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ui.Chart.image.doySeries
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
從 ImageCollection 產生圖表。繪製區域中每個波段在一年中每一天的衍生值。
- X 軸：一年中的第幾天 (startDay 到 endDay，預設為 1 到 366)。
- Y 軸：衍生頻帶值 (在區域內和跨年度減少)。
- 系列：樂團名稱。
傳回圖表。
| 用量 | 傳回 |
|---|
ui.Chart.image.doySeries(imageCollection, region, regionReducer, scale, yearReducer, startDay, endDay) | ui.Chart |
| 引數 | 類型 | 詳細資料 |
|---|
imageCollection | ImageCollection | 要繪製圖表的 ImageCollection。 |
region | Feature|FeatureCollection|Geometry，選填 | 要縮減的區域。預設為圖像集合中所有幾何圖形的聯集。 |
regionReducer | 縮減函式 (選用) | Reducer，用於匯總區域內的頻帶值。必須傳回單一值。預設為 ee.Reducer.mean()。 |
scale | 號碼 (選填) | 以公尺為單位，縮放至與區域縮減器搭配使用。 |
yearReducer | 縮減函式 (選用) | Reducer，用於彙整各年度的 regionReducer 輸出內容 (適用於特定日期)。必須傳回單一值。預設為 ee.Reducer.mean()。 |
startDay | 號碼 (選填) | 系列開始的年份日期。必須介於 1 至 366 之間。 |
endDay | 號碼 (選填) | 系列活動的結束日期 (以一年中的第幾天表示)。必須介於 startDay 和 366 之間。 |
除非另有註明，否則本頁面中的內容是採用創用 CC 姓名標示 4.0 授權，程式碼範例則為阿帕契 2.0 授權。詳情請參閱《Google Developers 網站政策》。Java 是 Oracle 和/或其關聯企業的註冊商標。
上次更新時間：2025-07-26 (世界標準時間)。
[null,null,["上次更新時間：2025-07-26 (世界標準時間)。"],[[["\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. |"]]
