-885.880598855072776, [bh = 0., g0h = 0., g1h = 0.825946224722250e-4]]

ma[2] := [-877.957885609114328, [bh = 347.116836805625, g0h = 0., g1h = 0.164861392564e-3]]

ma[3] := [-863.445203144006655, [bh = 0., g0h = 0., g1h = 0.787090377403668e-4]]

aver := [bh = 121.477814540743, g0h = 0.249071340242633e-5, g1h = 0.110740782334817e-3]

when i did

add((aver[1]-ma[j][2][1])^2, j = 1 .. 3)

it shows some error...

how to solve this problem??

related topic is here

Suppose I have 2 differential equations in vector form, and I want to solve them using dsolve. I am not able to figure the syntax for what I would do for scalar ODE to initial its derivative at t=0, which is D(x)(0)=some_value, but do the same when x is a vector.

Here is an example:

restart;
x := t-> <x1(t),x2(t)>;
eq:=diff~(x(t),t$2) =~ <sin(t),t>;
ic1:=x(0)=~0;

So far so good. Now I wanted to also make initial conditions for derivative at zero to be some value. Only syntax I know is using D(x)(0)=some_value. But this works for scalar ODE. When I tried

ic2:=D(x)(0)=~0;

I got

This does not work:

ic2:=diff~(x)(0)=~0;

any help on the correct syntax to use? I am using Maple 2015

Does anyone know how to using some softward convert ?  for example  I have maple code , but I want to using mathematica code .I need fast way.

I have 16 running on 32 bit xp computer, but I cannot install on 64 bit m/c with windows 8.1.

Have tried -r ,-f, -i options as in install.html, but install log says nothing installed.

How do I install ?

Download series.mw

series.mw

To run Maple script, on windows, I type

cmaple.exe   my_file.mpl

and this works well. So if my_file.mpl has the line int(sin(x),x);  the result of the above is:

> int(sin(x),x);
                                                        -cos(x)
> quit
memory used=0.9MB, alloc=8.3MB, time=0.05

sometimes, it will be nice to use cmaple to quickly do one time calculation on the fly such as the above, without having to open Maple GUI or write/edit a file. For example, I'd like to be able to do something like

cmaple.exe   "int(sin(x),x);"

but ofcourse the above does not work as is, since it expects its input to be a file. I tried

cmaple.exe   << "int(sin(x),x);"

but that did not work (for obvious reasons, since the input string is not a file name).

I tried different re-directions, as shown in this page for windows, but maple expects the input to be a file.

Is there a way to use cmaple with command directly written as string as above? I am using Maple 2015.

I cannot make Maple 13 read the maple.ini file no matter where it is located.

I am using Windows 7, 64 bit.

I thought that ...maple 13\bin.win would do it.

The file contains a few commands of mine. Three of these commands

"read" three procedure files A.m, B.m C.m. respectively, and the other two

are

with(LinearAlgebra):
with(DEtools):

Could somebody up here direct me properly about this?

I would appreciate it.

Thank you!

mapleatha

There is no menu item called "Startup Code"

in the "Edit" menu item of my Maple 13.

Please help!

Thanks!

I would like to create a variable name that consists of a greek letter and an english letter. For example, δx.   If I type

>delta = 5;

Maple displays the output as δ = 5

However, I would like to have variable names that are output as δx.

Is there a way to do this in worksheet mode? I tried cat(delta,x) but that just gave me deltax.

Thanks for your help,

Harish

hi friends

i have a problem in maple with an error

dsnumsort:=proc(numpr::list,coor::list)
local i,j,n;
global C1,C2,C3,V1,V2,V3;
n:=nops(coor):
print("Order of the variables:");
for i from 2 to 2*n +1 do
for j from 1 to n do
if[numpr[i]]=
select(has,numpr,diff(coor[j](t),t)) then
C[j]:=i-1;V[j]:=i;
print(coor[j],C[j]," ",diff(coor[j](t),t),V[j]);
fi;
od;
od;
end :

Us:=subs(G=1,m=1,L=1,U):
D2r:=[diff(z(t),t,t),diff(x(t),t,t),diff(y(t),t,t)]:
g:=subs(z=z(t),x=x(t),y=y(t),grad(Us,[z,x,y])):
IniC:=z(0)=0.75,D(z)(0)=0, x(0)=1,D(x)(0)=0,y(0)=0,D(y)(0)=1:

Ns:=dsolve({seq(D2r[i]=g[i],i=1..3),IniC},{z(t),x(t),y(t)},numeric);

dsnumsort(Ns(0),[z,x,y]):

for i from 0 to 1000 do ;
T:=i/25;
NsT:=Ns(T):

X[i]:=rhs(NsT[C1]); Vx[i]:=rhs(NsT[V1]);
Y[i]:=rhs(NsT[C2]); Vy[i]:=rhs(NsT[V2]);
Z[i]:=rhs(NsT[C3]); Vz[i]:=rhs(NsT[V3]);

KepVec[i]:=convert(crossprod([X[i],Y[i], Z[i]],[Vx[i],Vy[i], Vz[i]]),list);
KepAbs[i]:=norm(KepVec[i],2);
od:

but i see this error and I can't draw PLOT:

Error, invalid input: rhs received Ns(0)[C1], which is not valid for its 1st argument, expr

this cods is for draw plot:

spacecurve({[seq([X[i], Y[i], Z[i]], i = 0 .. 1000)], [[-1/2, 0, 0], [1/2, 0, 0]]}, labels = ['x', 'y', 'z']);

spacecurve([seq(KepVec[i], i = 0 .. 1000)], orientation = [0, 90], labels = ['x', 'y', 'z'])

plot([seq([(1/25)*i, KepAbs[i]], i = 0 .. 1000)], labels = ['t', 'MofI'])

can you helpe me?Thank you