#10489: plot_slope_field broken
------------------------------------------------------+---------------------
Reporter: ManDay | Owner: jason,
was
Type: enhancement | Status:
positive_review
Priority: major | Milestone:
sage-4.8
Component: graphics | Keywords:
plot_slope_field beginner sd35.5
Work_issues: | Upstream: N/A
Reviewer: Aly Deines, Ryan Grout, Benjamin Jones | Author:
Merged: | Dependencies:
------------------------------------------------------+---------------------
Changes (by benjaminfjones):
* status: needs_review => positive_review
* reviewer: Aly Deines, Ryan Grout => Aly Deines, Ryan Grout, Benjamin
Jones
Old description:
> '''plot_slope_field( lambda x,y: x+y,(x,-3,4),(y,-2,2) );'''
>
> results in
>
> {{{
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "_sage_input_15.py", line 10, in <module>
> exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8
> -*-\\n" +
> _support_.preparse_worksheet_cell(base64.b64decode("cGxvdF9zbG9wZV9maWVsZCggbGFtYmRhIHgseTogeCt5LCh4LC0zLDQpLCh5LC0yLDIpICk7"),globals())+"\\n");
> execfile(os.path.abspath("___code___.py"))
> File "", line 1, in <module>
>
> File "/tmp/tmp639i0K/___code___.py", line 3, in <module>
> exec compile(u'plot_slope_field( lambda x,y: x+y,(x,-_sage_const_3
> ,_sage_const_4 ),(y,-_sage_const_2 ,_sage_const_2 ) );
> File "", line 1, in <module>
>
> File "/homes/sageserv/sage-4.5.1-Solaris_10_SPARC/local/lib/python2.6
> /site-packages/sage/plot/plot_field.py", line 220, in plot_slope_field
> norm = sqrt((f**2+1))
> TypeError: unsupported operand type(s) for ** or pow(): 'function' and
> 'int'
> }}}
New description:
'''plot_slope_field( lambda x,y: x+y,(x,-3,4),(y,-2,2) );'''
results in
{{{
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_15.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8
-*-\\n" +
_support_.preparse_worksheet_cell(base64.b64decode("cGxvdF9zbG9wZV9maWVsZCggbGFtYmRhIHgseTogeCt5LCh4LC0zLDQpLCh5LC0yLDIpICk7"),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmp639i0K/___code___.py", line 3, in <module>
exec compile(u'plot_slope_field( lambda x,y: x+y,(x,-_sage_const_3
,_sage_const_4 ),(y,-_sage_const_2 ,_sage_const_2 ) );
File "", line 1, in <module>
File "/homes/sageserv/sage-4.5.1-Solaris_10_SPARC/local/lib/python2.6
/site-packages/sage/plot/plot_field.py", line 220, in plot_slope_field
norm = sqrt((f**2+1))
TypeError: unsupported operand type(s) for ** or pow(): 'function' and
'int'
}}}
-----
To release manager:
* apply [[trac-10489-slope-field-lambda-4-7-3.patch trac-10489-slope-
field-lambda-4-7-3.patch]] to the Sage library
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10489#comment:16>
Sage <http://www.sagemath.org>
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and MATLAB
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