Graph (arcpy)

Summary

The Graph class helps you in creating graphs of different types. Also, you can specify general graph properties such as the title, graph axes, and legend information.

Discussion

Graphs assist you in presenting information about map features and the relationship between them in a visual, easy-to-understand manner. Graphs may also be created for nonspatial tabular data and can show both additional information about the features on the map or the same information in a different way. Graphs are complementary to maps in that they simply and visually convey information that would generally be summarized numerically or explored from tables. With a graph, it is easy to quickly compare features to gain insight into the functional relationship between the features and thereby visualize the distribution, trends, and patterns in the data that would otherwise be difficult to see.

Properties

Property	Explanation	Data Type
graphAxis (Read and Write)	Sets the title of the axes (Left, Right, Bottom, and Top) of the graph. graphAxis property Description aType The type of graph property, which is applied to the graph irrespective of the number or type of series in the graph. The graphAxis property is a general graph property. Left Title of the left axis of the graph. For example, you can specify the title of the left axis by setting graphAxis[0] to "Left Axis". Right Title of the right axis of the graph. For example, you can specify the title of the right axis by setting graphAxis[1] to "Right Axis". Bottom Title of the bottom axis of the graph. For example, you can specify the title of the bottom axis by setting graphAxis[2] to "Bottom Axis". Top Title of the top axis of the graph. For example, you can specify the title of the top axis by setting graphAxis[3] to "Top Axis".	Object
graphPropsGeneral (Read and Write)	Sets the general properties, such as the title, subtitle, and footer, of the graph. graphPropsGeneral property Description aType The type of graph property, which is applied to the graph irrespective of the number or type of series in the graph. The graphPropsGeneral property is a general graph property. footer Specify the text that appears in the footer of the graph. subtitle Specify the text that appears in the subtitle of the graph. title Specify the text that appears in the title of the graph.	Object
graphPropsLegend (Read and Write)	Set the title of the legend in the graph. graphPropsLegend property Description aType The type of graph property, which is applied to the graph irrespective of the number or type of series in the graph. The graphPropsLegend property is a general graph property. title Specify the text that appears in the title of the legend in the graph.	Object
graphSeries (Read and Write)	Get the graph series associated with the graph. When you have multiple series in a graph, you can get information about the individual series.	Object

Method Overview

Method	Explanation
addSeriesAreaHorizontal (dataSrc, fieldX, {fieldY}, {fieldLabel}, {sortType})	Creates a new Horizontal Area series that can be added to the graph. Learn more about Horizontal Area graphs
addSeriesAreaVertical (dataSrc, fieldY, {fieldX}, {fieldLabel}, {sortType})	Creates a new Vertical Area series that can be added to the graph. Learn more about Vertical Area graphs
addSeriesBarHorizontal (dataSrc, fieldX, {fieldY}, {fieldLabel}, {sortType})	Creates a new Horizontal Bar series that can be added to the graph. Learn more about Horizontal Bar graphs
addSeriesBarMinMax (dataSrc, fieldYMax, fieldYMin, {fieldX}, {fieldLabel}, {sortType})	Creates a new Bar Min and Max series that can be added to the graph. Learn more about Bar Min and Max graphs
addSeriesBarVertical (dataSrc, fieldY, {fieldX}, {fieldLabel}, {sortType})	Creates a new Vertical Bar series that can be added to the graph. Learn more about Vertical Bar graphs
addSeriesBoxPlot (dataSrc, fieldValue)	Creates a new Box Plot series that can be added to the graph. Learn more about Box Plot graphs
addSeriesBubble (dataSrc, fieldRadius, fieldY, {fieldX}, {fieldLabel})	Creates a new Bubble series that can be added to the graph. Learn more about Bubble graphs
addSeriesHistogram (dataSrc, fieldValue, countBin)	Creates a new Histogram series that can be added to the graph. Learn more about Histogram graphs
addSeriesLineHorizontal (dataSrc, fieldX, {fieldY}, {fieldLabel}, {sortType})	Creates a new Horizontal Line series that can be added to the graph. Learn more about Horizontal Line graphs
addSeriesLineVertical (dataSrc, fieldY, {fieldX}, {fieldLabel}, {sortType})	Creates a new Vertical Line series that can be added to the graph. Learn more about Vertical Line graphs
addSeriesPie (dataSrc, fieldValue, fieldSort, {fieldLabel}, {sortType})	Creates a new Pie series that can be added to the graph. Learn more about Pie graphs
addSeriesPolar (dataSrc, fieldRadius, {fieldAngle}, {fieldLabel})	Creates a new Polar series that can be added to the graph. Learn more about Polar graphs
addSeriesScatterPlot (dataSrc, fieldY, {fieldX}, {fieldLabel})	Creates a new Scatterplot series that can be added to the graph. Learn more about Scatterplot graphs

