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ui.Chart.image.doySeries
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
根据 ImageCollection 生成图表。绘制区域中每个波段在一年中每一天的派生值。
- X 轴：一年中的某天（从 startDay 到 endDay，默认值为 1 到 366）。
- Y 轴：派生频段值（在区域内和不同年份间均有所减少）。
- 系列：频段名称。
返回图表。
| 用法 | 返回 |
|---|
ui.Chart.image.doySeries(imageCollection, region, regionReducer, scale, yearReducer, startDay, endDay) | ui.Chart |
| 参数 | 类型 | 详细信息 |
|---|
imageCollection | ImageCollection | 要绘制图表的 ImageCollection。 |
region | Feature|FeatureCollection|Geometry，可选 | 要缩减的区域。默认值为图片集合中所有几何图形的并集。 |
regionReducer | Reducer，可选 | 用于汇总区域内频段值的 Reducer。必须返回单个值。默认值为 ee.Reducer.mean()。 |
scale | 数字，可选 | 缩放以与区域缩小器搭配使用（以米为单位）。 |
yearReducer | Reducer，可选 | 用于汇总多年（针对给定日期）的 regionReducer 输出的 Reducer。必须返回单个值。默认值为 ee.Reducer.mean()。 |
startDay | 数字，可选 | 系列开始的年份日期。必须介于 1 到 366 之间。 |
endDay | 数字，可选 | 结束序列的年份日期。必须介于 startDay 和 366 之间。 |
如未另行说明，那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可，并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情，请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003eGenerates a chart displaying the derived values of each band in a specified region for every day of the year.\u003c/p\u003e\n"],["\u003cp\u003eThe chart uses day of the year as the X-axis, derived band values as the Y-axis, and separate series for each band name.\u003c/p\u003e\n"],["\u003cp\u003eUsers can customize the region, data aggregation methods, and the time range displayed on the chart.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eui.Chart.image.doySeries\u003c/code\u003e function is used to create this type of chart within the Google Earth Engine platform.\u003c/p\u003e\n"]]],["This function creates a chart from an ImageCollection, plotting derived band values for each day of the year. It reduces values within a specified region using `regionReducer` (defaulting to mean) and across years with `yearReducer` (also defaulting to mean). The x-axis represents the day of the year (from `startDay` to `endDay`), the y-axis represents the derived band values, and the series represents band names. Users provide an ImageCollection and optional region, reducers, scale, and day range.\n"],null,["# ui.Chart.image.doySeries\n\n\u003cbr /\u003e\n\nGenerates a Chart from an ImageCollection. Plots derived values of each band in a region for a each day of the year.\n\n\u003cbr /\u003e\n\n- X-axis: Day of year (startDay to endDay, defaults to 1 to 366).\n\n- Y-axis: Derived band value (reduced within the region and across years).\n\n- Series: Band names.\n\nReturns a chart.\n\n| Usage | Returns |\n|---------------------------------------------------------------------------------------------------------------------------------------|----------|\n| `ui.Chart.image.doySeries(imageCollection, `*region* `, `*regionReducer* `, `*scale* `, `*yearReducer* `, `*startDay* `, `*endDay*`)` | ui.Chart |\n\n| Argument | Type | Details |\n|-------------------|------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------|\n| `imageCollection` | ImageCollection | The ImageCollection to chart. |\n| `region` | Feature\\|FeatureCollection\\|Geometry, optional | The region to reduce. Defaults to the union of all geometries in the image collection. |\n| `regionReducer` | Reducer, optional | Reducer for aggregating band values within the region. Must return a single value. Defaults to ee.Reducer.mean(). |\n| `scale` | Number, optional | Scale to use with the region reducer in meters. |\n| `yearReducer` | Reducer, optional | Reducer for aggregating regionReducer outputs across years (for a given day). Must return a single value. Defaults to ee.Reducer.mean(). |\n| `startDay` | Number, optional | Day of year to start the series. Must be between 1 and 366. |\n| `endDay` | Number, optional | Day of year to end the series. Must be between startDay and 366. |"]]
