peaks {splus2R} | R Documentation |
Finds the local maxima in a vector, or time series, or in each column of a matrix.
peaks(x, span=3, strict=TRUE)
x |
vector or matrix. |
span |
a peak is defined as an element in a sequence which is greater than all other elements within a window of width span centered at that element. The default value is 3, meaning that a peak is bigger than both of its neighbors. Default: 3. |
strict |
logical flag: if TRUE, an element must be strictly greater than all other values in its window to be considered a peak. Default: TRUE. |
an object like x of logical values. Values that are TRUE correspond to local peaks in the data.
anyMissing
, as.rectangular
, colIds
, colMaxs
, colMedians
, colMins
, colRanges
, colStdevs
, colVars
, deparseText
, ifelse1
, is.numeric.atomic.vector
, is.rectangular
, is.missing
, is.zero
, lowerCase
, oldUnclass
, numCols
, numRows
, positions
, rowIds
, rowMaxs
, rmvnorm
, stdev
, subscript2d
, upperCase
, vecnorm
, which.na
.
x <- as.vector(sunspots) z <- peaks(x, span=51) plot(x, type="l") abline(v=which(z), col="red", lty="dashed")