#11334: Update numpy to 1.6.1
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Reporter: jason | Owner: tbd
Type: task | Status: new
Priority: major | Milestone: sage-4.8
Component: packages | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by fbissey):
Actually I am a bit confused by one of the tests:
{{{
``plot_slope_field`` takes a function of two variables xvar and yvar
(for instance, if the variables are `x` and `y`, take `f(x,y)`), and
at
representative points `(x_i,y_i)` between xmin, xmax, and ymin, ymax
respectively, plots a line with slope `f(x_i,y_i)` (see below).
``plot_slope_field(f, (xvar, xmin, xmax), (yvar, ymin, ymax))``
EXAMPLES:
A logistic function modeling population growth::
sage: x,y = var('x y')
sage: capacity = 3 # thousand
sage: growth_rate = 0.7 # population increases by 70% per unit of
time
sage: plot_slope_field(growth_rate*(1-y/capacity)*y, (x,0,5),
(y,0,capacity*2))
}}}
That function is independent of x, the next example after this depend on
both x and y. I am suspecting the messages we get in this particular case
is quite justified and it is surprising we didn't get any before. I am not
sure what the correct formula should be.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11334#comment:21>
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