Re: [Maxima-discuss] explit plotting in wxdraw2d

[Eric B. <ej...@gm...>]

Here's another way that may or may not be simpler than your polygon

wxdraw2d(points_joined=true,point_type=0, line_width=3,
    points([[1,1],[1,4]]),
    xrange=[-2,2],yrange=[0,5]);

Eric

On Mon, Feb 13, 2017 at 3:52 PM Evan Cooch <eva...@gm...> wrote:

> For a variety of reasons, I need to be able to plot a vertical line, wrt
> to the horizontal axis, in a plot. For the life of me, I'm not sure how
> to do this using wxdraw2d (or if its even possible). Suppose I want a
> simply x-y plot, with a horizontal line at y=200 over all x, and a
> vertical line at x=100 over all y.
>
> First, I call a few things, and set some defaults:
>
> load("draw")$
>
> set_draw_defaults(
>        grid=true,
>        xaxis = true, yaxis = true,
>          xaxis_type = solid, yaxis_type = solid,
>        proportional_axes=xy)$
>
> wxplot_size: [250, 250] $
>
> wxdraw2d(x_voxel = 100,
>     y_voxel = 100,
>     line_width=2,color="black",
>     explicit(200,x,0,250), /* horizontal line */
>     explicit(100,y,0,250)); /* vertical */;
>
>
> But, this doesn't work. It seems that explicit within wxdraw2d must be a
> function in x.If thats the case, then how the heck would you ever draw
> something like...x=100 over all y? In other words, a vertical reference
> line? The only way I could 'get something to work' seems like a kludge
> -- using polygon:
>
> wxdraw2d(
>     line_width=2,color="black",
>     explicit(200,x,0,250), /* horizontal line */
>     polygon([100,100],[0,250])); /* vertical */;
>
> Does the trick but...is there a better way that I'm missing?
>
> Thanks!
>
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> _______________________________________________
> Maxima-discuss mailing list
> Max...@li...
> https://lists.sourceforge.net/lists/listinfo/maxima-discuss
>