Live Curve Fit

[mparagano]

I've built a VI that acquires a time-variant signal from a DAQ, uses a collector to store the last 20 signals, and then uses the curve fit express FI to fit a linear curve to the data.  However, upon initializing the program, it gives me a warning because there's only one data point (linear fit needs >=2).  Is there way to duplicate the initial value or delay initializing the curve fit VI a time step so that I no longer receive the warning?  I feel like the delay block might also work, but I seem to be missing the solution.

Thanks

I've attached an example VI; obviously the DAQ signal isn't here.

[Gregory]

You can put a case structure around the part that you'd like to skip on the first iteration. Make the i=0 case not contain your curve fitting code, and make the default case have it.