## bifurcation diagram plot ...

Dear all

I compute by hand the bifurcation point of an ode,
I fouded x=-1/2 a+ 1/2 corresponding to  h= (a+1)^2/4  with 0<a<1

The same solution is obtained using Maple code.
I tried to plot the birfurcation diagram to stech with kind of bifrucation ( saddle, Holf . transcritical , periodic, or someting else)
But I get
Error, (in plots/implicitplot) invalid input: invalid range for first variable

bifurcation_diagram.mw

thank you for any help

## substitute function in PDEs...

Dear all

I have a PDEs depend on u1(r,z)
I would like to decompose u1 as sum of two function c1*r*U(z)+u(r,z) and  , where c1 is constant,  then i would like to substitute u1 in the pde by   c1*r*U(z)+u(r,z) then obtain the corresponding new equation

subs_function.mw

thank you

## root(x,3) behavior ...

Dear all

I try to understand why maple does ot plot the behavior of x^1/3 for negative real number,

inverse_function_xthree.mw

root(x,3) is function defined verywhere, but why maple plot only this function for x positive

thank you

## pdsolve and iterative gives slight different curve...

Dear all

Strange phenomena...Every thing is well coded.
Using numeric solution pdsolve and  and solution based on iterative solution, gives a slighty different curve..

All matrices are well coded, and everything is okay... But  what happen... to get two different curves at same time.

New_code.mw

Thank you for any help

## display vector from storage rectangular ...

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

## Iterative solution ...

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

## Plot two different funcitons...

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

## unapply to define piecewise function...

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

## Remainder Lagrange in series ...

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

## floating point in a given data ...

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

## sequence of plot in same curve...

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

## Help with the command PlotHistogram...

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.

## print value of matrix defined using loop...

Dear all

I have a matrix defined using loop

How, can I print the value of the  matrix

Print_vaue_G.mw

thank you

## copy paste from maple...

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