View source: R/grantham_distance.R
grantham_distance_exact | R Documentation |
This function calculates the Grantham's distance for pairs of amino acids. It uses the values for the amino acid properties as published in Table 1 of Science (1974). 185(4154): 862–4 by R. Grantham.
grantham_distance_exact(
x,
y,
alpha = 1.833,
beta = 0.1018,
gamma = 0.000399,
rho = 50.723
)
x |
A character vector of amino acid three-letter codes, e.g. |
y |
A character vector of amino acid three-letter codes. |
alpha |
The constant |
beta |
The constant |
gamma |
The constant |
rho |
Grantham's distances reported in Table 2, Science (1974).
185(4154): 862–4 by R. Grantham, are scaled by a factor (here named
|
Contrary to Grantham's distances presented in Table 2 of Grantham's paper, the distances returned by this function are calculated anew starting from the amino acid properties (composition, polarity and molecular volume). No rounding to nearest integer is performed.
A tibble of Grantham's distances for each amino acid pair.
.
grantham_equation()
grantham_distance_exact(c("Ser", "Ser"), c("Pro", "Trp"))
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