Log transformations
log_trans(): log(x)
log1p(): log(x + 1)
pseudo_log_trans(): smoothly transition to linear scale around 0.
log_trans(base = exp(1)) log10_trans() log2_trans() log1p_trans() pseudo_log_trans(sigma = 1, base = exp(1))
base |
base of logarithm |
sigma |
Scaling factor for the linear part of pseudo-log transformation. |
plot(log2_trans(), xlim = c(0, 5)) plot(log_trans(), xlim = c(0, 5)) plot(log10_trans(), xlim = c(0, 5)) plot(log_trans(), xlim = c(0, 2)) plot(log1p_trans(), xlim = c(-1, 1)) # The pseudo-log is defined for all real numbers plot(pseudo_log_trans(), xlim = c(-5, 5)) lines(log_trans(), xlim = c(0, 5), col = "red") # For large positives nubmers it's very close to log plot(pseudo_log_trans(), xlim = c(1, 20)) lines(log_trans(), xlim = c(1, 20), col = "red")
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.