Piecewise Cubic Hermite Interpolating Polynomial in javascript

down vote favorite 1 I'll try again, I've written this earlier in Matlab: angles_main = [0 7 9 12 28 60 90 120 150 180]*pi/180; cl_main = [0.000 0.948 1.138 1.250 1.427 1.269 1.125 0.838 0.296 -0.112]; CL_main = interp1(angles_main,cl_main,AWA_RED,'PCHIP'); Now I try to convert the same code to javascript but I haven't found "PCHIP" equivalent for javascript. If you are willing to do the PCHIP function in javascript please leave me your offer