765-2017-dc2-simple-python-spaghetti

Simple Python Implementation of Spaghetti Plots (and data generation) for CS765 DC2, Fall, 2017

This code was written by Mike Gleicher, in a hurry, in October 2017.

You are welcome to use it as a starting point for your assignment - but remember to give proper attribution.

I used Python 3.6, and the code uses various libraries (scipy, pandas, matplotlib...). These are all pretty standard.

Simple Matplotlib Implementation

simplest_matplotlib.py has the simplest implementation of the basic chart types I could think of.

It resamples the signals to make smooth charts - which also handles cases where you have long signals. Resampling may not be what you want though (since it can remove fine details).

The x axes are wrong - they give the numbering for the resampled signals.

Overall, these are really ugly. In general, Matplotlib makes ugly stuff. It is possible to tweak matplotlib to be less ugly, but I haven't done it.

I also didn't include the color legend - it's easy to do (matplotlib has a function called "colorbar" that does it for you). However, whenever I made a colorbar, it put it in a weird place.

These can serve as a starting point - or provide a reference implementation to check data sets. I hope that student implementations look nicer.

Basic Data Generator

datagen.py has some basic utility routines for reading and writing data files, and for generating random data to test things out with.

There is a SampleData directory that has CSV files I computed with datagen. It's easy enough for you to make them as well - but it requires you to have the right version of python lying around.

D3 (Javascript) version

Florian created a version in Javascript using D3. It's in a different repo: PastaVis Repo. A version running on the web is on Florian's home page. You can load the sample data into it.

SVG version

I started writing a version of the basic charts using an SVG library that we have in our group. I never finished it. Things look just as ugly as matplotlib, and it requires a weird library that isn't documented. So ignore it. I should probably remove it from the repo.

License

gleicher/765-2017-dc2-simple-python-spaghetti

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