Hierarchical GP regression on the expression of three illustrative genes during Drosophila Melanogaster development, using eight replicates with different time sampling. Each row represents one gene. The leftmost panes show the inferred function g
(t), subsequent panes represent the replicates. Solid lines show the mean of the predicted function, and the shaded area represents the 95% confidence interval. The parameters of the covariance function were optimised by maximum likelihood. Note that the replicates contain different numbers of data and different times.