サマリー
Line charts allow you to visualize change over a continuous range, such as time or distance. Visualizing change with a line chart allows for the overall trend to be displayed at once, and for multiple trends to be compared simultaneously.
説明
When creating a chart object, optional arguments for the class constructor must be specified using the argument name; they cannot be specified by argument position. See the Code Samples section for an example of how to specify arguments using keywords.
構文
Line (x, {y}, {splitCategory}, {multiSeriesDisplay}, {miniChartsPerRow}, {showPreviewChart}, {aggregation}, {timeIntervalUnits}, {timeIntervalSize}, {timeAggregationType}, {trimIncompleteTimeInterval}, {nullPolicy}, {rotated}, {title}, {description}, {xTitle}, {yTitle}, {dataSource}, {displaySize})| パラメーター | 説明 | データ タイプ |
x | The field name for the x-axis variable. The field must be a numeric or date field. | String |
y | The field name or names for the y-axis variables. The value must be a numeric field or a list of numeric fields. | String |
splitCategory | A categorical field that adds a separate series or line for each unique value in the field. | String |
multiSeriesDisplay | Specifies the display type for a line chart with multiple series.
| String |
miniChartsPerRow | The number of minicharts that will be shown per row. The number of rows will be determined by the total number of series divided by the miniChartsPerRow value. | Integer |
showPreviewChart | Specifies whether the preview chart will be displayed for grid charts.
(デフォルト値は次のとおりです False) | Boolean |
aggregation | Specifies the statistical calculation that is applied to values aggregated into each temporal bin.
| String |
timeIntervalUnits | Specifies the time unit that corresponds to the timeIntervalSize.
| String |
timeIntervalSize | The span of time that is binned or aggregated together. This argument must be used in conjunction with timeIntervalUnits. | String |
timeAggregationType | Specifies the time interval alignment type.
| String |
trimIncompleteTimeInterval | Specifies whether incomplete time intervals at the start or end of the data span (depending on the timeAggregationType value) are removed (trimmed) from the chart. Incomplete intervals on a chart can cause misleading results in which the period in question is underreported or overreported due to a different amount of time in the interval.
| String |
nullPolicy | Specifies how summarized bins returning a null value are displayed.
| String |
rotated | Specifies whether lines are displayed horizontally or vertically.
(デフォルト値は次のとおりです False) | Boolean |
title |
The title of the chart. The title text appears at the top of the chart view and is used as the label for the chart in the Contents pane. | String |
description | The description of the chart. The description text appears at the bottom of the chart view. | String |
xTitle | The title of the x-axis of the chart. | String |
yTitle | The title of the y-axis of the chart. | String |
dataSource | The data source of the chart. When a chart is exported using the exportToSVG method or displayed in an ArcGIS Notebook, the data source will be read and rendered on the chart. Valid data sources include the following:
| Object |
displaySize [displaySize,...] | The size of the chart when exported using the exportToSVG method or displayed in an ArcGIS Notebook. The value must be specified as a two-item list in which the first item is the width of the chart and the second item is the height of the chart. | List |
プロパティ
| プロパティ | 説明 | データ タイプ |
| aggregation (読み書き) | Specifies the statistical calculation that is applied to values aggregated into each temporal bin.
| String |
| dataSource (読み書き) | The data source of the chart. When a chart is exported using the exportToSVG method or displayed in an ArcGIS Notebook, the data source will be read and rendered on the chart. Valid data sources include the following:
| Object |
| description (読み書き) | The description of the chart. The description text appears at the bottom of the chart view. | String |
| displaySize (読み書き) | The size of the chart when exported using the exportToSVG method or displayed in an ArcGIS Notebook. The value must be specified as a two-item list in which the first item is the width of the chart and the second item is the height of the chart. | List |
| legend (読み書き) | The properties of the chart legend.
| Object |
| miniChartsPerRow (読み書き) | The number of minicharts that will be shown per row. The number of rows will be determined by the total number of series divided by the miniChartsPerRow value. | Integer |
| multiSeriesDisplay (読み書き) | Specifies the display type for a line chart with multiple series.
| String |
| nullPolicy (読み書き) | Specifies how summarized bins returning a null value are displayed.
| String |
| rotated (読み書き) | Specifies whether the chart will be displayed vertically or horizontally.
| Boolean |
| showPreviewChart (読み書き) | Specifies whether the preview chart will be displayed for grid charts.
