Hello,

I have a problem with the type of the pvalue in the Shapiro-Wilks test.

My program :

pv := ShapiroWilkWTest(Mat1, level = 0.05);
whattype(pv);  list  
eval(pv[2]);  "pvalue = 0.25..."  This result is an element of a list but not a real number

I would like to obtain the real value of pvalue in order to make a calulous with it.

I have tried as an example in Maple :

pv := ShapiroWilkWTest(Mat1, level = 0.05,output=pvalue); but it doesn't run.

May someone help me? Thank you very much
 

I solved the differential equation using 'dsolve' and Maple returns it with fiver possible solutions. How can we get the single possible solution for w(x) if we assume c, g (constants) are positive? Also, can we convert JacobiSN() to a simple trigonometric or algebraic function?

Download solve.mw

Hello,

I have a problem to export datas in an excel file.

I have no problem to read some datas in this file, but when i want to write a matrix 1x1 in a cell, there is no error message but nothing happen in the file.

Here is my program :

with(ExcelTools);

kernelopts(datadir);

File1 := FileTools:-JoinPath(["Excel", "test.xlsx"], base = datadir);
Mat1 := Import(File1, "Somme", "G2:G8"); # it runs very well
R := array(1 .. 1, 1 .. 1, [[564]]);
Export(R, "test.xlsx", "Somme", "G1"); # nothing happens in the file

Thank you very much for help

Hello everyone, 

I have a function C that depends on Omega and mu_s values. I am trying to get a 3d plot of C for certain Omega and mu_s values. First, I got the graph for Omega=0.1..10, mu_s=0.1..0.6 (red plot). Then, for Omega=0.1..50, mu_s=0.1..0.6 (green plot). In the second case, I expected the first part of the graph to be the same as before, but with values of C for Omega till 50. However, the first part of the plot changes as well. I do not understand why. Can someone help me with it, please?

I would really appreciate it! 

Thank you!!

mint gives messages such as

 These local variables were assigned a value, but otherwise unused:  i

even though it does say what proc this is in, it does not give the line number where such problem is at.

So if a proc is long, say 100 or 200 lines, it is very hard to find the location of such things visually all the time.  Searching for "i" is not too useful.

Tried different options but there are no line numbers given for these messages.

"C:\Program Files\Maple 2022\bin.X86_64_WINDOWS\mint.exe" -i 2  foo.mpl

Using  -i 4 gives much more information, but no line numbers.

Are there other things to try? I think mint should be improved and list line number for each warning and message such as also These local variables were assigned a value, but otherwise unused: 

It should give lines numbers where this happened to make it easier to locate in the editor.

Maple 2022.1 windows 10.

Assalomu alaykum. 

I couldn't solve this integral equation but other online calculator done it. How to calculate in Maple. I use Maple 2021.

L[1, 0] := t + Pi*t/2 + (4*t^(3/2))/3;
L[2, 0] := t^(1/2) + Pi*t/4;
L := int((L[1, 0] + L[2, 0])/(x - t)^(1/2), t = 0 .. x);
 

Is it possible to integrate eq (1) in such a way that the final result will be of 1st order differential equation? 

Download inttegration.mw

Hello everybody,

Something totaly unexpected came by, and i was wondering: how could this be? Im putting what would be the same input in, and yet, its not giving me the results i was expecting for the input i had itterated. 

While one solution would be really cumbersome and slow, it tried to do it faster. It worked before, but now i hit a wall. No clue why, but it seems to be so. 

Here is the example:

 

Thank you!

Greetings,

The Function

Download Mapleprimes_Question_Book_2_Paragraph_4.2.2.mw

How can one ask Maple 2022 to give the non-trivial solution to this differential equation 

V’(t)=-2*V(t)^(2/3) with V(5)=0 ?? 

Have tried dsolve({V’(t)=-2*V(t)^(2/3),V(5)=0}). But that only gives me the trivial solution V(t)=0.

The wikipedia website below contains a general description of Doyle spirals but not the full mathematics of their construction.  

https://en.wikipedia.org/wiki/Doyle_spiral

The website below apparently contains the html coding for an animated display of Doyle spirals, but I am not familiar with this coding language.

https://bl.ocks.org/robinhouston/6096950

Can anyone direct me to 1) the complete mathematics describing the construction of a Doyle spiral and/or

                                        2) a Maple worksheet which codes for the display of a Doyle spiral?

Do you think the following messages  by mint should have been the same? this is just some made up example with no purpose other than to show the messages.

foo:=proc(x)
local z,a:=1,la;
   patmatch(x,a*x,'la');   
   map(z->assign(z),la);
end proc;

boo:=proc(y,x)
local Z,RHS;   
   RHS:=y(x);
   subs(y(x)=Z,RHS);
end proc;

Looking at the above, foo() has z used but never assigned a value, right?  And in boo(), Z is used but never assigned a value.

but mint gives slighlty different message

"C:\Program Files\Maple 2022\bin.X86_64_WINDOWS\mint.exe" -i 2  A.mpl

Procedure foo( x ) on lines 2 to 6
  These local variables were never used:  z

Procedure boo( y, x ) on lines 8 to 12
  These local variables were used but never assigned a value:  Z

Should not these two messages have been the same?

Recent documents shows the last 10 files you've opened.  Any way to increase that to something like 20 or 50?

Dear everyone,

Ive been looking at this problem ive got, but i cant find out what would make it work. I can put numbers in a matrix, i can solve 3 unknowns with 3 equations. But now there is a variable, and the variable causes the solution to give either: 1 solution, no solution, or more than one solution. 

I can "brush the matrix" as they say it in Dutch, but im learning Maple so it can go a lot faster than manual labor. So is there a way to do it with Maple? 

Figure 4.1 gives from left to right: 1 solution, no solution, and an indefinite amount of solutions.

Questions: For what value of p, a. gives 1 solution? b. gives no solution? c. gives more than 1 solution?

Now i got Maple to tell me how much p x1, x2, and x3 was, but its not bringing me anywhere to where i can get to a solution. 

A manual method is given in this example. Manual is way way to slow for what i need to achieve, ive got some large big books with mechanics, dynamics, statics, fluid mechanics, concrete calcutions, chemistry etc. waiting for me. I can never achieve that manually in the same time as i could do it with maple. :S 

Thank you!

Greetings,

The Function

Download Mapleprimes_Question_Book_2_Paragraph_4.2_Example_15.mw

Hello.

If I input 'floor(5.5)' in Maple 2018 I get the expected \lfloor 5.5 \rfloor thing.  I mean, with the special brackets typical for the floor notation.

However, if I try to place the floor notation onto a plot I get literally the string "floor(5.5)".  As in

  textplot([2, 2, 'floor(5.5)'])

The ' ' quotation marks ensure the delayed evaluation but I do not get the floor parentheses! 

Interestingly,

  textplot([2, 2, 'sqrt(5.5)'])

outputs the radical notation as expected.

How come I cannot produce a plot with the floor brackets notation in it?

Thanks

Minko