## TextArea0 output in formatted form - Request...

I want to obtain a report in a particular table format in TextArea component.REPORT (TextArea)area and ComboBox are not visble here.

Can any one help me? TextBox_Format_Output_Request.mw

I have done it using the print format directly with variable values. This is fine for me.

 Maple:        Maple:     Map   9.9876:   9.0808       8.1

I have done it differently defining a variable for the print format. This is fine for me and required as standard.

 Maple:        Maple:     Map   9.9876:   9.0808       8.1

Now I want these two lines as per format print  inside textarea0 named REPORT.

I attach the doc for clarity of my odoubt. I have made all the required compoennets commands except for the formatting of printf formaat. Thanks for help.

Ramakrishnan V

## interpolation or table of the pair values of the g...

Hi

trying to make table of points of the pair(lambda1,lambda2) to get the approximate function this technique  is called interpolation

contourplot(4*lambda2*result^2/(Pi*(lambda2+1)^2)-lambda1,lambda1=0..1,lambda2=0..1,contours=[0],axes=boxed,title=tit,titlefont=[SYMBOL,16],thickness=1,color=black,font=[1,1,18],tickmarks=[2, 4],linestyle=1,view=[0.002..1,0.002..1]);

any one knows how to find it

## conditional if ...

Hello everyone,

I need your helps .I have this code to solve equation numerically with random coefficients, but sometimes the solution find a singularity, for that I create conditional if to avoid it , but its does not work.

Thank you a lot.

 >
 >

 >

 >

 > amin:=0.1;amax:=0.2;

 > bmin:=15;bmax:=24;

 >

## 4 linear factors...

Hi all,

I am hoping to use Maple to develop a list of 4 distinct linear factors with the following conditions...

1)  each individual factor does not have a common integer factor...  ie...  3x+9 is not permitted

2)  the coefficients in each individual factor has an integer between (-9 and 9) without the possibility of zero...  ie x + 0 and 0*x +3 are not permitted

3) each seperate factor is prime to one-another.  ie.  factor1=3x+4  and factor2=-3x-4 is not permitted.

I was hoping to use something short and sweet, using a sequence (if possible), but continue to run into problems.

Any help out there would be fantastic

Thanks,

Mark

## strange result from algsubs...

Would someone be able to explain this strange output?

restart;
sol:=int(1/(x*sin(x)),x);
algsubs(x=t,sol);


How did Maple manage to obtain this? I tried tracing but it did not help me figure it out.  If it is of any help:

int(1/sin(x),x);

It seems algsubs got confused somewhere?

Maple 2017.2, windows.

## How to find alpha,beta,mu,nu?...

with(PDEtools); declare(u(x, y, z, t), U(X, Y, Z, T)); interface(showassumed = 0); assume(a > 0, p > 0); W := diff_table(u(x, y, z, t)); E := 6*W[]*W[x]+W[t]+W[x, y, z] = 0; InvE := proc (PDE) local Eq1, Eq2, Eq3, Eq4, tr1, tr2, tr3, tr4, term1, term2, term3, term4, sys1; tr1 := {t = T/a^beta, x = X/a^alpha, y = Y/a^mu, z = Z/a^nu, u(x, y, z, t) = U(X, Y, Z, T)/a^zeta}; tr2 := eval(tr1, zeta = 1); Eq1 := combine(dchange(tr2, PDE, [X, Y, Z, T, U])); Eq2 := map(lhs, PDE = Eq1); term1 := select(has, select(has, select(has, rhs(Eq2), a), beta), a); term2 := expand(rhs(Eq2)/term1); term3 := select(has, select(has, term2, a), a); sys1 := {select(has, op(1, term3), a) = 1, select(has, op(2, term3), a) = 1}; tr3 := solve(sys1, {alpha, beta, mu, nu}); tr4 := subs(tr3, tr2); print(tr3, tr4); Eq3 := dchange(tr4, PDE, [X, Y, Z, T, U]); term4 := select(has, op(1, lhs(Eq3)), a); Eq4 := expand(Eq3/term4); PDE = simplify(Eq4) end proc; InvE(E)

## figure draw problem why unable to evaluate the fun...

> restart;
> u := c-6*mu*(1+lambda*sqrt(-mu)*coth(A+sqrt(-mu)*(x+y+mu*t)))/((a+b)*sqrt(-mu)*coth(A+sqrt(-mu)*(x+y+mu*t)))+6*mu*sqrt(sigma*(1-coth(A+sqrt(-mu)*(x+y+mu*t))^2))/(sqrt(sigma)*(a+b)*sqrt(-mu)*coth(A+sqrt(-mu)*(x+y+mu*t)));
/                (1/2)     /         (1/2)               \\
6 mu \1 + lambda (-mu)      coth\A + (-mu)      (x + y + mu t)//
c - ----------------------------------------------------------------
(1/2)     /         (1/2)               \
(a + b) (-mu)      coth\A + (-mu)      (x + y + mu t)/

