zcurve | R Documentation |
Create a curve comparing observed Z-scores to the WHO standard.
zcurve(x, zscore)
x |
a data frame |
zscore |
bare name of a numeric vector containing computed zscores |
a ggplot2 object that is customisable via the ggplot2 package.
library("ggplot2") set.seed(9) dat <- data.frame(observed = rnorm(204) + runif(1), skewed = rnorm(204) + runif(1, 0.5) ) # slightly skewed zcurve(dat, observed) + labs(title = "Weight-for-Height Z-scores") + theme_classic() zcurve(dat, skewed) + labs(title = "Weight-for-Height Z-scores") + theme_classic() # Including different groups to facet dat <- data.frame( observed = c(rnorm(204) + runif(1), rnorm(204) + runif(1, 0.5)), groups = rep(c("A", "B"), each = 204), treat = sample(c('up', 'down'), 408, replace = TRUE) ) zcurve(dat, observed) + facet_grid(treat~groups)
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