Factorio Forums

this is currently unsupported, i'm not sure of the syntax but was thinking a quick solution would be to allow y= at the beginning of the formula which would invert the x-y relationship and in effect, result in a logarithmic graph.

the problem i'm trying to solve is the extreme exponential cost of research as things go on and on, it becomes unachievable within a human lifespan. i want to have the option to cap the time it might take for the research levels at my given research rate.

Use square root, it is almost as slow as logarithm.
If you really want a hard cap, just make a new infinite tech at level 100 with constant cost.

your suggested formula is not only insane, it doesn't asymptote.

having a logarithmic cost is not easily emulated with other curves. that's sort of why it's called logarithmic and not a fractional exponent. it's an inverse relationship between x and y values on the graph.

Binary logarithm (log2(x) function) is implemented for 2.0.