You can copy the contents of the Sample menu Talker Info dialog to the Clipboard or to the Log window.The GrdColWidth() script command can now return the grid view width in pixels so scripts can adjust column widths to fill the available space.The File Importer tries harder to cope with files with time-stamped data that is out of order and can now import some files that it previously rejected (albeit by ignoring/patching events).The Evaluate bar Eval() button can now cope with a wider range of expressions without generating an error.If a sampling configuration holds a graphical sequence with an error, the faulty sequence section is identified when the configuration loads rather than reporting a non-specific error.command to DACs 2 and 3 with a Micro4 without these DACs now gives a useful warning message, not "Unknown (1401) error code". Attempting to use the Sample menu Output Waveform.Using a sampling configuration with DACs 2 and 3 set for arbitrary waveform output with a Micro4 without DACs 2 and 3 now generates a diagnostic error message previously, sampling would fail to start with a non-specific error.You can show change marks in the script and output sequencer file text editor.The new MenuCommand() script command allows a script to activate a Spike2 menu command as if the user had selected it.Talkers remember the time drift rate from the last sample session to improve timing accuracy at the start of sampling.Spike2 can now launch Talkers required by a sampling configuration when it creates a new data file for sampling.There is a new Talker menu Run command to launch a Talker if Spike2 knows the location.Talkers can now inform Spike2 where they were run from and Spike2 now saves this information.Identifying the EMG activity epochs with comments (s: start, e: end). You can do this in LabChart by adding comments at the start and end of each region of interest.
One of the most accurate ways of quantifying EMG activity is to manually identify each epoch of activity. Taking the integral from the EMG data Channel. This is because LabChart can perform integral calculations on the absolute value (in addition to the standard, positive only, and negative only integrals). In LabChart you don't actually need to rectify your EMG signal to quantify EMG. Rectifying the Raw EMG data in Channel 3 using the absolute arithmetic function in LabChart. Computed Inputs are planned to be removed from future versions of LabChart as channel calculations are far more flexible.
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In contrast, channel calculations are software calculations that preserve the underlying raw data. For a Computed Input, LabChart acquires the computed signal directly from the PowerLab, meaning the raw data is lost and cannot be recovered. There are two ways of rectifying your raw EMG signal, using the Absolute Functions of a Computed Input or a Channel Calculation.
LabChart can do that by computing the integral of raw windowed EMG data and add it to the Data Pad for analysis, using Comments and Multiple Add to Data Pad features. Measuring area under the rectified EMG waveform is standard practice for quantifying myoelectric signals during muscle contraction.
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