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Charts and Graphs (G Dataflow)

Last Modified: November 28, 2016

Chart and plot data.

What Is the Difference Between Graphs and Charts?

You can collect data, usually in an array, and then plot the data to a graph. This process is similar to a spreadsheet that first stores the data and then generates a plot of it.

A chart appends new data points to those points already in the display to create a history. On a chart, you can see the current reading or measurement in context with data previously acquired.

Graph and Chart Components

To create a graph or chart, you should consider the following configurable components:

  • Data
  • Axes
  • Plots
  • Cursors
  • Legends
  • Style and Format

Deciding Which Graph or Chart to Use

Knowing what type of data you need to display determines the type of graph or chart you should use.

Control Accepted Data Types Display Examples When to Use
Graph Displays numeric, complex, X/Y, or point sample data contained in arrays and analog waveforms. Analog waveform data acquired at a constant rate. Use a graph for fast processes that acquire data continuously.
Chart Displays numeric data contained in arrays and analog waveforms. Analog waveform data acquired at a constant rate with a history, or buffer, of the data from previous updates. Use a chart for processes that require a cumulative history of incremental updates to be maintained.
Intensity Graph Displays 3D data on a 2D plot by using color to display the values of the third dimension. Patterned data, such as frequency of sound intensity. Use an intensity graph for 3D data.
Polar Graph Displays arrays of complex or point data composed of angle and radius values. Point data that represents microphone sensitivity. Use a polar graph for data best displayed on a continuous axis, such as rotating machinery.
Digital Graph Displays digital tables and digital waveforms. Digital lines and buses that represent a transistor-transistor logic (TTL) compatible signal. Use a digital graph when you work with timing diagrams or logic analyzers.

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