I have a dataset.  For example
with(Statistics):
a := [0, 7, 0, 7, 20, 18, 34, 34, 35, 35,1, 7, 10, 6, 7, 5, 4, 7, 7, 2, 6, 2, 22, 2, 3, 12, 12, 14, 10]; 
Histogram(a,frequencyscale=absolute);

How do I create a smooth line curve through the points.  Also it doesn't seem to bar graph properly, the 0's and 1's are combined and the 35's and 34's are combined.  Not sure why that is.

I'd like Maple to simulate airflow over a specified vehicle shape, and get it to display something similar to this.  ...

arghh.  Can't get pictures to paste, sorry.  So far I've never been able to insert a picture, haven't had the need and so haven't worried about it and now when I want to insert a picture, it's not just a straight forward thing.  Any help with that would be apprecited. 

with(plots):
contourplot(-z*(1/(x^2+z^2)^(3/2)-1),x=-3..3,z=-3..3,grid=[50,50],contours=10);

Doesn't seem like maple is plotting enough point for a nice smooth rounded graph.  Can I smooth them to look more realistic?

Can I plot a line with plot3d using single x,y points? 

plot3d([1,2],x=-1..1,y=-1..2);  Gives me two planes at x=1 and 2.  Can plot3d instead give me a line through that point?

I was checking out a problem that graphically solved e (2.71828....) etc..

A procedure was created to find the slopes of incremental numbers between 2 selections.  The procedure was in it's simplest form like this

E := proc(c,d)
plot({(c+(d-c)*j/10^x-x-1 $ j=0..10}, x=0..(d-c)/1000,xtickmarks=0);
end;

Now so I start the process

E(2,3);

The slope closest to 0 and just under will determine my next decimal point.  So I find the next number as 7.  I continue finding more decimal points graphically using the procedure.