a2c | R Documentation |
Compute the 'c' G-spline coefficients from 'a' G-spline coefficients.
a2c(acoef)
acoef |
A vector of 'a' G-spline coefficients. |
'c' and 'a' G-spline coefficients are related by the expression
c_j = \frac{\exp(a_j)}{\sum_{l=1}^{g}\exp(a_l)}, j = 1,\dots, g,
where a_k = 0,
k = which.zero
.
This function transforms the 'c' coefficients into their 'a' counterparts.
A vector of same length as acoef
with 'c' G-spline coefficients.
Arnošt Komárek arnost.komarek@mff.cuni.cz
c2a
ccoef <- c(0.1, 0.2, 0.15, 0.3, 0.25)
### Compute 'a' counterparts
acoef <- c2a(ccoef, 1)
print(acoef)
### And back 'c', ccoef2 should be same as ccoef
ccoef2 <- a2c(acoef)
print(ccoef2)
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