Unanswered Questions

This page lists MaplePrimes questions that have not yet received an answer

Dear researchers,

Greetings, I have unable to apply Nonlinear Least-Squares Methods  for an SIR parameter estimation. May you share me your Maple code model as a  sample parameter estimation ?

Thank you in advance!!!

Dear people,

I have resolved the primitives of the equation of the odometric model.

I have plotted them to the Maple interface and I was thinking that it can have been done by the solver.

Nevertheless it has not been possible to do it.

Can you tell me if a package of Maple can resolve it ?

Best regards,

Edern Ollivier.

Hi,

May  I please get a Maple code to solve the below Perturbation Iteration Solutions for Volterra Integral Equations? 

I shall be very much grateful if I can get the Maple Code.

And possible plotting

Thanks

What does the following message imply?

"Error, (in Engine:-Dispatch) invalid boolean expression: 0"

I was introduced to DataFrame by some kind people here the other day and I thought I understood.  Then I tried this

M := DataFrame(<0,0,0;0,1,a;0,a,1>,rows=[0,1,a],columns=[0,1,a])

Now M[1, a] returns 0.  What's going on here? 

Hello guys,

I created a palette, but when I click on an entry, the following occurs:

If the entry line, where the mouse cursor is, is empty, insertion takes place on this line.
If the input line has any expression and the mouse cursor is to the left of the expression, insertion takes place on the line above.

If the input line has any expression and the mouse cursor is to the right of the expression, insertion takes place on the line below.

Does anyone know how to fix this?

Sincerely,

Oliveira

Before answering, Please Note,

Do not suggest I use

maple <filename.maple>

The conversion in maple to convert an ".mw" file in xmaple for a text file to be executed with

maple command

does not work and I therefore need a way to execute and operate a ".mw" workksheet straight in terminal without the need for X.

This is a Linux based question.

I have batches of about 50 maple processes that I run in parallel accross several 32-core and 64-core servers.
I am not using the built in spawning process commands, but rather run a new instance of maple.

Some of these batches need to be developed in xmaple it is just not feasable to do it in a text editor to be executed by "maple"

QUESTION:

Is there any switches in maple that I can run a ".mw" maple file as a terminal operation without starting the interface ?

e.g. how can I run

xmaple <mystery switches> maplefile.mw   such that the interface doesnt load but the file is executed completely in terminal without the need for X.

Thanks

So I have a problem when copying multiple output from Maple to Word. I am using a simple example here. 

When I copy each part of the output as an image SEPERATELY, it comes out much cleaner than if I highlight everything together and then copy. Is there a reason this is the case and is there a way to fix this problem?

Here is the Maple Code:

with(plottools);
with(plots);
ttt1 := textplot([0, 1, "3  +  5  =  __", color = "black", font = ["Arial", "bold", 120]]);
display(ttt1, size = [1000, 200], axes = none);
ttt1 := textplot([0, 1, "1  +  3  =  __", color = "black", font = ["Arial", "bold", 120]]);
display(ttt1, size = [1000, 200], axes = none);

I also uploaded the Maple Worksheet

Here is the output:

There are TWO imges in the output in this example. I tried copying both together and pasting them, and then I tried copying them individually. The output is very different in quality.

The one copied alot is much cleaner once copied and pasted in Word. Does anyone why this is happening? I don't want to have to copy images individally for obvoius reasons. I know this example is only two images but what if there was alot more, etc.

Thank you

NULL

with(plottools); with(plots); ttt1 := textplot([0, 1, "3  +  5  =  __", color = "black", font = ["Arial", "bold", 120]]); display(ttt1, size = [1000, 200], axes = none); ttt1 := textplot([0, 1, "1  +  3  =  __", color = "black", font = ["Arial", "bold", 120]]); display(ttt1, size = [1000, 200], axes = none)

 

 

NULL

Download Copy_Images.mw

If I draw a new molecule in chemdraw and save can we input it in someway and get the 3D coordinates , 2D , and many other details which we can get from the structure.

As I am new and I am planning to buy this toolbox please kind help

Hello,

    I am manually re-creating the TS diagram for phase plot of fluid=air for use in a report as a pretty plot.   The TemperatureEntropyChart function is colored in grayscale.  I really need to change to colorized for additional data being added.

   The code to generate the various isobars color gradient is shadebetween two curves.   

    Using the code method to plot leaves white gaps in the discontinutiy of the plot curves returned from the Property function at the liquid and vapor lines.   I have manually connected the horizontal "under the dome" in a matrix of X,Y for each of two isobar curves.

   However, the shadebetween doesn't seem to like the two X,Y matrices for the curves as inputs to shadebetween.

