Christopher2222

MaplePrimes Activity


These are answers submitted by Christopher2222

Just realized an add-on for firefox, FireShot.  So the way I see it, is to save the page as an image and then insert image from file. 

In the future perhaps Maple could provide an HTTP command to display a webpage at a certain address within Maple?

You could try a couple of ways

1/ Alter the data going into the plot on the fly with map

a:=[[2,4],[5,6],[2,8],[13,65]]:

with(plots):

pointplot(map(a-> [a[1], -a[2]], a))

2/ transform the plot with plottools

coordchange:=plottools:-transform((x,y)->[x,-y]):

coordchange(pointplot(a))

 

I posted to this effect already, but I got no responses or no one cared, I don't know.

http://www.mapleprimes.com/posts/207477-Can-Not-Copy-Paste-In-Mapleprimes-

It happened I believe Friday or Saturday during an update to mapleprimes - there was a period of time when the site was inaccessible at which time I believe an update was being applied.

Maplesoft should reply to these effects.  As a workaround I copy paste in Paint and copy from there.

Here's a start ...

Quantum mechanics using maple  http://www.springer.com/la/book/9783642795404

Quantum mechanics using computer Algebra http://www.worldscientific.com/worldscibooks/10.1142/7751

Maple package for computation in Lie algebras http://people.math.carleton.ca/~billig/maple/

Mathematics of CLIFFORD - A Maple package for Clifford and Grassmann algebras https://arxiv.org/abs/math-ph/0212031

 

Maybe me but more math than maple.

So a square surface area (a x a) of area a2 projected onto some cylindrical surface of radius R.  So the length of one line in the square, a, projected on the surface of the cylinder is s=R*theta*2*Pi/360

Using the cosine formula to find theta in terms of R and a gives

theta=cos-1(1 - a2 / (2*R2) )

and s*a will be the area on the surface of the cylinder.  So the area of a square sides a projected onto the surface of a cylinder radius R is   R * theta * 2*Pi/360  *a

 

 

another way

has(ifactor(390),7)
                              false

 

As a start, you mean something like this? 

restart``

with(stats):``

with(stats[statplots]):

a := [30, 30.5, 31, 31.5, 32, 32.5, 32.6, 33, 33.1, 33.3, 33.6, 34, 35, 36]:

h := histogram(a):

with(Statistics):

m := Statistics:-Mean(a):

s := Statistics:-StandardDeviation(a):

P := DensityPlot(RandomVariable(Normal(m, s))):

with(plots):

display(h, P)

 

``


 

Download distribution_graph.mw

Why did you change the date anyways?  Since Maple checks the date of your system it's flagged because your install date is ahead of the real date.

Try changing your date to a time ahead of the maple install files.

Based on the information you gave it sounds like it's more of a dropbox issue than a Maple issue.  Dropbox is a file hosting service, so it probably just picks the first file you saved to dropbox rather than the latest version file with the same name. 

I would suggest each time you save a file to dropbox, just give it a different name.

 

It appears the list in the help menu search results are limited to 200 elements.

I think the limit should be removed altogether.

 

I can't see your equations but look at the help page on geom3d.

Use a semilcolon with equals to assign values.

A:=(1,2,3)

 

perhaps this is what you would like


with(Statistics):

X := RandomVariable(Normal(0, 1))

_R

(1)

Y := RandomVariable(Normal(0, 2))

_R0

(2)

a := Statistics:-Sample(X, 10):

b := Statistics:-Sample(Y, 10):

``

NULL

while Correlation(a, b) < .8 do a := Sample(X, 10); b := Sample(Y, 10) end do; Correlation(a, b); c := a+b; combinat:-randcomb(convert(c, list), 1)

[HFloat(-0.4490512927180816)]

(3)

````


Download correlated_sample.mw

An alternate way although slightly unconventional, but we end up with the proper sequence

seq(op([1/j, -1/(2*j)^2]), j = 1 .. 10, 2)

      1, -1/4, 1/3, -1/36, 1/5, -1/100, 1/7, -1/196, 1/9, -1/324

 

 

 

What about just nops?

nops(x+2y)

                                2

 

There may be some discrepancies

a:=2*b+5*x*z-3*z+4-sqrt(8)

                         

nops(a)
                      5

nops(evalf(a))
                         4

 

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