Hello Al,
try something like this:


If you want o test other nodes, You have to copy the nodefiles into the nodes folder an register them in index.html. If you replace core Stuff like litegraph.js you should make a copy of the original first. For the average stuff (better interpolation) I made only little changes in litegraph.js to show the function. To use it You have to make corrections in the basicFunctions.js file I have posted, but Max has created already a special node for that. The patharray is untested an has a performance problem for a sequence of numarray inputs. I have to improve it.

Have a nice day
Karsten