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  • Description
  • Computes standard deviation of EP (.p) files. The output is an EP file containing the standard deviation for each sample and each channel.

  • Usage
  • epsd

This program uses an interactive input.The questions are as follows (questions (program) are italic, answers (user) are bold):
Number of EP files ?
EP filename #1 (without extension) :
EP filename #2 (without extension) :
EP filename #3 (without extension) :
Name of output pem file containing standard deviation values (without extension) :

  • Fields of parameter file and example

  • Examples

  • Comments
    1. It should be noted that all the EP file name are entered without extension.
    2. All EP files should be compatible (in terms of number of channels and samples, number of pre-stimulus samples, sampling frequency) to the first EP file.
    3. Possible error messages:
    4. Incompatible epfile : p_xe[n]
      the file you just enter is not compatible with the previous ones. The 'n' indicates which field of the *.p header is wrong:
      - 1 the number of channel,
      - 2 the number of samples,
      - 3 the epoch duration,
      - 4 the number of pre-stimulus samples,
      - 5 the sampling period.

  • Current version
  • 1.02 31-01-2011

  • History
    • 1.00 14-11-2001 (BY) : 1st version.
    • 1.01 29-09-2010 (PEA) : updates to use cmake and free release of Elan.
    • 1.02 31-01-2011 (PEA) : removes static allocation for reading and writing EP files.

  • Files
  • $ELANPATH/bin/epsd

  • See also