The integrateODE function is unavailable even with the mosaic library for r(3.5.2).
package ‘mosaic’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\mmarikar\AppData\Local\Temp\Rtmpq8LdLQ\downloaded_packages
soln = integrateODE(dx~rx(1-x/k), k=10, r=.5, tdur=20, x=1)
Error in integrateODE(dx ~ r * x * (1 - x/k), k = 10, r = 0.5, tdur = 20, :
could not find function "integrateODE"