Fig. 3From: Gaussian process emulation to improve efficiency of computationally intensive multidisease models: a practical tutorial with adaptable R codeGaussian posterior predictive distributions for (a) HIV, (b) Hypertension, (c) Comorbid HIV & Hypertension and (d) Depression prevalence The solid black lines represent the distribution of y ; the dashed red lines represent the y posterior predictive distribution and the dotted grey lines represent the distribution of simulations. The density values of the plots are different as generated by the system due to the differences in disease-specific prevalence values on the x-axisBack to article page