Methods

addSeriesAreaHorizontal (dataSrc, fieldX, {fieldY}, {fieldLabel}, {sortType})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldX	The attribute field that will be used to plot value along the X-axis of the Horizontal Area graph.	Field
fieldY	The attribute field that will be used to plot value along the Y-axis of the Horizontal Area graph.	Field
fieldLabel	The attribute field that will be used to plot labels for data points along the horizontal area in the graph.	Field
sortType	Specify how the data values in the attribute field used for defining the Y-axis will be sorted. VALUE —Sort the data values based on the order of values in the input layer or table. This is the default. ASC —Sort the data values in ascending order (lowest to highest). DESC —Sort the data values in descending order (highest to lowest).	String

addSeriesAreaVertical (dataSrc, fieldY, {fieldX}, {fieldLabel}, {sortType})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldY	The attribute field that will be used to plot value along the Y-axis of the Vertical Area graph.	Field
fieldX	The attribute field that will be used to plot value along the X-axis of the Vertical Area graph.	Field
fieldLabel	The attribute field that will be used to plot labels for data points along the vertical area in the graph.	Field
sortType	Specify how the data values in the attribute field used for defining the X-axis will be sorted. VALUE —Sort the data values based on the order of values in the input layer or table. This is the default. ASC —Sort the data values in ascending order (lowest to highest). DESC —Sort the data values in descending order (highest to lowest).	String

addSeriesBarHorizontal (dataSrc, fieldX, {fieldY}, {fieldLabel}, {sortType})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldX	The attribute field that will be used to plot value along the X-axis of the Horizontal Bar graph.	Field
fieldY	The attribute field that will be used to plot value along the Y-axis of the Horizontal Bar graph.	Field
fieldLabel	The attribute field that will be used to plot labels for data points along the horizontal bars in the graph.	Field
sortType	Specify how the data values in the attribute field used for defining the Y-axis will be sorted. VALUE —Sort the data values based on the order of values in the input layer or table. This is the default. ASC —Sort the data values in ascending order (lowest to highest). DESC —Sort the data values in descending order (highest to lowest).	String

addSeriesBarMinMax (dataSrc, fieldYMax, fieldYMin, {fieldX}, {fieldLabel}, {sortType})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldYMax	The attribute field that will be used to plot the maximum value along the Y-axis of the Bar Min and Max graph.	Field
fieldYMin	The attribute field that will be used to plot the minimum value along the Y-axis of the Bar Min and Max graph.	Field
fieldX	The attribute field that will be used to plot value along the X-axis of the Bar Min and Max graph.	Field
fieldLabel	The attribute field that will be used to plot labels for data points along the bars in the graph.	Field
sortType	Specify how the data values in the attribute field used for defining the X-axis will be sorted. VALUE —Sort the data values based on the order of values in the input layer or table. This is the default. ASC —Sort the data values in ascending order (lowest to highest). DESC —Sort the data values in descending order (highest to lowest).	String

addSeriesBarVertical (dataSrc, fieldY, {fieldX}, {fieldLabel}, {sortType})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldY	The attribute field that will be used to plot values along the Y-axis of the Vertical Bar graph.	Field
fieldX	The attribute field that will be used to plot values along the X-axis of the Vertical Bar graph.	Field
fieldLabel	The attribute field that will be used to plot labels for data points along the vertical bars in the graph.	Field
sortType	Specify how the data values in the attribute field used for defining the X-axis will be sorted. VALUE —Sort the data values based on the order of values in the input layer or table. This is the default. ASC —Sort the data values in ascending order (lowest to highest). DESC —Sort the data values in descending order (highest to lowest).	String

addSeriesBoxPlot (dataSrc, fieldValue)

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldValue	The attribute field used for plotting the values in the Box Plot graph.	Field

addSeriesBubble (dataSrc, fieldRadius, fieldY, {fieldX}, {fieldLabel})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldRadius	The attribute field that defines the radius of the bubbles in the Bubble graph.	Field
fieldY	The attribute field that will be used to plot values along the Y-axis of the Bubble graph.	Field
fieldX	The attribute field that will be used to plot values along the X-axis of the Bubble graph.	Field
fieldLabel	The attribute field that will be used to plot labels for data points in the graph.	Field

addSeriesHistogram (dataSrc, fieldValue, countBin)

