Figure 3
From: Using Baidu Search Index to Predict Dengue Outbreak in China
Cross-correlation between DF incidence rates and Baidu search query data.
(a) The cross-correlation between DF incidence rate and Baidu search data in Guangzhou from 2010 to 2014; (b) The cross-correlation between DF incidence rate and Baidu search data in Zhongshan from 2010 to 2014. CCF: Cross-Correlation Function; The two dashed lines illustrate critical values for cross-correlation (at the 5% level).
