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Here is a list of ideas for tutorials:

• read in a list of x,y points (ra, decs) and plot.
• read in, manipulate, plot spectrum from an IRAF FITS file. Measure EW, divide by another spectrum. address common MEF issues. write out in various formats (IRAF, two column). output plot as PDF.
• display an image from an IRAF FITS file. oplot point sources. address common MEF issues. write out in various formats.
• read in something, converting from mags to fluxes, make make SED plot
• indexing: how to do things that we would otherwise do with a IDL's where function
• how to do the same thing to everything in an array at once (like we are used to doing in IDL).
• fit a straight line/polynomial/power law/gaussian to a 2D scatter plot. EG: Markwardt fitting
• Chi^2 minimization.
• interpolation and rebinning. (e.g., increasing sampling of lower-resolution spectrum.)
• applying a gaussian filter to spectrum or point source. (e.g. lowering resolution of high-res spectrum.)