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldValue	The attribute field used for displaying the frequency distribution in the bins of the histogram. The height of the bars in a Histogram represent a frequency count of the number of items falling into each bin.	Field
countBin	The number of bins in the histogram.	Integer

addSeriesLineHorizontal (dataSrc, fieldX, {fieldY}, {fieldLabel}, {sortType})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldX	The attribute field that will be used to plot value along the X-axis of the Horizontal Line graph.	Field
fieldY	The attribute field that will be used to plot value along the Y-axis of the Horizontal Line graph.	Field
fieldLabel	The attribute field that will be used to plot labels for data points along the horizontal line in the graph.	Field
sortType	Specify how the data values in the attribute field used for defining the Y-axis will be sorted. VALUE —Sort the data values based on the order of values in the input layer or table. This is the default. ASC —Sort the data values in ascending order (lowest to highest). DESC —Sort the data values in descending order (highest to lowest).	String

addSeriesLineVertical (dataSrc, fieldY, {fieldX}, {fieldLabel}, {sortType})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldY	The attribute field that will be used to plot value along the Y-axis of the Vertical Line graph.	Field
fieldX	The attribute field that will be used to plot value along the X-axis of the Vertical Line graph.	Field
fieldLabel	The attribute field that will be used to plot labels for data points along the vertical line in the graph.	Field
sortType	Specify how the data values in the attribute field used for defining the X-axis will be sorted. VALUE —Sort the data values based on the order of values in the input layer or table. This is the default. ASC —Sort the data values in ascending order (lowest to highest). DESC —Sort the data values in descending order (highest to lowest).	String

addSeriesPie (dataSrc, fieldValue, fieldSort, {fieldLabel}, {sortType})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldValue	The attribute field that will be used to plot values or wedges in the Pie graph.	Field
fieldSort	The attribute field that will be used to sort the wedges in an ascending or descending order.	Field
fieldLabel	The attribute field that will be used to plot labels in the Pie graph.	Field
sortType	Specify how the data values will be sorted in the attribute field used for sorting. ASC —Sort the data values in ascending order (lowest to highest). This is the default. DESC —Sort the data values in descending order (highest to lowest).	String

addSeriesPolar (dataSrc, fieldRadius, {fieldAngle}, {fieldLabel})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldRadius	The attribute field whose values are graphed on the radial axis of the Polar graph.	Field
fieldAngle	The attribute field that supplies the angular position for each data point in the Polar graph.	Field
fieldLabel	The attribute field that will be used to plot labels representing data values on the graph.	Field

addSeriesScatterPlot (dataSrc, fieldY, {fieldX}, {fieldLabel})

Parameter	Explanation	Data Type
dataSrc	The layer or table containing the data values that will be used to create the graph.	Layer
fieldY	The attribute field that will be used to plot values along the Y-axis of the Scatterplot graph.	Field
fieldX	The attribute field that will be used to plot values along the X-axis of the Scatterplot graph.	Field
fieldLabel	The attribute field that will be used to plot labels for data points in the graph.	Field

Code Sample

Graph example

The following script creates a Vertical Bar graph and saves it as an image.

import arcpy

out_graph_name = "VerticalBarGraph"
out_graph_bmp = "c:/temp/VerticalBarGraph.bmp"
input_template = "c:/data/makegraph/VerticalBar.tee"
input_data = "c:/data/makegraph/Rainfall.gdb/Rainfall"

# Create the graph
graph = arcpy.Graph()

# Add a vertical bar series to the graph
graph.addSeriesBarVertical(input_data, "Rainfall_Stations_OBJECTID")

# Specify the title of the left axis
graph.graphAxis[0] = "Rainfall"

# Specify the title of the bottom axis
graph.graphAxis[2] = "Days"

# Specify the title of the Graph
graph.graphPropsGeneral.title = "Amount of Rainfall"

# Output a graph, which is created in-memory
arcpy.MakeGraph_management(input_template, graph, out_graph_name)

# Save the graph as an image
arcpy.SaveGraph_management(out_graph_name, out_graph_bmp,
                           "MAINTAIN_ASPECT_RATIO", 600, 375)