demo_curvelinear_grid.py and lines over 100 points?

Community matplotlib-users
1

Matlplotlib folks,

I copied the demo_curvelinear_grid.py example and noticed when using the curvelinear_test2

and plotting a line that had more than 100 points that the resulting line doesn’t plot as expected.

For example:

Replacing

ax2.plot(intp(np.array([0, 30]), 50),

intp(np.array([10., 10.]), 50))

with

ax2.plot(range(150),[10.]*150,color='g')

ax2.plot(range(100),[5.]*100,color='r')

Shows my problem.  The red line with 100 points plots just fine and as expected.  The green line with 150 points doesn’t make any sense to me (I’ve attached the output plot).  The line plots at the right radial value, but goes from 0 degrees to what looks like 14 degrees instead of 150 degrees.

Is there anything in the example code or in some of the code that limits the number of points to 100?

Thanks,

Sara

Software Versions:

Python    : 2.6.5

matplotlib.__version__ = '1.0.0'

![100vs150pts.png|700x400](upload://5Gb9HXlCgpKM42kf5MrkT1VviQU.png)



<details class='elided'>
<summary title='Show trimmed content'>&#183;&#183;&#183;</summary>

-------------------------------------------------------------------
Sara Jean Hatch
Inner Planet Mission Analysis Group
Guidance, Navigation, & Control Section
NASA - Jet Propulsion Laboratory
4800 Oak Grove Drive
M/S: 301-150
Pasadena, CA 91109
Phone: (818) 354-8723
-------------------------------------------------------------------

</details>
2

This is a bug and I just pushed a fix to the git repo.
Meanwhile, a workaround is

l1, = ax2.plot(range(150),[10.]*150,color='g')

l1._transformed_path = None
l1._subslice = False

Regards,

-JJ

···

On Tue, Mar 8, 2011 at 6:48 AM, Hatch, Sara J (343D) <Sara.J.Hatch@...369...> wrote:

Matlplotlib folks,

I copied the demo_curvelinear_grid.py example and noticed when using the
curvelinear_test2

and plotting a line that had more than 100 points that the resulting line
doesn’t plot as expected.

For example:

Replacing

ax2\.plot\(intp\(np\.array\(\[0, 30\]\), 50\),

         intp\(np\.array\(\[10\., 10\.\]\), 50\)\)

with

ax2\.plot\(range\(150\),\[10\.\]\*150,color=&#39;g&#39;\)

ax2\.plot\(range\(100\),\[5\.\]\*100,color=&#39;r&#39;\)

Shows my problem. The red line with 100 points plots just fine and as
expected. The green line with 150 points doesn’t make any sense to me (I’ve
attached the output plot). The line plots at the right radial value, but
goes from 0 degrees to what looks like 14 degrees instead of 150 degrees.

Is there anything in the example code or in some of the code that limits the
number of points to 100?

Thanks,

Sara

Software Versions:

Python : 2.6.5

matplotlib.__version__ = '1.0.0'

-------------------------------------------------------------------
Sara Jean Hatch
Inner Planet Mission Analysis Group
Guidance, Navigation, & Control Section
NASA - Jet Propulsion Laboratory
4800 Oak Grove Drive
M/S: 301-150
Pasadena, CA 91109
Phone: (818) 354-8723
-------------------------------------------------------------------

------------------------------------------------------------------------------
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its effect on application quality, and explores various alternative
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