| Boolean |
| splitCategory (読み書き) | A categorical field that adds a separate series or line for each unique value in the field. | String |
| theme (読み書き) | Specifies the name of the theme that is applied to the chart. | String |
| timeAggregationType (読み書き) | Specifies the time interval alignment type.
| String |
| timeIntervalSize (読み書き) | The span of time that is binned or aggregated together. The property must be used in conjunction with timeIntervalUnits. | String |
| timeIntervalUnits (読み書き) | Specifies the time unit that corresponds to the timeIntervalSize value.
| String |
| title (読み書き) | The title of the chart. The title text appears at the top of the chart view and is used as the label in the Contents pane on the List By Drawing Order tab | String |
| trimIncompleteTimeInterval (読み書き) | Specifies whether incomplete time intervals at the start or end of the data span (depending on the timeAggregationType value) are removed (trimmed) from the chart. Incomplete intervals on a chart can cause misleading results in which the period in question is underreported or overreported due to a different amount of time in the interval.
| String |
| type (読み取り専用) | The string value indicating the chart type. | String |
| x (読み書き) | The field name for the x-axis variable. The field must be a numeric or date field. | String |
| xAxis (読み書き) | Sets the properties of the x-axis.
| Object |
| y (読み書き) | The field name or names for the numeric field or fields. Provide a single field name or a list of field names. | String |
| yAxis (読み書き) | Sets the properties of the y-axis.
| Object |
.方法の概要
| 方法 | 説明 |
| addToLayer (layer_or_layerfile) | Adds the chart object to a layer or stand-alone table. |
| exportToSVG (path, width, height) | Exports the chart to SVG format. |
| updateChart () | Updates chart properties to sync changes between the object and the chart previously added to a layer. |
方法
addToLayer (layer_or_layerfile)
| パラメーター | 説明 | データ タイプ |
layer_or_layerfile | The chart will be added to the target object. The layer_or_layerfile argument can be a Layer or a Table object. | Object |
Often the final step after defining chart properties is to add the chart object to a layer or table using the addToLayer method.
Add a chart to an existing layer.
import arcpy
aprx = arcpy.mp.ArcGISProject("current")
map = aprx.listMaps()[0]
censusLayer = map.listLayers('Census Block Groups')[0]
# Add chart object to a layer
chart.addToLayer(censusLayer)exportToSVG (path, width, height)
| パラメーター | 説明 | データ タイプ |
path | The path where the chart will be exported in SVG format. | String |
width | The width of the output graphic. | Integer |
height | The height of the output graphic. | Integer |
In some cases, you may want to save the chart as a graphic that can be shared and viewed outside of ArcGIS Pro. Exporting to the SVG graphic format is beneficial, as the chart elements and text are stored as vector elements that can be independently modified in a vector graphics software. An SVG graphic can also be resized to any scale without pixelation or loss in quality.
Export a chart that has a project layer data source to an .svg file.
import arcpy
aprx = arcpy.mp.ArcGISProject('current')
censusLayer = aprx.listMaps()[0].listLayers('Census Block Groups')[0]
# Set data source of chart object to a layer within current project
chart.dataSource = censusLayer
# Save the chart to file with dimensions width=500, height=500
chart.exportToSVG('populationByState.svg', 500, 500)Export a chart that has a feature service data source to an .svg file.
featureServiceURL = r'https://services1.arcgis.com/hLJbHVT9ZrDIzK0I/arcgis/rest/services/CrimesChiTheft/FeatureServer/0'
# Set data source of chart object to a feature service URL
chart.dataSource = featureServiceURL
# Save the chart to file with dimensions width=800, height=600
chart.exportToSVG('theftsPerBeat.svg', 800, 600)updateChart ()
Often the final step after defining chart properties is to add the chart object to a layer using the addToLayer method.
To further modify the chart properties, you can modify the properties of the original chart instead of starting from scratch with a new chart. You can then use the updateChart method to synchronize any changes into the chart that was added to the layer. This will allow the changes you make to be presented in the Chart properties pane and chart view.
Use the updateChart method to synchronize chart property changes into a layer.
chart.addToLayer(myLayer)
# Further modification is necessary
chart.description = "Data from the U.S. Census Bureau"
chart.updateChart()コードのサンプル
Create a line chart and add it to a layer in the current project.
import arcpy
lyr = arcpy.mp.ArcGISProject("current").listMaps()[0].listLayers()[0]
chart = arcpy.charts.Line(x="date", y="aqi", aggregation="mean")
chart.addToLayer(lyr)