matrixpls method for the standard generic function effects computes total, direct,
and indirect effects for a matrixpls results according to the method described in Fox (1980).Adapted from the effects function of the sem package
## S3 method for class 'matrixpls':
effects(object, ...)matrixpls function.Total, Direct, and Indirect elements.ave,
cr, fitSummary,
fitted.matrixpls, gof,
htmt, loadings.matrixpls,
predict.matrixpls, r2,
residuals.matrixpls