Hi, I am hoving trouble understanding how variables are meant to be declared. I have global variables that I wish to use that are tabled values such as m[1], ie: m subscript 1.However, when declaring parameters, local, or global variables within a procedure it does not allow them to be tables values. Why is this? and How should i be declaring these values?for example:Range:=proc(b[1]).... b subscript 1 will generate invalid parameter declarationRange:=proc(b) local c[1]...c subscript...

Hi, I have read the help files, and many posts in MaplePrime. However, I am struggling to understand how to properly extract a number from a list. I would like to extract only the positive, or the maximum solution of a quadratic expression.I have uploaded the .mw file. (1) (2) (3) (4) With no brackets around A it does no work, Error, incorrect number of extra arguments in select If I extract the positive value I get a list, (5...