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MaplePrimes Activity

These are answers submitted by Christopher2222


You could try a couple of ways

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



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

2/ transform the plot with plottools




Oh, I see custom components are in the pallete off to the left side.  So then all I do is drag and drop a component in the cell and modify from there.  I was looking in the file insert and everywhere but the pallete and couldn't find anything. 

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

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

Quantum mechanics using computer Algebra

Maple package for computation in Lie algebras

Mathematics of CLIFFORD - A Maple package for Clifford and Grassmann algebras


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



As a start, you mean something like this? 




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):


m := Statistics:-Mean(a):

s := Statistics:-StandardDeviation(a):

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


display(h, P)





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.



perhaps this is what you would like


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



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



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

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



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)





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




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