    So,...   Q:   1.)  Can the color be changed using the TempertureEntropyChart function,..or
                      2.)  Can matrices of unequal X,Y values (scatterplot type data sets) be used for the curves in shadebetween command?  The help infers the Y (v, of (u,v))  values need to match.

Thanks,
Bill

Ref:    worksheet contained at:  https://www.mapleprimes.com/maplesoftblog/203462-Computing-With-Thermophysical-Data

Hello guys
Could someone help me create a simple palette to contain, for example, three functions that I use constantly?

           conve1(a), conve2(a) and conve3(a).

I tried through the help documentation, but I couldn't.

Sincerely,
Oliveira

I was having this problem with Maple Flow 2021, and just purchased Maple Flow 2022 but am still having this problem.

I define a variable, using := and an equation (that itself uses other variables that have been assigned a numeric value) and end it with an = and it is clear that the variable has a numeric value successfully assigned to it.

Lower down in the document, I use this variable, but it isn't recognized as having any numeric value or having been previously definied at all and when evaluated it stays in symbolic form.

I have tried deleting variables, renaming them without subscripts, retyping equations, etc. and nothing seems to work. Oddly most of the variables work, but some won't even though there doesn't seem to be anything special about them.

Any thoughts or advice would be greatly appreciated.

I have just installed the Google Maps package but when I run the commands I only get empty results and some errors

Any thoughts of what can be wrong. Have latest Montery OSX 

/Anders

Mathematica's Dimensions returns a list of the allowed levels, which has been implemented in Maple as . But 

MmaTranslator:-Mma:-Dimensions(<<1 | 2>, <1 | 0>>);

returns [6], and 

MmaTranslator:-Mma:-Dimensions([[1, 2], [1, 0]]);

returns [2, 2, 4]. What happened here?

It should be [2, 2].

restart;

MmaTranslator:-Mma:-Dimensions(linalg[matrix]([[1, 2], [1, 0]]));

[0]

(1)

MmaTranslator:-Mma:-Dimensions(< 1 , 2 ; 1 , 0 >);

[6]

(2)

MmaTranslator:-Mma:-Dimensions(convert(`{{1, 2}, {1, 0}}`, FromMma));

[2, 2, 4]

(3)

MmaTranslator:-FromMma(`Dimensions[{{1, 2}, {1, 0}}]`, evaluate);

[2, 2]

(4)

NULL

Download Mma[Dimensions].mws

Hi Everyone,

I intend to find the invariants of a 2nd-order Tensor using the representation of the rotational group as an Infinitesimal generator. However, maple does not seem to find the correct invariants $\tr \mathbf{a}$, $\tr \mathbf{a}^2$, $\tr \mathbf{a}^3$. Maple only returns an empty set. I can't seem to figure out why that is the case.

Here is my code

NULL

restart

with(PDETools)

assume(r >= 0)

interface(showassumed = 0)

X_z2 := (-a__21-a__12)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__11))+(a__11-a__22)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__12))-a__23*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__13))+(a__11-a__22)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__21))+(a__12+a__21)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__22))+a__13*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__23))-a__32*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__31))+a__31*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__32)) = 0

(-a__21-a__12)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__11))+(a__11-a__22)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__12))-a__23*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__13))+(a__11-a__22)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__21))+(a__12+a__21)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__22))+a__13*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__23))-a__32*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__31))+a__31*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__32)) = 0

(1)

X_y2 := (-a__31-a__13)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__11))-a__32*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__12))+(a__11-a__33)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__13))-a__23*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__21))+a__21*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__23))+(a__11-a__33)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__31))+a__12*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__32))+(a__13+a__31)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__33)) = 0

(-a__31-a__13)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__11))-a__32*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__12))+(a__11-a__33)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__13))-a__23*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__21))+a__21*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__23))+(a__11-a__33)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__31))+a__12*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__32))+(a__13+a__31)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__33)) = 0

(2)

X_x2 := -a__13*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__12))+a__12*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__13))-a__31*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__21))+(-a__32-a__23)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__22))+(a__22-a__33)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__23))+a__21*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__31))+(a__22-a__33)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__32))+(a__23+a__32)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__33)) = 0

-a__13*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__12))+a__12*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__13))-a__31*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__21))+(-a__32-a__23)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__22))+(a__22-a__33)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__23))+a__21*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__31))+(a__22-a__33)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__32))+(a__23+a__32)*(diff(f_1(x, y, z, a__11, a__12, a__13, a__21, a__22, a__23, a__31, a__32, a__33), a__33)) = 0

(3)

sys := [X_z2, X_y2, X_x2]

sol := pdsolve(sys)

(4)

NULL

Download SO(3)_spherical_2.mw

Any input would be appreciated!

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