Table 4.
Principal components (PC) and its explained variance (σ2) from individual and all cities considering meteorological variables and evolution of Covid-19 in the Brazilian cities.
| Statistics | Eigenvalue | Eigenvectors |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Temperature |
Relative Humidity |
Rain | NDC | Cum. cases | Cont. rate | ||||||
| Mean | Max | Min | Mean | Max | Min | ||||||
| Manaus | |||||||||||
| PC 1 | 2.43 | 0.39 | 0.35 | 0.32 | −0.39 | −0.33 | −0.31 | −0.25 | −0.18 | −0.29 | −0.29 |
| σ2 (%) | 59.1 | 15.5 | 12.1 | 10.1 | 15.0 | 10.9 | 9.8 | 6.4 | 3.3 | 8.5 | 8.5 |
| PC 2 | 1.42 | 0.09 | 0.27 | 0.07 | −0.12 | 0.14 | −0.35 | −0.35 | 0.49 | 0.45 | 0.45 |
| σ2 (%) | 20.3 | 0.7 | 7.4 | 0.5 | 1.4 | 2.0 | 12.3 | 12.0 | 24.0 | 19.8 | 19.8 |
| Fortaleza | |||||||||||
| PC 1 | 2.19 | 0.39 | 0.40 | 0.27 | −0.43 | −0.27 | −0.41 | −0.37 | −0.04 | −0.16 | −0.16 |
| σ2 (%) | 48.1 | 15.2 | 16.1 | 7.2 | 18.9 | 7.2 | 16.4 | 13.8 | 0.1 | 2.6 | 2.6 |
| PC 2 | 1.64 | 0.23 | 0.11 | 0.13 | −0.07 | −0.10 | −0.02 | 0.10 | 0.52 | 0.56 | 0.56 |
| σ2 (%) | 26.8 | 5.4 | 1.3 | 1.6 | 0.5 | 1.0 | 0.0 | 1.0 | 27.5 | 30.9 | 30.8 |
| Brasília | |||||||||||
| PC 1 | 2.13 | 0.45 | 0.43 | 0.03 | −0.43 | −0.29 | −0.44 | −0.34 | 0.11 | 0.11 | 0.11 |
| σ2 (%) | 45.2 | 20.2 | 18.5 | 0.1 | 18.8 | 8.3 | 19.3 | 11.3 | 1.1 | 1.2 | 1.2 |
| PC 2 | 1.52 | 0.03 | −0.05 | 0.10 | −0.16 | −0.34 | −0.01 | −0.03 | −0.35 | −0.60 | −0.60 |
| σ2 (%) | 23.2 | 0.1 | 0.3 | 1.0 | 2.4 | 11.3 | 0.0 | 0.1 | 12.3 | 36.2 | 36.2 |
| Rio de Janeiro | |||||||||||
| PC 1 | 2.22 | 0.42 | 0.40 | 0.39 | −0.14 | −0.06 | −0.24 | −0.12 | −0.35 | −0.38 | −0.38 |
| σ2 (%) | 49.4 | 17.9 | 16.0 | 15.1 | 2.0 | 0.3 | 5.6 | 1.4 | 12.3 | 14.7 | 14.7 |
| PC 2 | 1.71 | 0.00 | −0.08 | 0.06 | 0.54 | 0.50 | 0.43 | 0.33 | −0.22 | −0.23 | −0.23 |
| σ2 (%) | 29.1 | 0.0 | 0.6 | 0.4 | 28.9 | 24.7 | 18.9 | 11.1 | 4.7 | 5.3 | 5.3 |
| São Paulo | |||||||||||
| PC 1 | 2.07 | 0.44 | 0.42 | 0.39 | −0.10 | 0.02 | −0.17 | 0.15 | −0.29 | −0.41 | −0.41 |
| σ2 (%) | 42.8 | 19.4 | 17.3 | 15.3 | 1.0 | 0.0 | 2.9 | 2.3 | 8.2 | 16.7 | 16.7 |
| PC 2 | 1.58 | 0.09 | 0.21 | −0.13 | −0.59 | −0.40 | −0.48 | −0.34 | 0.01 | 0.19 | 0.19 |
| σ2 (%) | 25.1 | 0.9 | 4.6 | 1.8 | 34.7 | 16.1 | 23.1 | 11.4 | 0.0 | 3.7 | 3.7 |
| All cities | |||||||||||
| PC 1 | 1.95 | 0.45 | 0.44 | 0.41 | −0.26 | −0.26 | −0.12 | −0.05 | −0.32 | −0.38 | −0.20 |
| σ2 (%) | 38.2 | 20.6 | 19.4 | 16.7 | 6.7 | 6.5 | 1.3 | 0.3 | 10.4 | 14.1 | 4.0 |
| PC 2 | 1.46 | 0.10 | −0.06 | 0.23 | 0.54 | 0.19 | 0.52 | 0.48 | −0.19 | −0.24 | −0.08 |
| σ2 (%) | 21.4 | 0.9 | 0.4 | 5.1 | 29.6 | 3.8 | 27.5 | 22.6 | 3.6 | 5.9 | 0.6 |
| PC 3 | 1.28 | 0.31 | 0.17 | 0.36 | 0.04 | −0.22 | 0.19 | 0.06 | 0.37 | 0.38 | 0.61 |
| σ2 (%) | 16.4 | 9.6 | 2.8 | 13.0 | 0.2 | 4.9 | 3.7 | 0.3 | 13.3 | 14.4 | 37.7 |
Max and Min stand for maximum and minimum. Rain stands for rainfall. NDC, Cum. cases and Cont. rate stand for new daily cases, cumulative cases and contamination rate, respectively.