Advanced Search

Ronan

1401 Reputation

16 Badges

14 years, 30 days
East Grinstead, United Kingdom
Contact Ronan

MaplePrimes Activity


These are questions asked by Ronan

Page print formating problem Maple 2024...

Ronan 1401 Maple 2024
pdf export table
May 15 2025
0 3

I have a print format problem in Maple 2024.  For documents I print out, I use a special layout where all the contents are inside a table. The table is rigged to print on A4 paper. This is useful for my math notes. I havent done this for 18+ months. There appears to be a bug in Maple 2024. Only the first page is printed. Things work ok in Maple 2023. Maybe it is a setting difference or corruption in my install. Could somebody confirm this. Also if you can reproduce the problem could you let me know if it is in Maple 2025. I haven't upgraded yet.

 

2025-05-15_Q_page_print_formating.mw 
2025-05-15_Q_page_print_formating_M_2023.pdf
2025-05-15_Q_page_print_formating_M_2024.pdf

Increase Scrollable Vector default size...

Ronan 1401 Maple 2024
interface vector scrollable
January 01 2025
1 1

I like the scrollable vectors up to a point. They seem to be unnecessarly width restricted. Is there any way to increase this? Could anything be added to the .ini file as the is an entry in there to disable them?

Also, if the command is entered again it is ok

Global and local in module...

Ronan 1401 Maple 2024
programming module global
December 30 2024
2 3

I have a global matrix with a default value set in a module. I also need the inverse of the matrix. Can the module do this?  I don't really want to have to get routines to calculate the inverse every time they are called.

restart

``

TM := module () local invMetric; export foo, bar; global Metric; Metric := Matrix(3, shape = symmetric, [[1, 0, 0], [0, 1, 0], [0, 0, 1]]); invMetric := LinearAlgebra:-MatrixInverse(rtable_eval(Metric, 'inplace')); foo := proc () print('Metric' = Metric) end proc; bar := proc () print('invMetric' = invMetric) end proc end module

_m2278573910560

 (1)

TM:-foo()

Metric = Matrix(%id = 36893490426002737860)

 (2)

TM:-bar()

invMetric = Matrix(%id = 36893490426002738460)

 (3)

Metric := Matrix(3, 3, {(1, 1) = 1, (1, 2) = 0, (1, 3) = 0, (2, 1) = 0, (2, 2) = 1, (2, 3) = 0, (3, 1) = 0, (3, 2) = 0, (3, 3) = -2})

Matrix(%id = 36893490426002715820)

 (4)

TM:-foo()

Metric = Matrix(%id = 36893490426002715820)

 (5)

TM:-bar()

invMetric = Matrix(%id = 36893490426002738460)

 (6)

NULL

Download 2024-12-30_Q_Module_Global_and_Local.mw

Why is this type check not working?...

Ronan 1401 Maple 2024
type
December 29 2024
1 3

I use this type ckect elsewhere inside a package and it works. I can't get it to work in a stand alone procedure.

This was originally provided by @acer (best answer) in this question Experimental format for projective vectors - MaplePrimes

> 

restart
> 

 

> 

 

> 

test:=proc(V::{And('Vector(1)',satisfies( v->type(v[1],'Vector[:-column](3)') ) ),
               And('Vector(1)',satisfies( v->type(v[1],'Vector[:-row](3)') ) )})
print("works",V);
end proc

proc (V::{And('Vector(1)', satisfies(proc (v) options operator, arrow; type(v[1], 'Vector[:-column](3)') end proc)), And('Vector(1)', satisfies(proc (v) options operator, arrow; type(v[1], 'Vector[:-row](3)') end proc))}) print("works", V) end proc

 (1)
> 

v1:=<[<1,3,2>]>;
v2:=<[<a|b|c>]>

Vector(1, {(1) = Vector(3, {(1) = 1, (2) = 3, (3) = 2})})

  

Vector[column](%id = 36893490573309309044)

 (2)
> 

test(v1)

Error, invalid input: test expects its 1st argument, V, to be of type {And('Vector[1]',satisfies(v -> type(v[1],'Vector[:-column](3)'))), And('Vector[1]',satisfies(v -> type(v[1],'Vector[:-row](3)')))}, but received Vector(1, [Vector(3, [1,3,2])])

  
> 

test(v2)

Error, invalid input: test expects its 1st argument, V, to be of type {And('Vector[1]',satisfies(v -> type(v[1],'Vector[:-column](3)'))), And('Vector[1]',satisfies(v -> type(v[1],'Vector[:-row](3)')))}, but received Vector(1, [Vector[row](3, [a,b,c])])

  
> 

whattype(v1)

Vector[column]

 (3)
> 

whattype(v1[1])

Vector[column]

 (4)
> 

whattype(v2)

Vector[column]

 (5)
> 

whattype(v2[1])

Vector[row]

 (6)
 

 

Download 2024-12-29_Q_Type_checking_not_working.mw

Convert Vector to diagonal Matrix...

Ronan 1401 Maple 2024
matrix vector
December 26 2024
1 0

I am looking for a more eligent way to convert a Vector to a Diagonal Matrix.

> 

restart
> 

 

> 

 

> 

with(LinearAlgebra):
> 

 

> 

V:=Vector[column](3, [0.5863730366, 0.1171249270, 0.2965020364])

Vector(3, {(1) = .5863730366, (2) = .1171249270, (3) = .2965020364})

 (1)
> 

Vm:=Matrix(3,[[V[1],0,0],[0,V[2],0],[0,0,V[3]]])

Matrix(3, 3, {(1, 1) = .5863730366, (1, 2) = 0, (1, 3) = 0, (2, 1) = 0, (2, 2) = .1171249270, (2, 3) = 0, (3, 1) = 0, (3, 2) = 0, (3, 3) = .2965020364})

 (2)
> 

Vm1:=Matrix(3,3):
> 

for i to 3 do
Vm1[i,i]:=V[i];
end do:
> 

Vm1

Matrix(3, 3, {(1, 1) = .5863730366, (1, 2) = 0, (1, 3) = 0, (2, 1) = 0, (2, 2) = .1171249270, (2, 3) = 0, (3, 1) = 0, (3, 2) = 0, (3, 3) = .2965020364})

 (3)
 

 

Download 2024-12-26_Q_Diagonal_Matrix_from_Vector.mw

1 2 3 4 5 6 7 Last Page 2 of 36