trend.line
Calculated specified trend line of x,y
trend.line(x, y, type = "linear", plot = TRUE, ...)
x |
Vector of x |
y |
Vector of y |
type |
Trend line types are: 'linear', 'exponential', 'logarithmic', 'polynomial' |
plot |
plot results (TRUE/FALSE) |
... |
Additional arguments passed to plot |
A list class object with the following components:
for type = 'linear' x is slope and y is intercept
for type = 'exponential', 'logarithmic', or 'polynomial' x is original x variable and y is vector of fit regression line
Jeffrey S. Evans jeffrey_evans@tnc.org
x <- 1:10
y <- jitter(x^2)
opar <- par(no.readonly=TRUE)
par(mfcol=c(2,2))
trend.line(x,y,type='linear',plot=TRUE,pch=20,main='Linear')
trend.line(x,y,type='exponential',plot=TRUE,pch=20,main='Exponential')
trend.line(x,y,type='logarithmic',plot=TRUE,pch=20,main='Logarithmic')
trend.line(x,y,type='polynomial',plot=TRUE,pch=20,main='Polynomial')
par(opar)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.