/R/Linear regression r text label coefficient ggplot

Linear regression r text label coefficient ggplot

# GET EQUATION AND R-SQUARED AS STRING
# SOURCE: https://groups.google.com/forum/#!topic/ggplot2/1TgH-kG5XMA

lm_eqn <- function(df){
    m <- lm(y ~ x, df);
    eq <- substitute(italic(y) == a + b %.% italic(x)*","~~italic(r)^2~"="~r2, 
         list(a = format(unname(coef(m)[1]), digits = 2),
              b = format(unname(coef(m)[2]), digits = 2),
             r2 = format(summary(m)$r.squared, digits = 3)))
    as.character(as.expression(eq));
}

p1 <- p + geom_text(x = 25, y = 300, label = lm_eqn(df), parse = TRUE)

Source: stackoverflow.com

Linear regression r text label coefficient ggplot

lm_eqn = function(m) {

  l <- list(a = format(coef(m)[1], digits = 2),
      b = format(abs(coef(m)[2]), digits = 2),
      r2 = format(summary(m)$r.squared, digits = 3));

  if (coef(m)[2] >= 0)  {
    eq <- substitute(italic(y) == a + b %.% italic(x)*","~~italic(r)^2~"="~r2,l)
  } else {
    eq <- substitute(italic(y) == a - b %.% italic(x)*","~~italic(r)^2~"="~r2,l)    
  }

  as.character(as.expression(eq));                 
}

Source: stackoverflow.com

Similar codes

0 vote148 views1 answer
Histogram r add line
R
0 vote154 views1 answer
Moving average in r
R
0 vote112 views1 answer
How to loop in r using a character in a string
R
0 vote159 views1 answer
Kable thousand mark
R
0 vote212 views2 answers
Connect excel to r
R
0 vote102 views1 answer
Split strings by space in r
R
2 votes174 views1 answer
R count number of na
R
0 vote169 views1 answer
R seq
R
0 vote202 views3 answers
Read xlsx in r
R
0 vote176 views1 answer
Reduce ggtitle size
R