I'm trying to lad a comma separated data set and I get an "Invalid minus error".  Neither the filename nor the data set has a minus anywhere in them.  See attached file:  SST Gm Stats.mw  

Download SST_Gm_Stats.mwDownload SST_Gm_Stats.mw

Since I can't upload a .csv file here are its contents:

5248.65,5178.95,5231.01,5161.78,5329.23,5258.52,5311.33,5241.1,5268.2,5198.26,5250.5,5181.03,5348.75,5277.8,5330.79,5260.32,5248.91,5179.21,5231.27,5162.03,5329.49,5258.77,5311.59,5241.35,5268.47,5198.53,5250.77,5181.29,5349.02,5278.06,5331.06,5260.58,5238.16,5168.61,5220.56,5151.47,5318.58,5248.01,5300.72,5230.63,5257.68,5187.88,5240.02,5170.68,5338.06,5267.25,5320.15,5249.81,5238.42,5168.86,5220.82,5151.72,5318.84,5248.27,5300.98,5230.88,5257.95,5188.14,5240.28,5170.94,5338.33,5267.52,5320.41,5250.07,5249.41

Where's the "minus" let alone an invalid one?

John

Let's say I have an mpl file and in this file there are several lines $include<~/~/~.mpl> and in some of those called mpl files, there are also some more include lines. And assume the paths of these files are given relative to a specific folder. Now I guess this specific folder has to be mentioned by modifying includepath. But looking at the help pages related to includepath (here and here) I get this sentence "it can be modified by calling kernelopts(includepath)", but I tired typing things like kernelopts(includepath):="C:\\Homes\\testFolder"; and still I see "" for kernelopts(includepath);. How can I tell Maple to look for the files relative to this location either by typing something at the Maple worksheet before typing read("C:\\Home\\testFolder\\main.mpl); or by adding a line at my main mpl file?

Is there a Maple command to obtain a Taylor series and partial sums of exp(A) where A is a square matrix ?

Hi everyone, i want to draw 3d graphics of fractional solution with given by Mittag Leffler function in cantor sets. I want to see like this graphic. I added maple file. Thanks in advance.

3D_graphic.mw3D_graphic.mw

Dear all

I tried to used insert code edit region, to write many subcodes 

but no return varibales names.

example, x:=3;

when I run the code, I get only the number affected to x, I would like to get 

x:=3

No_return_variable.mw

Thank you 

Dear all

I compute the integral of continuous function but maple return a complexe number. 

continuous_function.mw

A continuous function defined on a closed interval its integral is a number, why maple in my case return a complex number

thank your for your help 

Dear all

When I compute 
int( sin(log(x)),x=0..2) 
I obtain an exact value of the integral 
but one I compute 
int( sin(log(x+1)),x=-1..1) 
I obtain undefined integral

The two integrals are the same, using the change of variable z=x+1

Many thinks

Hello everyone!

I'm not experienced user since I am new to maple, right now I am struggling with partial derivatives.

I want to derivative formula L over diff(x(t), t). Im using dot notation.

Variable diff(x(t), t) is hidden under the name predkosc_x but using this variable name instead of x(t) with a dot also is not working.

What am I doing wrong that I cant derivative over few varaibles?

Also when im trying it this way

I also fail

Hello,

My name is Francisco Navarro. I have a problem when using diff and alias, together with seq or sum.

A very simplified worksheet of what I mean would be

restart

alias(a1 = a1(r), a2 = a2(r), a3 = a3(r))

array1 := [a1, a2, a3]

array2 := [seq(cat(a, i), i = 1 .. 3)]

array1 - array2

This gives [0,0,0] so they are the same thing but, under differentiation, they do not behave the same way (so they are NOT exactly the same object for Maple)

diff(array1, r)

diff(array2, r)

which are different. Any idea of what is wrong with this?

I need to create long arrays with funcions that depend on several values and then differentiate those arrays. But clearly this approach does not work. Thank you for your answer.

Francisco

Why is Maple 2020 in "abcapps.cloud.com" different from Maple 2020 in apps.abc.edu? I am connecting to maple 2020 in two different ways to the school where I work. The schools name is, say, "abc". The first version of Maple 2020 has two arrows at the top. The second arrow is the "upload" arrow and allows me to upload a file from my home computer the my folder at school.
The second version of Maple 2020 has no such arrows. Both versions allow me to get my Maple cloud working for local loading and saving Maple files. How can I upload a Maple file to my Maple cloud from my home computer in the second Maple 2020 version in apps.abc.edu? Or, how can I upload a file to my Maple cloud in any way from my home computer?
By the way, the second Maple 2020 version is coming from Microsoft's Remore Desktop Web Client. It look like it has its own navigation bar at the top.

Thank you!

mapleatha

I have a complicated expression which involves RootOf. How to get rid of and simpliy the equation?

I am looking for an expression for eta(H) not a numerical value.  

eta(H)sheet1.mw  

When a and b are from 0 to 1 it works!! but from -1 to -0.05 not i wonder why?

a1:=1.9:alpha:=0.2:
ode1 := diff( y(x), x$2 ) + x^(-1)* diff( y(x), x )  = 2*a1*(1+x^(2-alpha)/((2-alpha)^2*GAMMA(2-alpha))):
    bc1 := y(0)=subs(r=-0.05,a1/4*(r^2-1)), y(-1)=0:
a:=-1:b:=-0.05:
N := 20:h := (b-a)/N:
X := k -> a+k*h: 
'X'[k] = X(k):
Yp  := k -> (y[k+1]-y[k-1])/2/((1+alpha)*GAMMA(1+alpha)*h^(alpha)):Ypp := k -> (y[k+1]-2*y[k]+y[k-1])/((2-alpha)*GAMMA(2-alpha)*(h^(2-alpha))^2):
for k from 1 to N-1 do
eq[k] := eval( ode1,
                    {x=X(k), y(x)=y[k],
                     diff(y(x),x)=Yp(k),
                     diff(y(x),x$2)=Ypp(k)} ):
    end do:

eq[0] := y[0] = rhs(bc1[1]):
eq[N] := y[N] = rhs(bc1[2]):
    fd_sol1 := fsolve( {seq( eq[k], k=0..N )}, {seq( y[k], k=0..N )} ):
fd_table1 := eval( seq([X(k),y[k]],k=0..N), fd_sol1 ):Matrix([fd_table1]):
infolevel[dsolve] := 3:
#exact_sol1 := combine(dsolve( { ode1, bc1 }, y(x) )):
infolevel[dsolve] := 0:

P1:=plot([fd_table1], x=a..b,color=[black], linestyle = solid, symbolsize=16,axes=boxed);

I defined x(t) and y(t) with units; motion in gravity, motion in y-direction with constant velocity, motion in x-direction as motion with constant acceleration.

x := t -> 10*Unit(('m')/'s'^2)*t^2;

y := t -> 50*Unit(('m')/('s'))*t;

plot([x(t), y(t), t = 0*Unit('s') .. 5*Unit('s')]);

Error, (in plot) invalid terms in product: 0 .. 5*Units:-Unit(s)

It works fine if I remove the units.

Also I can plot graph for x(t) and for y(t) with units, but not graph for [x(t), y(t)]

How to solve the Linear first-order partial differential equation by the Lagrange method. Suppose u and v are dependent variables and x,y,z are independent variables of a partial differential equation of the form:

dx/f(x,y,z)=dy/g(x,y,z)=dz/h(x,y,z)=du/k(x,y,z)=dv/s(x,y,z). I need its solution in the form of u and v . How to find it ?

Hello,

Any form to display

as

?

of course, for 

Thanks in advance,

César Lozada