Figure 4.

Same as Figure 3 but for the performance of CapsNets in predicting heat waves and cold spells using both T2m and Z500 patterns. The shadings show $\pm 1$SD; the SD values are higher in the multivariate approach. In (c) and (d), the change of accuracies with the size of the training set is small for lead times of 1, 3, and 5 days (labels not shown).