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ui.Chart.image.doySeriesByYear

Generates a Chart from an ImageCollection. Plots the derived value of the given band in a region for each day-of-year across different years.

- X-axis: Day of year (startDay to endDay, defaults to 1 to 366).

- Y-axis: Derived band value (reduced within the region).

- Series: Years.

Returns a chart.

Usage	Returns
`ui.Chart.image.doySeriesByYear(imageCollection, bandName, region, regionReducer, scale, sameDayReducer, startDay, endDay)`	ui.Chart

Argument	Type	Details
`imageCollection`	ImageCollection	The ImageCollection to chart.
`bandName`	Number\|String	The name of the band to chart.
`region`	Feature\|FeatureCollection\|Geometry, optional	The region to reduce. Defaults to the union of all geometries in the image collection.
`regionReducer`	Reducer, optional	Reducer for aggregating band values within the region. Must return a single value. Defaults to ee.Reducer.mean().
`scale`	Number, optional	Scale to use with the region reducer in meters.
`sameDayReducer`	Reducer, optional	Reducer for aggregating band values across images with the same (DoY, year) pair. Must return a single value. Defaults to ee.Reducer.mean().
`startDay`	Number, optional	Day of year to start the series. Must be between 1 and 366.
`endDay`	Number, optional	Day of year to end the series. Must be between startDay and 366.