A slightly different approach but similar to Acers

m:=proc(a::list)
  local b,i:
  b:=zip(`*`,a,[ seq(i,i=1..nops(a)) ] ) :
  {seq(`if`(b[i]=0 , NULL, i), i=1..nops(b) ) }
end proc:

Sorry if it doesn't work I don't have access to Maple today so I can't test it.

**slight correction on the brackets, and it works as expected now.  :)

So to get the standard StandardDeviation value you'll have to expand the values.

with(Statistics):
aa:=[3,3,3,3,3,3,3,2,2,2,2,2,2,2,2,2,2,2,2,2]

StandardDeviation(aa)

                    0.489360484929593

Not sure why using weights would change the way it calculates the standard deviation.

In the help page it specifies the weights are a vector.

Enclose your weight list with < > brackets instead and see if that works.

Perhaps it could be done using a maplet in a similar way used in the fifa simulation by Robert Israel http://www.mapleprimes.com/posts/94471-FIFA-Simulation

Alternatively one could employ

e:=exp(1) in their maple.ini file

hence making the value e known to maple that you want it as the exponential.  Similarily one could use the same tactics for changing I to J for -1 by a slightly different tactic.

interface(imaginaryunit=J)

Keith Geddes and Gaston Gonnet

..a link http://www.mapleprimes.com/posts/40040-Gaston-Gonnet

Aside from the crtl-c crtl-v 'ing a few spaces.  There is a program called Hotkey bind (free of course) where you can set up a hotkey combination to insert 5 spaces for example.  Again it won't solve the importing of older documents it will help in the creation of future documents. 

I just loaded hotkey bind and set up crtl-t to insert 5 spaces ... it works quite well. 

I think the command surfdata confuses many people.  It doesn't actually create a 3d surface of the data like the way people are thinking.  There have been many posts on the topic.

Here's one post that might get you started http://www.mapleprimes.com/questions/200084-What-Is-Going-Wrong-With-My-3D-Surface-Plot-grid

Yes first derivatives at a point being positive will determine whether your function is increasing. 

Solving for f'(x)=0 will find points of inflection and second derivatives at that point will determine whether it's a local minimum or maximum.

combine( sin(4x)^2)
                                

expand(%)

convert(sin(4x)^2,cos)

crtl + shift + "   -   will get you into the overscript.

I don't think so. 

The only way I know is a workaround - type the comments under a different character style and change the color so it isn't visible and then to view it again change the color back to black.

**edit ** slightly misread the question.  This blanks out visibly the commented sections so you don't see them but I see now you wanted sections commented out so they won't execute.  changed the title to reflect my answer.

I came up with this answer integrating by parts using x^6

or simplify(%)

integrating by parts using x^12 brings this

The question is similar to this one.

http://www.mapleprimes.com/questions/149897-Calc-II-Related-Question

Personally I prefer to solve by parts.