loessreg: Analysis: loess regression (degree 0, 1 or 2)

Description

Fit a polynomial surface determined by one or more numerical predictors, using local fitting.

Usage

loessreg(
  trat,
  resp,
  degree = 2,
  sample.curve = 1000,
  ylab = "Dependent",
  xlab = "Independent",
  theme = theme_classic(),
  legend.position = "top",
  error = "SE",
  point = "all",
  width.bar = NA,
  scale = "none",
  textsize = 12,
  pointsize = 4.5,
  linesize = 0.8,
  linetype = 1,
  pointshape = 21,
  fillshape = "gray",
  colorline = "black",
  fontfamily = "sans"
)

Value

The function returns a list containing the loess regression and graph using ggplot2.

Arguments

trat: Numeric vector with dependent variable.
resp: Numeric vector with independent variable.
degree: Degree polynomial (0,1 or 2)
sample.curve: Provide the number of observations to simulate curvature (default is 1000)
ylab: Variable response name (Accepts the expression() function)
xlab: treatments name (Accepts the expression() function)
theme: ggplot2 theme (default is theme_bw())
legend.position: legend position (default is c(0.3,0.8))
error: Error bar (It can be SE - default, SD or FALSE)
point: defines whether you want to plot all points ("all") or only the mean ("mean")
width.bar: Bar width
scale: Sets x scale (default is none, can be "log")
textsize: Font size
pointsize: shape size
linesize: line size
linetype: line type
pointshape: format point (default is 21)
fillshape: Fill shape
colorline: Color lines
fontfamily: Font family

Author

Gabriel Danilo Shimizu

Leandro Simoes Azeredo Goncalves

Examples

Run this code

library(AgroReg)
data("aristolochia")
attach(aristolochia)
loessreg(trat,resp)