stargazer output：如何省略 as.factor(variable) 的一个值？

Question

I have a model like this

model <-lm(outcome ~ var0 + var1 + as.factor(var2))

with var2 taking the values A , B , and C . I create the output with stargazer . I would like to omit var0 and as.factor(var2)A from the output. I couldn't achieve this; I tried:

stargazer(model, type = "html", out = "./output.html",
    omit = c("var0", "var2")) # omits ALL var2 entries

stargazer(model, type = "html", out = "./output.html",
    omit = c("var0", "as.factor(var2)B")) # omits no var2 entry in addition to the base category (A)

Can someone point me to the solution? ( NB : this is not what this question asks, which wants to omit ALL entries of the variables.)

The second example results in output. But I would like the entry marked in yellow to be omitted.

Answer 1

This has something to do how stargazer treats the omit argument. The documentation says that it expects a vector of regular expressions. In a regular expression, . , ( and ) are a special characters, so you have to escape them, in R this is done with a double backslash \\ . So your argument becomes omit = c("var0", "as\\.factor\\(var2\\)B") .

stargazer(model, type = "html", out = "./output.html",
    omit = c("var0", "as\\.factor\\(var2\\)B"))