(1/2)
/      /                                       2\\
|      |        /         (1/2)               \ ||
6 mu \sigma \1 - coth\A + (-mu)      (x + y + mu t)/ //
+ -----------------------------------------------------------------
(1/2)              (1/2)     /         (1/2)               \
sigma      (a + b) (-mu)      coth\A + (-mu)      (x + y + mu t)/
> c := 1;
1
> mu := -1.5;
1.5
> lambda := 1.5;
1.5
> a := 1;
1
> b := 1;
1
> A := .5;
0.5
> y := 0;
0
> plot3d([abs(u)], x = -10 .. 3, t = -10 .. 3);
Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct

## what is the reason unable to draw figure explain ...

> restart;
> u := a[0]-12*sqrt(mu)*(1+lambda*sqrt(mu)*tan(A-sqrt(mu)*(x+y+4*mu*t)))/((a+b)*tan(A-sqrt(mu)*(x+y+4*mu*t)));
(1/2) /             (1/2)    /      (1/2)                 \\
12 mu      \1 + lambda mu      tan\A - mu      (x + y + 4 mu t)//
a[0] - -----------------------------------------------------------------
/      (1/2)                 \
(a + b) tan\A - mu      (x + y + 4 mu t)/
> a[0] := 2;
2
> mu := 1.5;
1.5
> lambda := 2;
2
> a := .5;
0.5
> b := .5;
0.5
> A := 1.5;
1.5
> y := 0;
0
> plot3d([abs(u)], x = -3 .. 3, t = -3 .. 3);
Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct

i have a problem with readstat, when using proc , the readstat command returns some errors and do not complete the reading procedure, but without using proc, it is ok, what should i do ? is this a bug?

## The patch package project

Maple

Was just pondering this idea and posted this in the post topic for discussion.

Each Maple finished version of Maple may still have certain bugs that will not be updated for that version, so I am suggesting (I think anyone could implement it) that if there is a workaround, one could wrap it up in something I would call a patch package updateable by us users we could update here on mapleprimes.  It would be good for people who haven't upgraded or can't upgrade due to costs etc...

For example, there was recent issue with pdsolve that was fixed quite quickly in the seperate updateable Physics package.  Things could be done similarily that might work with other workarounds using this patch package idea.

If anyone thinks this is good or even viable idea then lets implement it.  I envisioned it with just this one rule to follow - the name of the patch package would reflect the version we are patching (ie. with(patch12) or with(patch2016) for Maple 12 and Maple 2016 respectively etc...)  We could make these patch packages available in this post or start another.

As I said, I'm just throwing the idea out there.  Thoughts?

## How to locate maximum value on a three dimensional...

Hello,

I am plotting a three dimensional plot within a range in maple. There are two variables x and y. Third dimension is the objective function ( Z).

On this three dimensional plot, I want to show the point ( preferably by some colour, say red) which have maximum objective value. How it can be done in maple?

Also, Can I show the maximum objective function value (Z) and its coordinates (x,y) on the graph.

Thanks and regard,

Nilesh

## How can I increase the window/viewport/border arou...

I want ot add an annotation to a plot using the drawing facility. Then I export the plot. My problem is that I cannot increase the viewport of the plot without also increasing the size of the plot. For example the code:

plot(20-(20*(1/10))*P, P = 0 .. 10, labels = ["Q", "P"], scaling = constrained, tickmarks = [5, 3], size = [600, 400])

produces this plot:

I have constrained the plot and used the size option which together have the side effect of giving me more horizontal space. But this is a wretched hack! I want to size the viewport of the plot so I can write on it.

## Square root and branch cut...

For sqrt(-1), Maple returns I. Why not -I? I understand why in general Maple does not, and should not, return both signs, because sqrt is defined with a branch cut - specifically out along the negative real axis:

FunctionAdvisor(branch_cuts,sqrt(s));

But as +I and -I lie symmetrically around the branch cut, I do not understand why +I should be chosen in favor of -I. Neither the square of +I or of -I crosses the branch cut, which is,  I guess, the standard way to select a unique value, although both squares end up on the branch cut itself - the latter fact leading to the following more general consideration:

I do not understand why the square root of any negative real number (the above being just a specific case) should at all be assigned any meaning when lying as they do on the branch cut itself. I think it would be more sensible if Maple raised an error, telling you that the branch cut needs to be changed/moved if any value is to be assigned. Which leads me to the following question:

Can the branch cut of the logarithm, and thus of sqrt as well, be changed/moved? I would like it to lie out along the negative imaginary axis.

Update I: Concerning -1 lying on the branch cut itself, there is no issue, see my 'ups' in the reply to the answer by John May. But redefining the branch cut is still relevant.

Update II: Perhaps the issue raised is not all that trivial, after all. At least, it is "a subject of papers and debate", as Alejandro Jakubi formulated it in an email to me, pointing me to the article 'Function evaluation on branch cuts', by Rich and Jeffrey.