TransEntro {GrpString} | R Documentation |
TransEntro computes the overall transition entropy of all the strings in a group.
TransEntro(strings.vec)
strings.vec |
String Vector. |
Entropy is calculated using the Shannon entropy formula: -sum(freqs * log2(freqs)). Here, freqs are transition frequencies, which are the values in the normalized transition matrix exported by function TransMx in this package. The formula is equivalent to the function entropy.empirical in the 'entropy' package when unit is set to log2.
Returns a single number.
Strings with less than 2 characters are not included for computation of entropy.
I. Hooge; G. Camps. (2013) Scan path entropy and arrow plots: capturing scanning behavior of multiple observers. Frontiers in Psychology.
# simple strings
stra.vec <- c("ABCDdefABCDa", "def123DC", "A", "123aABCD", "ACD13", "AC1ABC", "3123fe")
TransEntro(stra.vec)