Contour plot in python

absrocks007 · May 13, 2019, 23:57

Hi, I have unstructured grid data set with which I want to get pressure and velocity contours. I am using python to plot the contours. Here is the link which provided the details how to plot contours from unstructured grid data

https://scipy-cookbook.readthedocs.i...aced_data.html

I used the above mentioned method to plot pressure and velocity contours. In the velocity contour the wall region is properly visualized, whereas in the pressure contour the region is not visible, the region is filed by the color. The images are attached

Any help regarding this will be appreciated

https://ibb.co/F52Jqc6
https://ibb.co/0tNZBm7

Svetlana · May 20, 2019, 00:50

Can I see your code? Or is it exactly the same as at the page you linked?

Kolan · May 23, 2019, 13:37

If your data is unstructured you may first need to convert the scattered points to a plaid array. The scipy function griddata will do this for you. Then use matplotlib’s contourf.

However looking at your images the data looks clipped. Just adjust the contour levels.

May 13, 2019, 23:57	Contour plot in python	#1
absrocks007 New Member Abhishek Mukherjee Join Date: Nov 2018 Posts: 6 Rep Power: 8	Hi, I have unstructured grid data set with which I want to get pressure and velocity contours. I am using python to plot the contours. Here is the link which provided the details how to plot contours from unstructured grid data https://scipy-cookbook.readthedocs.i...aced_data.html I used the above mentioned method to plot pressure and velocity contours. In the velocity contour the wall region is properly visualized, whereas in the pressure contour the region is not visible, the region is filed by the color. The images are attached Any help regarding this will be appreciated https://ibb.co/F52Jqc6 https://ibb.co/0tNZBm7

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May 20, 2019, 00:50		#2
Svetlana Senior Member Svetlana Tkachenko Join Date: Oct 2013 Location: Australia, Sydney Posts: 416 Rep Power: 15	Can I see your code? Or is it exactly the same as at the page you linked?

May 23, 2019, 13:37		#3
Kolan New Member Kevin Nolan Join Date: Nov 2012 Posts: 13 Rep Power: 14	If your data is unstructured you may first need to convert the scattered points to a plaid array. The scipy function griddata will do this for you. Then use matplotlib’s contourf. However looking at your images the data looks clipped. Just adjust the contour levels.