Calculations, measurements, data extraction, application specific tools and more.
To experience a selection of LabChart's data analysis features, download this
rabbit ecg data file
(76 KB).
The file can be opened in LabChart or
LabChart Reader.
LabChart Reader is available as a free download.
Using the Marker Tool
You can make relative measurements of a waveform with respect to its position by dragging and locking the Marker at a
point of interest on the waveform. By moving the cursor along the waveform, on either side of the marker, you can measure
and display the relative time and amplitude at the cursor positions.
Watch the Marker Tool movie (956 KB).
Marker tool used for making relative measurements
Finding Data
The Find and Select feature allows you to quickly find specific points of interest within a data file. Set up your
required search and selection criteria and search any number of channels for:
- comments
- waveform peaks
- waveform troughs
- block boundaries
- maximum or minimum values
- and more
Watch the Find and Select movie (4.07 MB).
Analyzing Data with Data Pad
Online: Raw signals or calculated values from any channel can be logged into a table using the Data Pad.
You can automate the addition of values prior to recording by using the 'Timed Add to Data Pad' feature. This feature
periodically logs data to the Data Pad as it is recorded.
Offline: You can also select the data of interest after it has been recorded by simply choosing the 'Add to Data Pad' command.
The 'Multiple Add to Data Pad' feature can also repeatedly extract values from data already recorded.
Data Pad contents can be saved as a text file, Excel file (Win only) or can be copied to other programs. Using OLE you can also export
incoming values to Excel in real time.
Analysis options include:
Statistics - calculate the mean, SD, RMS, max and min value, time at max and min values and number of pointsSelection & Active Point - obtain the start time, end time, duration and number of pointsComments - list time or value of active points, comments and comment numbers or timesSlope - get the average slope value, max and min slope or time at max and min slopesIntegral - calculate time integrals online or offlineBlock Information - obtain the range, sample interval, block number, block duration, samples in block, start time, start date and sampling rateCyclic Measurements (Windows)/Cyclic Variables (Mac) - extract periodic parameters from waveforms including frequency, rate mean, min and max, 1/3 max + 2/3 min, height, integral, variance, max and min derivatives
Watch the Data Pad movie (2.62 MB).
Data Pad Window
OLE Linking with LabChart for Windows
Incoming or already recorded values can be exported using OLE client programs such as Excel and Word. The link from LabChart to Excel
can be made dependent so that any change to the data selection in LabChart will automatically update the values in Excel. OLE is available
from the LabChart View mode as well as from the Data Pad.
OLE allows data to be updated and acquired online or offline
into other software programs including Excel
Channel Calculations
These options let you apply calculations to channels of recorded data online or offline.
The following channel calculations are built into LabChart:
Arithmetic - apply equations to channels, including math equations, trigonometric functions, logarithmic functions, noise and filtering functions.Cyclic Measurements (Windows)/Cyclic Variables (Mac) - analyze periodic waveforms to derive functions such as rate, period and frequency as well as cyclic mean, maximum, minimum and height.Derivative - display the first derivative.Digital Filter - select from six online or offline filter types: low-pass, high-pass, notch, narrow band-pass, band-pass and band-stop.Integral - measure areas under waveforms.Shift - shift data backwards or forwards in time.Smoothing - remove unwanted high frequencies and noise from a waveform.
Watch the Channel calculations movie (3.68 MB).
Channel calculations use the raw data from channel 1 to calculate heart rate, systolic, diastolic
and mean pressure in other channelsCyclic Measurements (Windows)/Cyclic Variables (Mac)
Cyclic Measurements allows processing of periodic waveform signals, online or offline, converting raw data from one channel to computed data displayed in another.
The following calculations are available:
Rate - calculate rates e.g. heart rate from ECG.Period - measure time taken to complete a cycle.Frequency - calculate event frequencies.Mean - derive the mean of a cyclic waveform.Min, Max, 1/3 Max + 2/3 Min - use these, for example, to calculate the diastolic, systolic and mean BP from an arterial BP trace.Height - calculate maximums minus minimum height.Integral - measure areas under waveforms.Variance - detect variance of values within a given cycle of a waveform.Min and Max Derivative - calculate minimum and maximum derivatives in a given cycle of a waveform.Unit Spike at Events - place markers on a second channel where a peak occurs on the input channel.
Watch the Cyclic Measurements movie (3.82 MB).
Cyclic Measurements allow for online and offline analysis of waveforms.
LabChart Modules for Advanced Analysis
LabChart Modules provide specialized data acquisition and analysis features for specific applications.
See the LabChart Modules page for more information, and visit our multimedia page to watch movies detailing the features of several Modules.
Watch the LabChart Modules and Extensions movie.
ECG Module's Averaging View 
Spike Histogram Module's Discriminator Window Like to see how LabChart could fuel your research and teaching? Register for an obligation-free demonstration in 2008,
and you'll enter the LabChart Platinum Draw, and be eligible
for giveaways including iPods, a laptop, PowerLab, and LabChart Pro software.
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