AI-generated Key Takeaways
-
ui.Chart.image.byClassgenerates a chart from an image, plotting derived band values in classified regions. -
The chart's x-axis represents the band name, the y-axis represents the band value, and the series represents the class label.
-
The function takes several arguments including the classified image, class band, optional region, reducer, scale, class labels, and x-labels.
-
It returns a
ui.Chartobject.
- X-axis = Band name (all bands except the class band are charted).
- Y-axis = Band value.
- Series = Class label.
Returns a chart.
| Usage | Returns |
|---|---|
ui.Chart.image.byClass(image, classBand, region
, reducer
, scale
, classLabels
, xLabels
)
|
ui.Chart |
| Argument | Type | Details |
|---|---|---|
image
|
Image | Classified image to derive band values from. |
classBand
|
Number|String | The class label band in this image. |
region
|
Feature|FeatureCollection|Geometry, optional | The region to reduce. If omitted, uses the entire image. |
reducer
|
Reducer, optional | Reducer that generates the value(s) for the y-axis. Must return a single value per band. Defaults to ee.Reducer.mean(). |
scale
|
Number, optional | Scale to use with the reducer in meters. |
classLabels
|
List.<String>|List<String>|Object, optional | A dictionary of labels used to identify classes in the series legend. If omitted, classes will be labeled with the value of classBand. |
xLabels
|
List<Object>, optional | A list of labels used to label bands on the xAxis. Must have one fewer elements than the number of image bands. If omitted, bands will be labeled with their names. If the labels are numeric (e.g. wavelengths), x-axis will be continuous. |
