[R] Unique matching of two sets of multidimensional data

eight, and blood pressure of those 100 people again, but you forgot to write down their names. (assume that the scale and ruler errors have not changed since the first measurement) How to assign the second set of measurements to the first? Leif Kirschenbaum, Ph.D., PMP Principal Reliability E

[R] Multiply Iterated Measurements and Pairwise Comparison

I am familiar with pairwise t-tests, corrections for multiple testing, etc. however I have a problem whose answer I have not found after extensive R-help archive and Google searching. What I have done in the past: I have N items which are measured, exposed to a condition, and then measured agai

[R] Confidence interval calculation for intersection of two quadratic lines

How do I calculate the confidence interval for the value x given by the intersection of two quadratics (i.e. parabolas)? I fit two quadratics of the form: y = C1 + B1*x + A1*x^2 y = C2 + B2*x + A2*x^2 to two sets of points N1 and N2. I test for whether they intersect, if they do then I cal