小编Jam*_*mes的帖子

我无法在皮尔逊相关图中为化学名称添加下标。如果有人可以提供帮助，那就太棒了：

colnames(JO_Data) = c("CO2","Cumulative CO2", "N2O", "Cumulative N2O", "pH", "pH (CaCl2)", "EC", "MBC", "NH4", "NO3")

library(metan)

corrl <- corr_coef(JO_Data)

plot(corrl)

> str(JO_Data)
'data.frame':   288 obs. of  10 variables:
 $ CO2           : num  0.517 0.448 0.593 0.627 1.211 ...
 $ Cumulative CO2: num  0.517 0.448 0.593 0.627 1.211 ...
 $ N2O           : num  0.0264 0.0241 0.0298 0.0338 0.0644 ...
 $ Cumulative N2O: num  0.0264 0.0241 0.0298 0.0338 0.0644 ...
 $ pH            : num  5.9 5.94 5.98 5.95 6.1 6.09 6.12 6.11 …