This is a follow up to bug #104975. The PERCENTRANK function in a recent master build appears in the Function Wizard as seen on attachment #130042 [details] While the function takes three arguments, the third is not mentioned in the Structure panel and in the Formula field.
(In reply to Gabor Kelemen from comment #0) > the third is not mentioned in the > Structure panel and in the Formula field. I don't understand what you mean by this. If I input something to the third, it does get shown. Arch Linux 64-bit, KDE Plasma 5 Version: 5.4.0.0.alpha0+ Build ID: 57779b5f3a49fedd952aed70ddcce22f48b98ea5 CPU Threads: 8; OS Version: Linux 4.8; UI Render: default; VCL: kde4; Locale: fi-FI (fi_FI.UTF-8); Calc: group Built on January 13th 2016
Sorry, seems like I misunderstood the way Calc works.