Data for variance and covariance figure

Data for a figure that presents the variance and covariance for a true random walk. There is a comparison shown between the numerical result from 1024 unique random walks and the analysis, by kinisi, of the same 1024 random walks.<br><br>Created using <a href="https://github.com/rodluger/showyourwork">showyourwork</a> from <a href="git@github.com:arm61/msd-errors/tree/75fc5afb67cd43425ac5554449aba4bddab52e84">this GitHub repo</a>.