The Legend tab is used to view the symbols on the chart. The Layer options pane contains the following functions: The Layer options button opens the Layer options pane.
#GRAPH PAPER MAKER TIME UNITS SERIES#
When you drag a date/time field onto your page, the Chart drop zone is replaced with the Time Series drop zone because a time series graph is the only chart type that can be created using a date/time field. Based on what the analyst sees in the grouped time series graph, he will recommend focusing the programming on reducing the number of larceny crimes in the city.
The other incident types, burglary, motor vehicle theft, and robbery, have relatively stable counts across the two-year time period, with the exception of a spike in burglaries in May 2015. The counts of larceny show a similar pattern to the ungrouped time series. The grouped time series graph above indicates that the majority of incidents were categorized as larceny. Subgrouping the time series graph by another field, such as the crime type, can give more insight into the effectiveness of the programs for different types of incidents. The analyst realizes that looking at a total number of incidents over the two years only tells part of the story. If the crime reduction programs occurred in those months, that would imply that the programs were effective, but only for a limited time. There is a decrease in incidents in February 20. The graph above shows peaks in incidents in the period from May 2014 to October 2014 and again from May 2015 to September 2015. The analyst uses a time series graph and compares the number of incidents over time to the timing of the crime reduction programs.
Time series graphs can answer questions about your data, such as How does the trend change over time? ExampleĪ crime analyst is studying crime trends in his city to determine if initiatives to reduce crime have been effective. Missing data is displayed with a dashed line. Because date and time information is continuous categorical data (expressed as a range of values), points are plotted along the x-axis and connected by a continuous line. Time series graphs can be used to visualize trends in counts or numerical values over time.
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