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failmonspline
2010 Feb 15
1
Non-monotonic spline using splinefun(method = "monoH.FC")
...example created to demonstrate this,
###############################################
# Create the following data
# This is created so that their are two adjoining sections which have to
be adjusted
x <- 1:8
y <- c(-12, -10, 3.5, 4.45, 4.5, 140, 142, 142)
# Now run the splinefun() function
FailMonSpline <- splinefun(x, y, method = "mono")
# In theory this should be monotonic increasing but the required
conditions are not satisfied
# Check values of alpha and beta for this curve
m <- FailMonSpline(x, deriv = 1)
nx <- length(x)
n1 <- nx - 1L
dy <- y[-1] - y[-nx]
dx <-...
2010 Feb 18
0
Error in coding for splinefun(method = "monoH.FC") (PR#14215)
...example created to demonstrate this,
###############################################
# Create the following data
# This is created so that their are two adjoining sections which have to
be adjusted
x <- 1:8
y <- c(-12, -10, 3.5, 4.45, 4.5, 140, 142, 142)
# Now run the splinefun() function
FailMonSpline <- splinefun(x, y, method = "mono")
# In theory this should be monotonic increasing but the required
conditions are not satisfied
# Check values of alpha and beta for this curve
m <- FailMonSpline(x, deriv = 1)
nx <- length(x)
n1 <- nx - 1L
dy <- y[-1] - y[-nx]
dx <-...