Almost all of the information in an Eprime file comes in chunks of text
bracketed by the lines *** LogFrame Start *** and *** LogFrame
End ***. The exception is the header information which is bracketed by
*** Header Start *** and *** Header End ***.
extract_chunks(eprime_log)a character vector containing the lines of text from Eprime txt file
a list of character vectors, where each vector contains the lines of a log-frame
extract_chunks extracts the bracketed text, storing each log-frame of
text in a list. The lists also include some additional lines of text as
metadata: Eprime.FrameNumber and Eprime.Basename (the name of
the source file). The header log-frame also gets dummy lines:
Procedure: Header and Running: Header.
These character vectors of colon-separated lines are converted into proper
lists by FrameList(...).