lagPlot function

Plot of lag shapes

A pathwise or an overall causal lag shape is displayed.

lagPlot(x, from = NULL, to = NULL, path = NULL, maxlag = NULL, cumul = FALSE,
  conf = 0.95, use.ns = FALSE, ylim = NULL, title = NULL)

Arguments

• x: An object of class dlsem.
• from, to, path: To display the overall causal lag shape of a variable to another one, their names must be provided to arguments from and to, respectively. To display a pathwise causal lag shape, the name of the path, indicated as a string made of the names of the variables in the path separated by '*', must be provided to argument path. Argument path will be ignored if both from and to are not NULL.
• maxlag: The maximum lag displayed (optional).
• cumul: Logical. If TRUE, cumulative causal effects are returned. Default is FALSE.
• conf: The confidence level for each edge: only statistically significant edges at such confidence are considered. Default is 0.95.
• use.ns: A logical value indicating whether not statistically significant edges (at level conf) should be considered or not. If FALSE (the default), they will be ignored.
• ylim: A vector of two numerical values indicating the limits of the y axis (optional). If NULL, the limits of the y axis are computed automatically.
• title: The title of the plot (optional). If NULL, a default title is used.

Note

Value NULL is returned if one of the following occurs: (i) no significant path at confidence level conf exists connecting the starting variables to the ending variable; (ii) the requested path does not exist or is not significant at confidence level conf.

See Also

dlsem ; lagShapes ; causalEff .

Examples

data(industry)
indus.code <- list(
  Consum~ecq(Job,0,5),
  Pollution~ecq(Job,1,8)+ecq(Consum,1,7)
  )
indus.mod <- dlsem(indus.code,group="Region",exogenous=c("Population","GDP"),data=industry,
  log=TRUE)

# the lag shape of the causal effect associated to specific paths
lagPlot(indus.mod,path="Job*Pollution")
lagPlot(indus.mod,path="Job*Consum*Pollution")

# the lag shape of an overall causal effect
lagPlot(indus.mod,from="Job",to="Pollution")