Nikos Alexandris

2009-Jun-12 09:34 UTC

### [R] How to plot hyperbolic iso-lines of a cost function?

Hi R-specialists! I would like to draw some hyperbolic (iso-)lines of a cost function in a bi-dimensional space ( =shapes of a cost function ), based on (the general form): C(x) = c1*Ce + c2*Oe + c3*{ 1 - [ (1 - Ce)^a * (1 - Oe)^b ] } where: - Oe/Ce are Omission/Commission (ranging between 0 and 1 ) values in a bi-dimensional space ( see example of Oe/Ce values [1]) - c1, c2, c3, a and b are some parameters which determine "sensitivity" of the function Is there a ready-to-use plotting - function? Kind regards, Nikos --- [1] Omission/ Commission errors 0.00000000 0.42497404 0.01012416 0.35377707 0.03150321 0.30218908 0.06158611 0.26031315 0.10188418 0.21955793 0.15558828 0.17899955 0.22511156 0.14204273 0.31663164 0.10425152 0.42728035 0.06922038 0.58420896 0.03561727 0.90368397 0.00000000