Multiple regression models in a markdown table with memisc and pander

memisc_and_pander.R

m1 <- lm(mpg ~ hp, data = mtcars)
m2 <- lm(mpg ~ hp + drat, data = mtcars)
m3 <- lm(mpg ~ hp + drat + factor(gear), data = mtcars)

library(pander); library(memisc)
panderOptions('table.alignment.rownames', 'left')
pander(relabel(
    mtable(m1, m2, m3,
           summary.stats=c('N', 'R-squared', 'F')),
    '(Intercept)'       = 'Constant',
    'hp'                = 'Gross horsepower',
    'factor(gear): 4/3' = 'Four forward gears',
    'factor(gear): 5/3' = 'Five forward gears',
    'N'                 = 'Observations'))

output.txt

------------------------------------------------------------------
                         m1            m2            m3      
------------------------ ------------- ------------- -------------
**Constant**              30.099***\     10.790*\      16.306*\   
                            (1.634)       (5.078)       (6.429)   

**Gross horsepower**      -0.068***\    -0.052***\    -0.064***\  
                            (0.010)       (0.009)       (0.011)   

**drat**                       \        4.698***\       3.510\    
                                          (1.192)       (1.851)   

**Four forward gears**         \             \         -0.276\    
                                                        (2.135)   

**Five forward gears**         \             \          3.761\    
                                                        (2.161)   

**Observations**              32            32            32      

**R-squared**                 0.6           0.7           0.8     

**F**                        45.5          41.5          24.2     
------------------------------------------------------------------

any idea what the error means?

"the most recent version of the pander package dropped support for mtable but there are plans to re-integrate it at Rapporter/pander#304"

https://stackoverflow.com/questions/24342162/regression-tables-in-markdown-format-for-flexible-use-in-r-markdown-v2