For now, perhaps the workaround is to use
plot(lambda x: h(x)).show(xmin=0, xmax=1)
Note that xmin, xmax work properly only with show when xmax < xmin.
ymin, ymax work with both plot() and show() and is used to "zoom in" on
the rendered graph. This is ticket
http://trac.sagemath.org/ticket/13368
If you ever intend to flip a graph, then use the usual format instead of
xmin, xmax in the case xmax < xmin:
plot(lambda x: h(x), (x, 0, 1))
plot(lambda x: h(x), (x, 0, 1)).show(xmax=0, xmin=1)
- basu.
On 12/19/2013 01:38 AM, Alden wrote:
Given what the patch is supposed to do, it seems like it should fix it.
However, when I try to install the patch, I get the error "abort:
failed to synchronize metadata for "sage/plot/plot.py". Anyway, not a
huge deal, so I guess I should just wait until the patch is integrated
in sage 6.1.
On Tuesday, December 17, 2013 5:36:34 PM UTC-6, P Purkayastha wrote:
Does the patch here help: http://trac.sagemath.org/ticket/15030
<http://trac.sagemath.org/ticket/15030> ?
On 12/18/2013 06:48 AM, Alden wrote:
> I wrote a class with a __call__ method, and I want to plot an
instance
> of it using plot() in the sage notebook. I run the commands:
>
> import circle_homeo
> import cyclic_order
> h = circle_homeo.PSL2R_action(cyclic_order.CyclicOrder('abAB'))[0]
>
> (this doesn't matter; all that should matter is that h is some
callable
> class)
>
> plot(h, xmin=0, xmax=1)
>
> returns the error:
>
> *****************************************
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "_sage_input_32.py", line 10, in <module>
> exec compile(u'open("___code___.py","w").write("# -*-
coding: utf-8
> -*-\\n" +
>
_support_.preparse_worksheet_cell(base64.b64decode("cGxvdChoLCB4bWluPTAsIHhtYXg9MSk="),globals())+"\\n");
> execfile(os.path.abspath("___code___.py"))
> File "", line 1, in <module>
> File "/tmp/tmpnBGA3K/___code___.py", line 3, in <module>
> exec compile(u'plot(h, xmin=_sage_const_0 ,
xmax=_sage_const_1 )
> File "", line 1, in <module>
> File
>
"/home/akwalker/Documents/software/sage-5.3/local/lib/python2.7/site-packages/sage/misc/decorators.py",
> line 692, in wrapper
> return func(*args, **kwds)
> File
>
"/home/akwalker/Documents/software/sage-5.3/local/lib/python2.7/site-packages/sage/misc/decorators.py",
> line 537, in wrapper
> return func(*args, **options)
> File
>
"/home/akwalker/Documents/software/sage-5.3/local/lib/python2.7/site-packages/sage/plot/plot.py",
> line 1130, in plot
> G = _plot(funcs, (xmin, xmax), **kwds)
> File
>
"/home/akwalker/Documents/software/sage-5.3/local/lib/python2.7/site-packages/sage/plot/plot.py",
> line 1236, in _plot
> funcs, ranges = setup_for_eval_on_grid(funcs, [xrange],
> options['plot_points'])
> File
>
"/home/akwalker/Documents/software/sage-5.3/local/lib/python2.7/site-packages/sage/plot/misc.py",
> line 148, in setup_for_eval_on_grid
> return fast_float(funcs, *vars,**options),
> [tuple(range+[range_step]) for range,range_step in zip(ranges,
range_steps)]
> File "fast_eval.pyx", line 1377, in sage.ext.fast_eval.fast_float
> (sage/ext/fast_eval.c:9718)
> AttributeError: EquivariantRHomeo instance has no attribute
'__float__'
> *******************************************
>
> However, if I do:
>
> f = lambda x:h(x)
> plot(f, xmin=0, xmax=1)
>
> That works fine. Is there something I need to do to the class to
> convince plot() to call it?
>
>
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