search for: soil_carbon

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2010 Sep 16
0
problems trying to reproduce structural equation model using the sem package
.... The code to reproduce all steps is presented below. Thank you very much, Gustavo. ########## library(sem) grace <- matrix(ncol = 10, nrow = 10) variables <- c("lightlog", "light", "dstb", "species_count", "masslog", ? ? ? ? ? ? ? "soil_carbon", "soil_organic", "soil_low_flooding", ? ? ? ? ? ? ? "soil_high_flooding", "soil_salinity") rownames(grace) <- colnames(grace) <- variables diag(grace) <- 1 ## Coefficients from the paper. grace.coefficients <- c(0.858, 0.667, -0.251, -0....