Karl Ratzsch

On a second look, the behaviour is exactly what is advertised in the help The smooth unwrap option modifies the input data so that any two successive points will not differ by more than pi; a point whose y value is outside this range will be incremented or decremented by multiples of 2pi until it falls within pi of the previous point. This operation is useful for making wrapped phase measurements continuous over time. Perhaps I'm missing something here. What kind of raw angular data eligible for...

The first datapoint should just be kept as-is, because there is no knowing in advance what the data range actually is, e.g. +-pi or 0 to 2pi. And if somebody has data that goes from 5pi to 7pi, they probably have some extra knowledge the plot should preserve. ;) Attached the two-liner fix. I was slightly confused about the while loop below the change, I think it can be removed and always run exactly once. If there is a jump larger than 3pi in some data, then smooth unwrap is obviously not the right...

Very nice! Could you explain how those coefficients are calculated, practically? I tried reading up on IIR filters, but the texts I found are gibberish to me. This could be a nice demo script. FIR filters also aren't hard, I'll work out and upload an example of a script I've written in the next days. Just need two arrays for the coefficients and the sampling buffer, and gnuplot's summation operator.

The default fonts used vary largely depending on the terminal setting (and local computer, e.g. what fonts are available, how the font subsystem is configured), and gnuplot doesn't really know what the default setting is, unless you set one explicitly for your terminal, e.g. in your .gnuplot / gnuplot.ini file. I don't know what you mean by "giant", windows describes font sizes by numbers. Or do you have a font that's called "giant", which really isn't? What terminal are you using? Please provide...

You can (should, usually, from a scientific point) also limit the plot to the range for which you did the fit. plot sample [6:10] a * x+b lc 1 lw 3 title "fit region", \ [3:6] a * x + b lc 1 title "extrapolation", \ $dat

For "plot" command, the index feature can not be used with stringcolumns.

Data sets are separated by two blank lines in the data file, and the first set has index number zero.

smooth mcsplines w table crashes