Question

For anyone working on volume of revolution, this may help you.

Answer 1

Go to: http://www.sagenb.org/
Log in using
Username: Solid
Password : revol
Once logged in, click Solid

Answer 2

Thanks.

I got in, couldn't find button solid, pressed published and got a page starting off with

var('y, theta, x'

and with an f(x) already in an entry box at the bottom.

Couldn't get it to do anything though?

Answer 3

Ah, it says "untitled" on my page...

Answer 4

Click it

Answer 5

This is the actual link http://www.sagenb.org/home/solid/0

Answer 6

Try this
http://www.sagenb.org/home/Solid/

Answer 7

Wants me to name it, go ahead?

Answer 8

Or rename it, to be precise..

Answer 9

go ahead

Answer 10

Function in the first entry box?

Answer 11

Yes, it is bunch of code, go down from there

Answer 12

Yes I did already, I have put -x^2 +2 in the first entry box and clicked evaluate..

Next?.

Answer 13

evaluate? There is 'update' button, is that it

Answer 14

Oh I see, you have supplied another pic, let me look at that.

Answer 15

Mine doesn't look like that it has an entry box with evaluate under it.

Answer 16

Do you want a pic?

Answer 17

Yes, please

Answer 18

Okay, click in the textbox with code in it and press shift enter

Answer 19

loading an applet, some boxes.

Answer 20

OK, got it:-)

Answer 21

ok,Have fun

Answer 22

Salud! I have sagenb on my other machine...

Answer 23

I can download the worksheet..

Answer 24

I have it on my Ubuntu part of my machine but does not work anymore

Answer 25

I used to run it in a Linux emulation on XP but stopped working in WIn 7 (64 bit).

Answer 26

Andlinux (is Ubuntu).

Answer 27

I though it might help people visualize it, but I have to figure out a way for people to access it without logging in

Answer 28

So what happens if you share/publish? Still have to log in (using their server, I suppose u have to).

Answer 29

The 3D plot does not work in published document

Answer 30

Ah....

Answer 31

http://www.sagenb.org/home/pub/2893

Answer 32

Traceback (click to the left of this block for traceback)
...
NameError: name 'ring' is not defined

Answer 33

#auto
@interact
def _(func1=input_box('x^2',label='f(x)=',type=str),
func2=input_box('x',label='g(x)=',type=str),a=0,b=1,
axis=selector(['x','y'],label='Axis of rotation:',buttons=True),auto_update=False):
f = lambda x: sage_eval(func1,{'x':x})
g = lambda x: sage_eval(func2,{'x':x})

if axis=='x':
f1 = lambda t,x: x
f2 = lambda t,x: f(x)*cos(t)
f3 = lambda t,x: f(x)*sin(t)
g1 = lambda t,x: x
g2 = lambda t,x: g(x)*cos(t)
g3 = lambda t,x: g(x)*sin(t)
else:
f1 = lambda t,x: x*cos(t)
f2 = lambda t,x: x*sin(t)
f3 = lambda t,x: f(x)
g1 = lambda t,x: x*sin(t)
g2 = lambda t,x: x*cos(t)
g3 = lambda t,x: g(x)
g3d = parametric_plot3d([f1,f2,f3],(0,2*pi),(a,b),color='orange',opacity=0.5)
g3d += parametric_plot3d([g1,g2,g3],(0,2*pi),(a,b),color='green',opacity=0.5)

show(g3d)

Answer 34

Yes, I get everything except the applet plus that error.

The trouble is not with the Java, I just checked the console for that.

Answer 35

I took out the codes about ring, maybe try replacing the code with one above

Answer 36

That works...

Answer 37

Still shows the error, but works...

Answer 38

nice

Answer 39

So I guess maybe you repost this, I see a lot of solrev questions on here.

Answer 40

Yeah, but most student might not be patient enough to go through all of this

Answer 41

But you can publish now, with the amended code and it will work?

Answer 42

Like go http://www.sagenb.org/home/pub/2893

Enter function, enter...blah blah, pressupdate, done.

Answer 43

No, the graphics does not come up

Answer 44

It did for me....

Answer 45

might be a server prob, I will putting it on my University server,lol

Answer 46

http://www.sagenb.org/home/pub/2893 doesn't have the code changed?

Answer 47

That's interesting, after I pressed edit a copy, it came up...

Answer 48

Link's gone, I guess u are editing it...

Answer 49

it seems that we broke the server

Answer 50

Ooops....

Answer 51

Maybe it's a antihacking thing...