How to interpolate curves

[#1]

How to interpolate curve 1 (with sparse points) to match the number of points in curve 2 in order to do further calculations. 

[#2]

You can use function interpolate(), see formula.

Before applying formula, I splitted data of current into two columns, see table attached.

Interpolate (jmp.com)

Interpolate(
	:"Voltage(V)"n,
	:"Voltage(V)"n[Loc Nonmissing( :"Current(A)_1"n << get values )],
	:"Current(A)_1"n[Loc Nonmissing( :"Current(A)_1"n << get values )]
)

[#3]

Other option could be using graph builder and getting formula from smoother:

1. Change Curve modeling type to nominal

2. Create smoother graph with Curve as overlay and change settings to fit the lines

3. Click on the red triangle on Smoother and select Save Formula

4. Now  you should have a formula in your data table

5. With the formula you could then add "missing" voltage values for Curve 1 (add new rows to data) and then create final Current column which would have your original values from Current(A) and then missing values replaced with the Smoother columns values

Edit:

I would also suggest out checking out Fit Y by X platform