isd {agrmt} | R Documentation |
Classify changes over time using the ISD-system introduced by Galtung (1969).
isd(V, tolerance=0.1)
V |
A vector with length 3 |
tolerance |
Specify how similar values have to be to be treated as different (optional). Differences smaller than or equal to the tolerance are ignored. |
This function implements the ISD-system introduced by Galtung (1969). The input is a vector of length 3. Each value stands for a different point in time. The ISD-system examines the two transition points, and classifies the changes over time.
The function returns a list. The type
returns a number corresponding to the pattern described by Galtung. The description
returns a string where the two transitions are spelled out (increase, flat, decrease).
Didier Ruedin
Galtung, J. (1969) Theory and Methods of Social Research. Oslo: Universitetsforlaget.