Dear all

if I have a vector defined as u[1..11,1]:=

How can display the coeffients of  this vectors 
can I plot the vector 

Thanks for any help

dear all

I have a linear system AX=b , I would like to compute the solution using Gradient conjugate method 

CS.mw

I get the following error
Error, (in LinearAlgebra:-LinearSolve) method SparseIterative incompatible with data of type anything
 

Thank you for any help

Dear all

I would like to plot two different functions

One constructed using piecewise and second function on the sme interval. 

The code run without error but I am not sure that its true, since we have two different function but in the graph we can not see the difference betweem them 

codexsqrr.mw

Thank you for your help

Dear all
I have a problem using unapply to construct all functions defined in each intervals.
If I use unapply to construct only two peicewises fuctions the code work well, but otherwise there is someting missing 
splineProb.mw

## using code like this, its run 
ff:=unapply
                  ( piecewise
                    ( x < eval( Xlist[2], NaturalCoeffs),
                      expand( eval( S[1], NaturalCoeffs) ),
                                           expand( eval( S[3], NaturalCoeffs) )
                    ),
                    x
                  );
 

but using code like 
 

unapply
                  ( piecewise
                    ( x < eval( Xlist[2], NaturalCoeffs),
                      expand( eval( S[1], NaturalCoeffs) ),
                     ( x < eval( Xlist[3], NaturalCoeffs),
                      expand( eval( S[2], NaturalCoeffs) ),

                      expand( eval( S[3], NaturalCoeffs) )
                    ),
                    x
                  );
does not run and return 
Error, `;` unexpected
 

Thank you for your help 

dear all

I hope to write taylor expansion with remainder lagrange ..That is taylor lagrange expansion of a given function.

I tried 
series(cos(x),x=0,5) 

or taylor(cos(x),x=0,5) 
always the remainder written USING O(x^6)
I want the reminder depend on the derivative ..that is Lagrange Taylor expansion

Many thanks

Dear all

with(ExcelTools);

data := Import("datatest.xlsx");

I get flotting point like 15.0 , 25.0  in my data
How can get or transform data to integer ( without floating point)  that is instead of 15.0  I would like if possible to obtain 15 

Many thanks

dear all 
I need to plot many curves on the same  figure. 
with(plots):
for j from 1 to 6 do 
pf[i]:=plot(f, x = a[i]..a[i+1]);
end do 
How change the following line so that I can plot many curves like 20 or more, using sequence or someting similar
display(pf[1], pf[2],pf[3],pf[4],pf[5],pf[6]})

many thinks

Hello friends,

I have an image in black and white and I wanted to compute and plot the intensity distribution histogram of it. So I did it with the command PlotHistogram, here's the output:

> PlotHistogram(Lena, 256)

I established the number of buckets to 256 but I don't see them at the x-asis, and I would like to see them for clarity as I don't understand the scale that is used by default. Could you help me achieve this and maybe also understand the scale used by default?

Thanks a lot.

Dear all

I have a matrix defined using loop 

How, can I print the value of the  matrix

Print_vaue_G.mw

thank you

Dear all

I have a table with entries obtained using maple code, how can I copy this table to powepoint as image 

many thanks

Dear all
I have a problem when running the follwoing code using the input proposed. 

integ_R.mw

problem : print_table , used as input in  proc 

Thank you for your help 

Dear all

I tried to compute an integral using trapezoidal rule using two differents methods but I get two different results
trap.mw

Thank you for your help 

Dear all

I would like to sketch the solution of first ode, but by hand we can not get the solution. I used maple, to  solve the ode but unfortunattely there is no solution obtained so I can sketech the behavior of the solution. 

Is there any way to sketch the solution behavior .

sketch_solution.mw

thank you 

In using maple 17, for a for loop, the alias command is valid outside the for loop, but entering the for loop, maple verifies that alias is not recognized.The code is as follows:
with(PDEtools):
for k from 1 to 4 do
alias(u[k]=u[k](x,y,t));
alias(a[k]=a[k](x,y,t));
od:
print(has(a[1],x));
sol:=[]:
for i from 1 to 4 do
sol:=[sol[],a[i]=rhs(isolate(a[i]+diff(a[i],x)+i=0,diff(a[i],x)))];
print(has(a[i],x));
end do;
The output is as follows: thequestionofalias
true
[a[1] = a[1] + 1]
false
[a[1] = a[1] + 1, a[2] = a[2] + 2]
false
[a[1] = a[1] + 1, a[2] = a[2] + 2, a[3] = a[3] + 3]
false
[a[1] = a[1] + 1, a[2] = a[2] + 2, a[3] = a[3] + 3, a[4] = a[4] + 4]
false
Why is it outside the loop? A [1] ... A [4] has the variable x, but either a [ I ] or a [1] has no variable X.Send the question to the Forum and see which expert can answer it. See how you can make the alias command work inside a for loop! I'd appreciate it if you could answer that!

How to solve this integral equation?

rho:=1/(2);

mu:=1/(2);

T:=1/(4)*(t-x)^(1/(2));

E[rho,mu](T):=Sum((T^(k))/(GAMMA(k*rho+ mu)),k=0..5);
                       
eq1 := h(t) = (8/3)*(int((t-x)^(1/2)*E[rho, mu](T)*(1/(sqrt(Pi)*x^(1/2))-(3/32)*x^2+(3/16)*exp(-x)-1), t = -1 .. 1));       

 

Download 1.mw