I want to make an ln(x) equation but it doesn't work

[Anonymous]

It could be something I am totally missing, but does somebody know what goes wrong with the formula I implemented in inventor? 

y=-2.743*ln(x) + 7.3847

[leowarren34 · Accepted solution]

Hi @Anonymous,

Remember that since you have set the equation explicit you do have to define units, it's a bit fiddly but the equation ends up like the image below, also the error is shown beside the equation bar is due the min having to be greater than but not equal to 0. It's also worth checking out this article which explains the equations for this function in more detail. https://knowledge.autodesk.com/support/inventor-lt/learn-explore/caas/CloudHelp/cloudhelp/2015/ENU/InventorLT-Help/files/GUID-A86513B2-9624-4F4D-B6BA-8409AC4F0EB8-htm.html