Christopher2222

8 years, 74 days


These are answers submitted by Christopher2222

geom3d distance

September 06 2016 Christopher2222 4274

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

semicolon

August 11 2016 Christopher2222 4274

Use a semilcolon with equals to assign values.

A:=(1,2,3)

 

Sample

August 06 2016 Christopher2222 4274

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

 

 

 

nops

July 15 2016 Christopher2222 4274

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

 

If you wanted to force a new line on your own before getting to the end of the screen shift+enter would also continue the command.

Use www.mapleprimes.com/recent

This is the best way to view just the titles.

**edit added** ah yes, nevermind, I see you found it by clicking on the Recent button which I've never noticed.  I generally just type in the location above in the address bar and go directly to the list.  I rarely ever use the mapleprimes home page if ever. 

add

May 06 2016 Christopher2222 4274

[seq(add(a[ .. i]), i = 1 .. nops(a))]
                         [ 1, 3, 6, 10]

Maple 2016.1a is now available at the Maplesoft website that fixes this issue.

 

Issue found

April 24 2016 Christopher2222 4274

Ok finally I managed to reproduce what you might be experiencing.

The issue has to do with using the greek letter Pi and then using the wordPi.

plot(cos(x),x=0..Pi)

going back deleting Pi and replacing it with ∏ or 2*∏ then again going back deleting and replacing it with Pi.

That's what I've been able to find. 

 

 

 

 

Nothing

April 24 2016 Christopher2222 4274

My x^2 issue I found was just bad syntax there is no problem there.  Your plot issue was just you putting the wrong variable to the range.

I can not replicate any errors you produce.  Have been able to replicate the errors on another worksheet?  Are you using windows 10?  or  Mac?

 

greek character

April 24 2016 Christopher2222 4274

It seems that error only comes up when you use the greek letter from the pallete and used without the multiplication sign. 

After which no matter what you do the error won't go away until you restart and use the pallete symbol with a space as multiplication again.

You aren't explaining EXACTLY what you are doing.  I think you are missing some things in explaining what you are doing. 

The only lines causing errors are the ones that look like this after copying to notepad

(&int;)[0]^(Pi)sin(x) &DifferentialD;x;

(&int;)[0]^(2 )(x)^(2) &DifferentialD;x

Your other lines that execute properly look proper when copied to notepad.  I can only think you are doing some kind of deleting or adding a space or something in the wrong spot however which I can not duplicate.

After re-installing.  I am having no luck (or good luck as the case may be) trying to recreate the errors you experience. 

I can not, no matter what I do get the errors you see.  I am trying to find out what you are doing.

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