series.Mean() returns NaN when any element in a series of floats is NaN

[evanmcclure]

I was exploring a dataset and discovered that when any element in a Series of floats is NaN, the function called series.Mean() invalidates the entire series and returns NaN. I expected series.Mean() to exclude values with NaN when computing the mean.

[evanmcclure]

I believe the fix should happen within series.Float(), perhaps using another version of series.Float() lets the user exclude NaN values, before the slice ever gets passed to gonum. I believe the other statistical functions in Series should also have the same behavior. That is, exclude NaN values in the series.

[evanmcclure]

I'll clone and submit a PR for this change. Then, you can let me know if you think this is worthwhile.

[dalizitajiu]

I'll clone and submit a PR for this change. Then, you can let me know if you think this is worthwhile.

has this pr merged to master branch?

[salahuiste]

@dalizitajiu same question