Possible typo in RJournal manuscript

[julianstanley]

Hi! Thanks for this fantastic package.

Not sure if this is the place for this, but I think there might be a typo in the associated R Journal manuscript (found here)

I think this is the other way around, right? (e.g. dx/dt = -x is stable at x=0, and k<0; dx/dt = x is unstable at x=0, and k>0)