How can I round off a number like 0.0000234889 (or in the form 8.829847e-07) to a power of ten, either below or above (whichever is my choice), ie here 0.00001 or 0.0001 ?
I tried round(...., digits=-100000) but it returns an error NaN error.
round(2e-07, digits=6) gives
0, while I would like
1e-06 and another function to give