Google Earth Engine（GEE）——NDVI的时间序列分析和在线出图
函数：
ui.Chart.array.values(array, axis, xLabels)
Generates a Chart from an array. Plots separate series for each 1-D vector along the given axis.
- X-axis = Array index along axis, optionally labeled by xLabels.
- Y-axis = Value.
- Series = Vector, described by indices of the non-axis array axes.
Returns a chart.