Overview. The trend chart represents a central component of the webLyzard dashboard, based on the selected data sources and time interval – with a default setting of two months, which can be changed using the date selector. Whenever a different combination of sources or topics is selected, dynamic transitions show how these changes affect the displayed data sets. Recently added features such as dynamic transitions, moving averages and data export increase the charts’ flexibility and make it easier to utilize the provided data in external applications.
The line chart shows the evolution of data indicators over time. The default view uses predefined topics as well as the current search. If the topic sidebar is switched to the drill-down view, the trend charts can be used to work with facets of the current search to visualize e.g. the language or source distribution over time. Hovering above data points displays tooltips with the top three associated keywords and daily statistics. This helps to identify emerging trends and shows what has caused a particular peak in the chart. Clicking data points retrieves the corresponding set of documents. The following data sets are available via separate tabs:
- Share of Voice is a relative measure of attention based on the number of topic mentions divided by the total number of documents published in a given week.
- Frequency (total, positive, negative) aggregates the number of occurrences in the last seven days. The global sentiment filter allows restricting the data set to either positive or negative online coverage.
- Sentiment (mean) shows the average sentiment towards a certain topic.
- Disagreement (standard deviation of sentiment) reflects how contested a topic is. The term ‘oil spill’, for example, has a low standard deviation since everyone agrees on its negative connotation.
Complementing the time series selection and moving average specification described above, the context menu allows activating additional diagrams such as the donut chart or radar chart.
- Donut Chart. This diagram is only available for frequency and sentiment data. It is synchronized with the topic management section and the line chart. Adaptive tooltips provide keywords per topic for frequency data, or the most important positive and negative associations with the chosen set of topics for sentiment data.
- Additional Features. The context menu of the trend chart offers an optional calculation of moving averages: If disabled, the charts present the raw data to reveal specific events. If enabled (available intervals: 7, 30 or 60 days), the focus of the analysis shifts to trend detection. Depending on the dashboard configuration, the contextual menu may offer additional features such as the WYSDOM success metric or the Brand Reputation Radar. The trend chart section can also be enlarged using the arrow button in the upper right corner.
The integrated export function allows retrieving the full data set consisting of daily frequency, sentiment, and disagreement values for the selected time interval in native MS Excel format, or as a comma-separated CSV file for various external applications – e.g., data warehouses, business intelligence tools, statistical packages such as R and SPSS, etc.