mmcdara

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These are questions asked by mmcdara

How to use the Liebniz notation in a com...

Asked: mmcdara 7891 Product: Maple 2015

January 04 2020

0 4

I would like to use the Liebniz notation that someone from the technical support posted here
Writing Derivatives at a Point Using Leibniz Notation
to display a formula that is not just a partial derivative but a more complex expression invoking partial derivatives.
Typically an expression like this one:

2*(Diff(f(mu__1, mu__2), mu__1))^2*lambda__1^2-(Diff(f(mu__1, mu__2), mu__1))^2*mu__1^2+2*(Diff(f(mu__1, mu__2), mu__2))^2*lambda__2^2-(Diff(f(mu__1, mu__2), mu__2))^2*mu__2^2+2*(Diff(f(mu__1, mu__2), mu__1))*(Diff(f(mu__1, mu__2), mu__2))*lambda__1*lambda__2-2*(Diff(f(mu__1, mu__2), mu__1))*mu__1*(Diff(f(mu__1, mu__2), mu__2))*mu__2

Could anyone help me to do this?
Thanks in advance

(PS: I'm still using Maple 2015.2)

How to follow an hyperlink ?...

Asked: mmcdara 7891 Product: Maple 2015

December 24 2019

1 3

Hi,

In help page DocumentTools:-Layout:-Font, there is an example which shows how to inser a hyperlink in a Layout.

F := Font( "Some text", size=16, color=blue, style=:-Hyperlink ):
InsertContent(Worksheet(Group(Input(Textfield( F ))))):

When this id done, how can we activate this hyperlink ?
5I'm presently working with Maple 2015.2 under Mac OS Mojave)

Thanks in advance

Why don't the sliders work?...

Asked: mmcdara 7891 Product: Maple 2015

December 16 2019

1 7

Hi,

Moving the sliders clean the plot.
Does any one can show me how to fix this (PS: this piece of code is a part of a procedure whose arguments are RV and SliderRanges and I need this unusual coding to make the procedure generic ... at least I guess so)

Thanks in advance

restart:

>	interface(version);

(1)

>	with(Statistics):

>	RV := RandomVariable(Normal(a, b)): law := [attributes(RV)][3]: pars := law:-Parameters;

(2)

>	SliderRanges := [-5.0..5.0, 1.0..3.0]: [seq(pars[k]=SliderRanges[k], k=1..numelems(pars))]

(3)

>	f := PDF(RV, x); # Explore(plot(f, x=-3..3), parameters=[seq(pars[k]=SliderRanges[k], k=1..numelems(pars))]);

(1/2)*2^(1/2)*exp(-(1/2)*(x-a)^2/b^2)/(Pi^(1/2)*b)

(4)

Download Explore_Problem.mw

Why doesn't dsolve[events] return the g...

Asked: mmcdara 7891 Product: Maple 2015

December 12 2019

1 2

Hi,

Why extracting the features of the events doesn't return the good results when executed within a loop (see the pink test) ?

Thanks in advance.

PS: please, spare me replies of the type "you can solve this equation formally"

restart;

>	interface(version);

(1)

>	sys := { diff(x(t), t) = 1, x(0) = 0 }: evs := [ [x(t)-0.1, none], [x(t)-0.3, none], [x(t)-0.5, none] ]: sol := dsolve(sys, numeric, events=evs): plots:-odeplot(sol, [t, x(t)], t=0..0.5, gridlines=true);

>	# times that fired the events sol(1): # initialization sol(eventfired=[1]); sol(eventfired=[2]); sol(eventfired=[3]);

(2)

>	# Same times computed within a loop for i from 1 to 3 do te := op(sol(eventfired=[i])); end do;

(3)

# Values of x(t) computed within a loop
#
# Why are calues for events 2 and 3 wrong ?
for i from 1 to 3 do
  te := op(sol(eventfired=[i]));
# xe := sol(te);             # this doesn't return the correct result,
# xe := subs(sol(te), x(t)); # this doesn't work neither
  xe := eval(x(t), sol(te)); # this doesn't work neither
end do;

(4)

Download Incomprehensible.mw

Relabelling vertices of a graph sometime...

Asked: mmcdara 7891 Product: Maple 2019

December 07 2019

0 2

Hi,

This is a question more or less related to this one Is it possible to define variables with unusual na... but I think it's better to open a new thread. If some think otherwise, please feel free to displace it to the link above.

I want to relabel the vertices of a graph by using special characters.
It happens that this works perfectly if I do not impose the style of the drawing but that it doesn't if I set, for instance, spring=style.
In the attached file you will see that the subsitution of the old vertex names by the new ones doesn't work if apply it directly on the many operators of the PLOT command contains.

Is this behaviour fixed in more recent versions of Maple or it's still present?

Strange-Behaviour-with-SpringStyle.mw