This document discusses graphs and waveforms. It describes different types of waveforms and the difference between graphs and charts. It provides examples of how to create waveform charts and graphs in LabVIEW, including how to acquire and plot data, create arrays, and perform file input/output. The document also covers printing and documenting LabVIEW VIs.

1. GRAPHS AND WAVE FORMS
Dr.(Mrs.) Anjali Potnis
NITTTR,Bhopal

2. SESSION OBJECTIVE
 Understanding the chart and graph .
 Generating and Plotting different waveforms.
 Analyzing the waveform .
 Print and Documentation

3. TYPES OF WAVEFORMS
 Waveform graphs and charts
 XY graphs
 Intensity graphs and charts
 Digital waveform graphs
 Windows 3D Graphs

4.  Single and multiple trace
 Basic structures used for the plotting of
data are arrys, Clusters and bundles .

5. DIFFERENCE BETWEEN GRAPHS AND CHARTS
 Charts:- Charts interactively plot data,
appending new data to old so the current
value can be append to the old in the context
of previous data.
 Graphs:- Graphs plots pre- generated arrays
of values without retaining previously
generated data.
 In both the case data is acquired at a
constant rate.

6. WAVEFORM CHARTS
Waveform chart – special
numeric indicator that can
display a history of values
Controls >> Graph Indicators
>> Waveform Chart

7. GRAPHS
 Selected from the Graph palette of Controls
menu
Controls>>All Controls>>Graphs
Waveform Graph – Plot an array of
numbers against their indices
Express XY Graph – Plot one array against
another
Digital Waveform Graph – Plot bits from
binary data

8. EXAMPLE

9. WIRING DATA INTO CHARTS
Single Plot Charts Multiplot Charts
Functions >> Signal
Manipulation >>Merge Signal

10. EXERCISE – USING WAVEFORM GRAPHS

11. WIRING DATA INTO CHARTS
Single Plot Charts Multiplot Charts

12. WAVEFORM CHART
 It is a special numeric indicator that display
one or more plots.
 Waveform chart types are as follows
Strip chart
Scope chart
Sweep chart

13. WAVEFORM CHART USING WHILE LOOP

14. WAVEFORM GRAPHS
 Waveform Graphs and XY graphs are
displayed data from an array .
 Build array function is used for the multiple
data display.

15.  Display of Single and Multiple plots on a
Waveform Graphs
 Display of Single and Multiple plots on a
Waveform Charts

16. CREATE A GRAPH USING FORMULA EDITOR

17. ARRAYS & FILE I/O
 Build arrays manually
 Have LabVIEW build arrays automatically
 Write to a spreadsheet file
 Read from a spreadsheet file

18. CREATING 2D ARRAYS

20. FILE I/O
File I/O – passing data to and from files
- Files can be binary, text, or spreadsheet
- Write/Read LabVIEW Measurements file (*.lvm)
Writing to LVM file Reading from LVM file

21. WRITE LABVIEW MEASUREMENT FILE
 Includes the open, write, close and error handling
functions
 Handles formatting the string with either a tab or
comma delimiter
 Merge Signals function is used to combine data into
the dynamic data type

22. USING WAVEFORM GRAPHS

23. PRINTING & DOCUMENTATION
 Print From File Menu to Printer, HTML, Rich
Text File
 Programmatically Print Graphs or Front
Panel Images
 Document VIs in VI Properties »
Documentation Dialog
 Add Comments Using Free Labels on Front
Panel & Block Diagram

24. PRINTING
 File » Print… Gives Many Printing Options
 Choose to Print Icon, Front Panel, Block Diagram, VI
Hierarchy, Included SubVIs, VI History
 Print Panel.vi (Programmatically Prints a Front
Panel)
 Functions » All Functions » Application Control
 Generate & Print Reports (Functions » Output »
Report)

25. DOCUMENTING VIS
 VI Properties » Documentation
 Provide a Description and Help Information for a
VI
 VI Properties » Revision History
 Track Changes Between Versions of a VI
 Individual Controls » Description and Tip…
 Right Click to Provide Description and Tip Strip
 Use Labeling Tool to Document Front
Panels & Block Diagrams

26. PRACTICE SESSION

28. EXAMPLE FUNCTION GENERATOR

31. DECIMAL TO BINARY CONVERSION