BETA version no longer allows exponentiation of litsts - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: BETA version no longer allows exponentiation of litsts (/thread-17113.html) BETA version no longer allows exponentiation of litsts - Mike Elzinga - 06-15-2021 05:51 PM It appears that exponentiation and logarithm functions no longer handle lists in the current BETA versions. For example, being able to exponentiate lists is useful when generating a set of probabilities in a canonical probability distribution in statistical mechanics. There the probability of the occupancy of an energy state, E(i), is p(i) = e^(-E(i)/kT)/Z, where Z is the sum over all e^(-E(i)/kT). Of course, there is a workaround using MAKELIST; but retaining the ability of functions to handle lists helps retain the readability of a program when it handles lists of data. I tried to insert some images but my internet went down briefly while I was writing this post. RE: BETA version no longer allows exponentiation of litsts - Mike Elzinga - 06-15-2021 06:36 PM (Still having some intermittent internet connection problems, but here are some examples.) For Version (2021 04 28) BETA L1:={2,-2,3,-3} TAN(L1) gets {-2.19,2.19,-0.14,0.14} TAN({L1}) gets {{-2.19,2.19,-0.14,0.14}} e^L1 gets ERROR: Bad argument type e^{L1} gets {{7.39,0.14,20.09,0.05}} LN(L1) gets ERROR: Invalid input For Version (2020 01 16) everything is the same except that e^L1 gets {7.39,0.14,20.09,0.05} which is consistent with how it works with other functions except the logarithm function. RE: BETA version no longer allows exponentiation of litsts - Mike Elzinga - 06-15-2021 07:03 PM I may have given the impression that logarithms don't work on lists in the BETA version. They do. If L2 is {1,2,3,4} LN(L2) is {0,0.69,1.10,1.39} My apologies for three posts. I am working around some internet connection issues.