trend.line

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trend.line

Calculated specified trend line of x,y

Usage
trend.line(x, y, type = "linear", plot = TRUE, ...)
Arguments
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

Value

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

Aliases
  • trend.line
Examples
# NOT RUN {
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)

# }
Documentation reproduced from package spatialEco, version 1.3-2, License: GPL-3

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