deleteSignals

Delete signals from EDF or EDF+ file

Since R2021a

Syntax

edfw = deleteSignals(edfw,signallabels)

edfw = deleteSignals(edfw)

Description

edfw = deleteSignals(edfw,signallabels) deletes the signals specified in signallabels from the European Data Format (EDF) or EDF+ file.

edfw = deleteSignals(edfw) deletes all the signals from the EDF or EDF+ file.

Examples

Delete Signal from EDF+ File

Load edfw.mat into the workspace. The edfwrite object contains electromyography (EMG) data [1] from eight different arm muscles. The data is available at www.sce.carleton.ca/faculty/chan/index.php?page=matlab. Display the number of signals and the signal labels.

load edfw
edfw.NumSignals

ans = 
8

edfw.SignalLabels

ans = 8x1 string
    "F1"
    "F2"
    "F3"
    "F4"
    "F5"
    "F6"
    "F7"
    "B1"

Delete signal B1 from edfw. Display the number of signals and the signal labels.

edfw = deleteSignals(edfw,"B1");
edfw.NumSignals

ans = 
7

edfw.SignalLabels

ans = 7x1 string
    "F1"
    "F2"
    "F3"
    "F4"
    "F5"
    "F6"
    "F7"

Input Arguments

edfw — EDF or EDF+ file

edfwrite object

EDF or EDF+ file, specified as an edfwrite object.

signallabels — Signal names

string vector

Signal names, specified as a string vector.

Data Types: string

Output Arguments

edfw — EDF or EDF+ file

edfwrite object

EDF or EDF+ file, returned as an edfwrite object.

Note

When a signal is deleted, the recording becomes discontinuous and the Reserved property of the EDF or EDF+ file is converted to EDF+D.

References

[1] Chan, Adrian D.C., and Geoffrey C. Green. 2007. "Myoelectric Control Development Toolbox". Paper presented at 30th Conference of the Canadian Medical & Biological Engineering Society, Toronto, Canada, 2007.

[2] Kemp, Bob, Alpo Värri, Agostinho C. Rosa, Kim D. Nielsen, and John Gade. “A Simple Format for Exchange of Digitized Polygraphic Recordings.” Electroencephalography and Clinical Neurophysiology 82, no. 5 (May 1992): 391–93. https://doi.org/10.1016/0013-4694(92)90009-7.

[3] Kemp, Bob, and Jesus Olivan. "European Data Format 'plus' (EDF+), an EDF Alike Standard Format for the Exchange of Physiological Data." Clinical Neurophysiology 114, no. 9 (2003): 1755–1761. https://doi.org/10.1016/S1388-2457(03)00123-8.

Version History

Introduced in R2021a