Concentric ellipses with TikZ

Question

I am hoping to recreate the image you see below in tex (the original here was done in Word). After snooping around for some time, I see that this should be done using the Tikz package. However, I don't have any experience with this package and am trying to prepare this for a lecture relatively soon (poor planning on my part). Can anyone help recreate this image? enter image description here

Thank you! Any and all help is much appreciated!

Welcome to TeX.SX. Questions about how to draw specific graphics that just post an image of the desired result are really not reasonable questions to ask on the site. Please post a minimal compilable document showing that you've tried to produce the image and then people will be happy to help you with any specific problems you may have. See minimal working example (MWE) for what needs to go into such a document. — , Mar 20 '15 at 18:01
You might also like Gaussian ellipsoids using tikz, Draw a bivariate normal distribution in TikZ, and How can two bivariate normal distributions be plotted in one plot? — Jake, Mar 20 '15 at 18:23

score 6 · Answer 1 · answered Mar 20 '15 at 18:15

The shadow stuff is a Word habit. I recommend you to reconsider that habit because it doesn't mean anything plus it gives the idea that these things are floating which is obviously not the case.

\documentclass[tikz]{standalone}
\begin{document}
\begin{tikzpicture}
\draw[thick] (-1,0) -- (1,0) (0,-1) -- (0,1);
\draw[rotate around={45:(-0.5,0.5)},double=red,ultra thin,double distance=0.5pt] (-0.5,0.5) ellipse (0.2 and 0.5) ellipse (0.4 and 0.8);
\draw[rotate around={45:(0.5,-0.5)},double=blue,ultra thin,double distance=0.5pt] (0.5,-0.5) ellipse (0.2 and 0.5) ellipse (0.4 and 0.8);
\end{tikzpicture}
\end{document}

enter image description here

Concentric ellipses with TikZ

1 Answers1