Anthrazit

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6 years, 52 days

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These are questions asked by Anthrazit

Is there any setting that controls the extent of a plot?

Left hand plot has defined extent of the plot, while the plot on the right hand side has not. When panning the graphics on the right side the plot is clipped.

Any idea how to make Maple to use the whole extent of the plot component as a boundary?

Download plotpoint2.mw

What is the correct way to plot objects which have been created by the geometry library.

e.g. circle, point, line, e.g.

restart; with(geometry)

point(B, 2, 0)

B

(1)

form(B)

point2d

(2)

coordinates(B)

[2, 0]

(3)

with(plots)

display(pointplot(B))

Error, (in plots:-pointplot) points are not in the correct format

 

NULL

Download plotpoint.mw

Is it possible to use the ~ when using Matrix multiplications, where the second part of the operand are list elements?

The first part of the matrix multiplication remains unchanged, while the second one should be each element of the list.

The result should be a list of vectors / matrices again.

with(Units:-Simple)

alpha := 20*Unit('arcdeg')

20*Units:-Unit(arcdeg)

(1)

TransMatrix := Matrix([[cos(alpha), sin(alpha)], [-sin(alpha), cos(alpha)]])

Matrix(%id = 36893490153509525972)

(2)

pt := Vector(2, {(1) = -25.0, (2) = 0.})

Vector[column](%id = 36893490153504789076)

(3)

ptlist := [Vector(2, {(1) = -25.0, (2) = 0.}), Vector(2, {(1) = 25.0, (2) = 0.})]

[Vector[column](%id = 36893490153504761724), Vector[column](%id = 36893490153504761844)]

(4)

pt_trans := evalf(TransMatrix.pt)

Vector[column](%id = 36893490153514236012)

(5)

pl_translist := evalf(TransMatrix.ptlist)

Matrix(%id = 36893490153509525972).[Vector[column](%id = 36893490153504761724), Vector[column](%id = 36893490153504761844)]

(6)

TransMatrix.ptlist

Error, number of dimensions must be the same for all container objects in an elementwise operation

 

NULL

Download MatrixMultiplicate.mw

Is it correct that element wise operators just work on the first element, and not in nested elements?

Do I need to manually go through the nested lists, or are there any other tricks to simplify this operation?

fasteners := [Vector(2, {(1) = -25.0*Units:-Unit(mm), (2) = 0.}), Vector(2, {(1) = 25.0*Units:-Unit(mm), (2) = 0.})]

[Vector[column](%id = 36893490765018711092), Vector[column](%id = 36893490765018711212)]

(1)

`~`[convert](fasteners, unit_free)

[Vector[column](%id = 36893490764941411500), Vector[column](%id = 36893490764941411620)]

(2)

x := Vector(2, {(1) = -25.0*Units:-Unit(mm), (2) = 0.})

Vector[column](%id = 36893490765009212828)

(3)

`~`[convert](x, unit_free)

Vector[column](%id = 36893490764944766844)

(4)

NULL

Download elementwise.mw

Just wonder if there are any known issues when using dots in Maple code attachment names?

Only issue so far that I can see is that error messages are split a bit strange.

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