用ggpmisc显示nls模型的方程 [英] Showing equation of nls model with ggpmisc
本文介绍了用ggpmisc显示nls模型的方程的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
R
程序包 ggpmisc
可用于显示 lm
模型和 poly 模型放在 ggplot2
(请参阅此处以供参考)。不知道如何使用 ggmisc
在 ggplot2
上显示 nls
>。
library(ggpmisc)
args< - list(formula = y〜k * e) ^ $
start = list(k = 1,e = 2))
ggplot(mtcars,aes(wt,mpg))+
geom_point()+
stat_fit_augment( method =nls,
method.args = args)
解决方案灵感来自你链接的帖子。使用 geom_text
在提取参数后添加标签。
nlsFit< -
nls(公式= mpg〜k * e ^ wt,
start = list(k = 1,e = 2),
data = mtcars)
nlsParams < -
nlsFit $ m $ getAllPars()
nlsEqn < -
替换(italic(y)== k%。%e ^ italic(x),
list(k =格式(nlsParams ['k'],digits = 4),
e =格式(nlsParams ['e'],digits = 2)))
nlsTxt < -
as.character(as.expression(nlsEqn))
ggplot(mtcars,aes(wt,mpg))+
geom_point()+
stat_fit_augment(method =nls,
method.args = args)+
geom_text(x = 5,y = 30,label = nlsTxt,parse = TRUE)
R
package ggpmisc
can be used to show equation of lm
model and poly
model on ggplot2
(See here for reference). Wonder how to show nls
model equation results on ggplot2
using ggmisc
. Below is my MWE.
library(ggpmisc)
args <- list(formula = y ~ k * e ^ x,
start = list(k = 1, e = 2))
ggplot(mtcars, aes(wt, mpg)) +
geom_point() +
stat_fit_augment(method = "nls",
method.args = args)
解决方案 Inspired by the post you linked. Use geom_text
to add the label after extracting parameters.
nlsFit <-
nls(formula = mpg ~ k * e ^ wt,
start = list(k = 1, e = 2),
data = mtcars)
nlsParams <-
nlsFit$m$getAllPars()
nlsEqn <-
substitute(italic(y) == k %.% e ^ italic(x),
list(k = format(nlsParams['k'], digits = 4),
e = format(nlsParams['e'], digits = 2)))
nlsTxt <-
as.character(as.expression(nlsEqn))
ggplot(mtcars, aes(wt, mpg)) +
geom_point() +
stat_fit_augment(method = "nls",
method.args = args) +
geom_text(x = 5, y = 30, label = nlsTxt, parse = TRUE)
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