Hi, I have a (newbie) question about how to go about solving the problem below with commons-math.
1) I have histogram data (equal x intervals) based off some distribution. 2) I need a way to calculate the second differential between two given x points in the distribution. Here is what I think I should do: 1) Feed the (x,y) values represented by the top of each histogram entry within my x-range into a UnivariateRealInterpolator between ranges (x1,y1) and (x2,y2). 2) The interpolate method gives me back a PolynomialSplineFunction (call if psf). 3) I get the second differential UnivariateRealFunction (call it urf) by calling psf.getPolynomialSplineDerivative().derivative() 4) I compute the second derivative value as the difference of urf.value(x2) - urf.value(x1) Does this sound like a reasonable/accurate approach? Any suggestions/gotchas or pointers to better approaches? Thanks very much, Sujit --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
