distMode | R Documentation |
Function to calculate the mode of a unimodal distribution which is specified by the root of the density function name and the corresponding parameters.
distMode(densFn, param = NULL, ...)
densFn |
Character. The name of the density function for which the mode is required. |
param |
Numeric. A vector giving the parameter values for the
distribution specified by |
... |
Passes arguments to |
The name of the unimodal density function must be supplied as the
characters of the root for that density (e.g. norm
,
ghyp
). The particular unimodal distribution being considered is
specified by the value of the argument param
, or for base R
distributions by specification in the ... arguments.
The mode is found by a numerical optimization using
optimize
.
David Scott d.scott@auckland.ac.nz, Joyce Li xli053@aucklanduni.ac.nz
distStepSize
, qDist
.
normRange <- distCalcRange("norm", tol = 10^(-7), mean = 4, sd = 1)
curve(dnorm(x, mean = 4, sd = 1), normRange[1], normRange[2])
abline(v = distMode("norm", mean = 4, sd = 1), col = "blue")
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