geomean, harmmean | R Documentation |
Geometric and harmonic mean along a dimension of a vector, matrix, or
array.
trimmean
is almost the same as mean
in R.
geomean(x, dim = 1)
harmmean(x, dim = 1)
trimmean(x, percent = 0)
x |
numeric vector, matrix, or array. |
dim |
dimension along which to take the mean; |
percent |
percentage, between 0 and 100, of trimmed values. |
trimmean
does not call mean
with the trim
option, but
rather calculates k<-round(n*percent/100/2)
and leaves out k
values at the beginning and end of the sorted x
vector (or row or
column of a matrix).
Returns a scalar or vector (or array) of geometric or harmonic means:
For dim=1
the mean of columns, dim=2
the mean of rows, etc.
To have an exact analogue of mean(x)
in Matlab,
apply trimmean(x)
.
mean
A <- matrix(1:12, 3, 4)
geomean(A, dim = 1)
## [1] 1.817121 4.932424 7.958114 10.969613
harmmean(A, dim = 2)
## [1] 2.679426 4.367246 5.760000
x <- c(-0.98, -0.90, -0.68, -0.61, -0.61, -0.38, -0.37, -0.32, -0.20, -0.16,
0.00, 0.05, 0.12, 0.30, 0.44, 0.77, 1.37, 1.64, 1.72, 2.80)
trimmean(x); trimmean(x, 20) # 0.2 0.085
mean(x); mean(x, 0.10) # 0.2 0.085
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