matplotlib Archives - Page 19 of 43

Generating matplotlib graphs without a running X server

August 17, 2022 by Magenaut

Matplotlib seems to require the $DISPLAY environment variable which means a running X server.Some web hosting services do not allow a running X server session.Is there a way to generate graphs using matplotlib without a running X server? [<a href="https://getridbug.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="a6d3d5c3d4c8c7cbc3e6cec9d5d2c8c7cbc3">[email protected]</a> ~]$ python2.6 Python 2.6.5 (r265:79063, Nov 23 2010, 02:02:03) [GCC 4.1.2 20080704 (Red … Read more

Matplotlib: How to plot images instead of points?

August 17, 2022 by Magenaut

I want to read a list of images into Python/Matplotlib and then plot this images instead of other markers (like points) in a graph. I have tried with imshow but I didn’t succeed, because I cannot shift the image to another position and scale it appropriately. Maybe somebody has a good idea : )
It should look somehow like this! (Without the Spongebob, but with very serious data of course!)

vary the color of each bar in bargraph using particular value

August 17, 2022 by Magenaut

I have a bar-graph like the following: http://matplotlib.org/examples/api/barchart_demo.html

stop / start / pause in python matplotlib animation

August 17, 2022 by Magenaut

I’m using FuncAnimation in matplotlib’s animation module for some basic animation. This function perpetually loops through the animation. Is there a way by which I can pause and restart the animation by, say, mouse clicks?

Imshow: extent and aspect

August 17, 2022 by Magenaut

I’m writing a software system that visualizes slices and projections through a 3D dataset. I’m using matplotlib and specifically imshow to visualize the image buffers I get back from my analysis code.

How to extract data from matplotlib plot

August 17, 2022 by Magenaut

I have a wxPython program which reads from different datasets, performs various types of simple on-the-fly analysis on the data and plots various combinations of the datasets to matplotlib canvas. I would like to have the opportunity to dump currently plotted data to file for more sophisticated analysis later on.

Non-ASCII characters in Matplotlib

August 17, 2022 by Magenaut

I have a problem displaying non-ASCII characters in Matplotlib, these characters are rendered as small boxes instead of a proper font, it looks like (I filled these boxes with red paint to hightlight them):

How to convert a NumPy array to PIL image applying matplotlib colormap

August 17, 2022 by Magenaut

I have a simple problem, but I cannot find a good solution to it.

Plotting a decision boundary separating 2 classes using Matplotlib’s pyplot

August 17, 2022 by Magenaut

I could really use a tip to help me plotting a decision boundary to separate to classes of data. I created some sample data (from a Gaussian distribution) via Python NumPy. In this case, every data point is a 2D coordinate, i.e., a 1 column vector consisting of 2 rows. E.g.,

How do you set the absolute position of figure windows with matplotlib?

August 17, 2022 by Magenaut

I’m writing a simple Python application that uses matplotlib to display a few figures on screen. The number of figures generated is based on user input and changes throughout the application’s life. The user has the ability to issue a “plot” command to generate a new figure window with the selected data series. In order to improve the user experience, I would like to provide another command that would programmatically arrange all open figure windows in some convenient arrangement (e.g. tile them across the available screen space).