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Table 2 Highest values of phi coefficients demonstrating correlation between Aedes aegypti geographic distribution and threshold temperatures. The temperature assumption is estimated following the criteria mentioned in Methods. The interval of temperature assumption is 0.1 °C

From: Critical low temperature for the survival of Aedes aegypti in Taiwan

Interpolation techniques   Land surface night temperature (°C)
Minimum Mean Maximum
Inverse distance weighting Threshold temperature 13.5 13.8 14.0
The highest value of phi coefficient 0.68 0.71 0.69
Local polynomial interpolation: exponential kernel function Threshold temperature 13.8 13.8 13.9
The highest value of phi coefficient 0.70 0.68 0.67
Radial basis function: completely regularized spline Threshold temperature 13.4 13.8 14.1
The highest value of phi coefficient 0.67 0.69 0.70
Ordinary kriging: spherical type Threshold temperature 13.7 13.8 14.0
The highest value of phi coefficient 0.71 0.69 0.71