flowgini: Analysis of flow concentration (Gini coefficient)
In fbahoken/cartogRaflow: Filtering Matrix for Flow Mapping

Description Usage Arguments Details Value References Examples

Calculates Gini coefficient, plot Lorenz curve and threshold the matrice according to a global concentration criterion for mapping flow intensity or flow density.
To be use before flowanalysis

1	flowgini(ODpts, origin, destination, valflow, lorenz.plot)

`ODpts`	the input dataset with : nodes code, flow values and XY coordinates
`origin`	ID origin place, in long format
`destination`	ID destination place, long format
`valflow`	flow value between origin and destination places
`lorenz.plot`	to plot or the Lorenz curve. See Details

flowgini(...,lorenz.plot = TRUE) for ploting Lorenz curve associate to the gini coefficient, from cumulated flows and links.

plot Lorenz curve for the cumulated flow and links : flowgini(...,gini.plot = TRUE),warning : the function must be not assign a variable

value of the Gini's coefficent and the table : table<-flowgini(...,missing(gini.plot) or gini.plot = FALSE )

Bahoken Françoise, 2016,« La cartographie d’une sélection globale de flux, entre ‘significativité’ et ‘densité’ », Netcom Online, 30-3/4 | 2016, Online since 23 March 2017, connection on 05 May 2019. URL : http://journals.openedition.org/netcom/2565 ; DOI : 10.4000/netcom.2565.
Grasland Claude, 2014, "Flows analysis carto", unpublished R functions.

library(cartograflow)
data(flowdata)
# Computes Gini's coefficent
tabgini <- flowgini(ODpts = flows, origin = "i", destination = "j", 
                     valflow = "Fij", lorenz.plot = FALSE)
# Plot Lorenz curve
flowgini(ODpts = flows, origin = "i", dest = "j", valflow = "Fij", lorenz.plot = TRUE)
# See \link{flowanalysis} for viewing the tab_gini table