plot(): no ticks and arrow on axes?

[Renato]

Hello, I can't understand how the ticks option works in plot()... I
want to have no ticks or labels on the axis.

Also, is it possible to show the arrows on the axis? like this:
http://www.homeschoolmath.net/blog/few-complex-numbers.gif

I'm using latest version of sage

cheers
renato

[Francois Maltey]

Renato a �crit :

Search ticks and axes in plot? and copy/paste the examples :

plot(sin(pi*x), (x, -8, 8), ticks=[[],[]], axes=false)
+ arrow((-8,0),(8,0), color="black")
+ arrow((0,-1),(0,1), color="black")

If you want a grid add a function as

def grid (xmin, xmax, ymin, ymax) :
linesYcst = add (line ([(xmin, k), (xmax, k)]) for k in [ceil
(ymin).. floor(ymax)])
linesXcst = add (line ([(k, ymin), (k, ymax)]) for k in [ceil
(xmin).. floor(xmax)])
return linesXcst+linesYcst

read the help about line2d? and find the right options !

Then add to your (almost) last plot : ....+ grid ("the right area")

F.

[Renato Budinich]

On Mon, Jan 31, 2011 at 12:48 AM, Francois Maltey <fma...@nerim.fr> wrote:

Renato a écrit :

 

many thanks 

renato

[Jason Grout]

On 1/30/11 5:48 PM, Francois Maltey wrote:
> Renato a �crit :
>> Hello, I can't understand how the ticks option works in plot()... I
>> want to have no ticks or labels on the axis.
>>
>> Also, is it possible to show the arrows on the axis? like this:
>> http://www.homeschoolmath.net/blog/few-complex-numbers.gif
>>
>> I'm using latest version of sage
>
> Search ticks and axes in plot? and copy/paste the examples :
>
> plot(sin(pi*x), (x, -8, 8), ticks=[[],[]], axes=false)
> + arrow((-8,0),(8,0), color="black")
> + arrow((0,-1),(0,1), color="black")
>
>
> If you want a grid add a function as
>
> def grid (xmin, xmax, ymin, ymax) :
> linesYcst = add (line ([(xmin, k), (xmax, k)]) for k in [ceil (ymin)..
> floor(ymax)])
> linesXcst = add (line ([(k, ymin), (k, ymax)]) for k in [ceil (xmin)..
> floor(xmax)])
> return linesXcst+linesYcst

We also have gridlines implemented:

http://sagemath.org/doc/reference/sage/plot/plot.html#sage.plot.plot.Graphics.show

(see the gridline bullet point, or search the examples for "Add grid
lines at the major ticks of the axes." and the few examples following that)

Jason