Reporting your model outputs

Feb 26, 2021 2 min read

Let’s see how to format your model outputs with parameters package in R by Lüdecke et al. (2020).

Fit a simple linear regression model

#install.packages("parameters")
library(parameters)
library(magrittr)
library(gt)
library(see)
model <- lm(Volume ~ Height + Girth, data=trees)

Reporting model parameter estimates

model %>% model_parameters()

Parameter   | Coefficient |   SE |           95% CI | t(28) |      p
--------------------------------------------------------------------
(Intercept) |      -57.99 | 8.64 | [-75.68, -40.29] | -6.71 | < .001
Height      |        0.34 | 0.13 | [  0.07,   0.61] |  2.61 | 0.014 
Girth       |        4.71 | 0.26 | [  4.17,   5.25] | 17.82 | < .001

model %>% model_parameters() %>% print_md()

Parameter	Coefficient	SE	95% CI	t(28)	p
(Intercept)	-57.99	8.64	(-75.68, -40.29)	-6.71	< .001
Height	0.34	0.13	(0.07, 0.61)	2.61	0.014
Girth	4.71	0.26	(4.17, 5.25)	17.82	< .001

model %>% model_parameters() %>% print_html()

Regression Model

Parameter	Coefficient	SE	95% CI	t(28)	p
(Intercept)	-57.99	8.64	(-75.68, -40.29)	-6.71	< .001
Height	0.34	0.13	(0.07, 0.61)	2.61	0.014
Girth	4.71	0.26	(4.17, 5.25)	17.82	< .001

Control the number of decimal places

model %>% model_parameters(digits=3) %>% print_html()

Regression Model

Parameter	Coefficient	SE	95% CI	t(28)	p
(Intercept)	-57.988	8.638	(-75.68, -40.29)	-6.713	< .001
Height	0.339	0.130	(0.07, 0.61)	2.607	0.014
Girth	4.708	0.264	(4.17, 5.25)	17.816	< .001

Visualise model parameter estimates

model %>% model_parameters(digits=3) %>% plot()

Reporting ANOVA table

model %>% aov() %>% model_parameters() %>% print_html()

Regression Model

Parameter	Sum_Squares	df	Mean_Square	F	p
Height	2901.19	1	2901.19	192.53	< .001
Girth	4782.97	1	4782.97	317.41	< .001
Residuals	421.92	28	15.07

References

Lüdecke, Daniel, Mattan S. Ben-Shachar, Indrajeet Patil, and Dominique Makowski. 2020. “Parameters: Extracting, Computing and Exploring the Parameters of Statistical Models Using R.” Journal of Open Source Software 5 (53): 2445. https://doi.org/10.21105/joss.02445.