Lesson 6
Plotting Data
TOPICS
Waveform Charts
Waveform and XY Graphs
Intensity Graphs
1
Waveform Charts
Selected from the Controls»Graphs and Charts palette
2
Wiring to Charts
Single-Plot Chart
Multiple-Plot Chart
3
Modifying Chart Properties
• Change the
appearance
• Set the format and
precision of the axis
• Choose the plot type
• Edit the scales
• Document the chart
4
Customizing Charts and Graphs
Right-click and select Visible Items to view the following items:
• Plot Legend
• Digital Display
Graph Palette
• Scrollbar
Zoom Subpalette
• X and Y Scale
• Graph Palette
• Scale Legend
Scale Legend
5
Graphs
• Selected from the Graph subpalette
• Waveform Graph – Plot an array of numbers against their indices
• XY Graph – Plot one array against another
Plot Legend
(point and line
styles)
Scale Legend
6
Graph Palette
Single-Plot Waveform Graphs
Uniform X axis
Initial X = 0.0
Delta X = 1.0
Uniform X axis
you specify point
spacing
7
Multiple-Plot Waveform Graphs
Each row is a
separate plot:
Initial X = 0
Delta X = 1
Each row is a
separate plot:
Bundle specifies
point spacing of
the X axis
8
XY Graphs
• Non-uniform X axis
• Separate X and Y arrays
define data points
9
Chart and Graph Use Summary
Use the Context Help window with charts and graphs
10
Intensity Plots and Graphs
• Useful in displaying terrain, temperature patterns, spectrum analysis, and
image processing
• Data type is a 2D array of numbers; each number represents a color
• Use these options to set and display color mapping scheme
• Cursor also adds a third dimension
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Summary
• The waveform chart is a special numeric indicator that displays one
or more plots. The waveform chart has the following three update
modes:
–A strip chart shows running data continuously scrolling from left to
right across the chart.
–A scope chart shows one item of data, such as a pulse or wave,
scrolling partway across the chart from left to the right.
–A sweep works similarly to a scope except it shows the old data on
the right and the new data on the left separated by a vertical line.
• Waveform graphs and XY graphs display data from arrays.
• Right-click a waveform chart or graph or its components to set
attributes of the chart and its plots.
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Summary, cont.
• You can display more than one plot on a graph using the Build
Array function and the Bundle function for charts and XY graphs.
The graph becomes a multiplot graph when you wire the array of
outputs to the terminal.
• When you wire data to charts and graphs, use the Context Help
window to determine how to wire them.
• You can use intensity charts and graphs to plot three-dimensional
data. The third dimension is represented by different colors
corresponding to a color mapping that you define. Intensity charts
and graphs are commonly used in conjunction with spectrum
analysis, temperature display, and image processing.
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