Figure 3.

Estimates for the coefficients $b_{ij}$ of the linear terms $g_{ij}(x_{A_i})=x_{A_i}^j$ that are found to feature in the emulators for total deaths in England for the first iteration/wave of runs, where $i$ labels the time point ($x$-axis) and $j$ labels the inputs ($y$-axis). Red/blue represents positive/negative dependencies of $f_i(x)$ on that input, respectively, standardized as proportions of the largest coefficient for that time point. A finer temporal resolution is used here for added clarity. Note that this plot shows the time-dependent sensitivity of the model to the inputs, but that the actual inputs $x$ do not vary over time. (Online version in colour.)