Swapping Registers on HP calculators

[Valentin Albillo]

n1msr Wrote:Now I am using the 15c+ [...] and need to be able to swap array elements in one of the arrays (list a[] in the Python below). When I look at the number of program steps I use, it seems inefficient. I cannot use the auto-incrementing matrix indices in this implementation - I must be able to swap two non-sucessive elements.

I suggest you forget about the Python program for the time being and just clearly explain with an example the basic manipulation you intend to perform, e.g.

"I have a 10x1 array A and another such B and I need the most efficient sequence of RPN steps to exchange element A(5,1) with element B(8,1). Also, how to exchange elements A(i,1) and A(i+1,1)"

or something like that. Also, do post your RPN code, however inefficient, to see exacctly how you're attempting to tackle the problem so that improvements can be suggested.

V.