list command

[Alberto Candel]

(04-30-2014 05:16 PM)Tim Wessman Wrote:  Are you aware you have contextual help in the calculator that contains about 1/2 of the entire manual?

Find makelist in the LIST->MATH toolbox menu, select it, press help. This is what is shown.

Quote:Syntax: MAKELIST(expression, variable, begin, end, [increment])

Make List. Calculates a sequence of elements for a new list. Evaluates expression, incrementing variable from begin to end values, using increment steps (default 1). The MAKELIST function generates a series by automatically producing a list from the repeated evaluation of an expression.

Example: MAKELIST(2*X-1, X, 1, 5, 1) returns {1, 3, 5, 7, 9}

Using that, MAKELIST(A,A,1,4) will do what you have indicated.

Thanks. Yes, I was aware of how MAKELIST works. I just wrote an example off hand to explain how I came up with list.

My issue with lists has to do with how CAS and Symb Geometry App interact. For example, in Symb Geom convexhull applied to a list of points a+b*i creates a list, which becomes available to CAS functions, but sometimes I cannot manipulate that list the way I want. Anyway, I will need to explore this further and then try to formulate a question.

A.