CODEWITHSUNDEEP
rr-markdown
adatum
adatum

Reputation: 705

RMarkdown: how to print formula inline

Given a linear model:

fit <- lm(mpg~., mtcars)

I tried `r formula(fit)` to print the model/formula inline, but trying to knit the RMarkdown file to PDF or HTML gives errors (error in vapply...)

If it do the same thing inside a triple quoted code chunk, it works fine:

```{r}
formula(fit)
```

formula(fit) prints the formula on the R interpreter as I would like.

Is there a limitation to what can be done in an inline code chunk, or am I missing something?

Upvotes: 3

Views: 2131

Answers (1)

Heroka
Heroka

Reputation: 13169

I don't know why exactly, but I think the issue lies in the structure and formatting of a formula-object. I'm guessing that the objects get converted to character in order to be printed. This is why it works (albeit in a weird sequence) for one independent variable, but doesn't work for multiple independent variables.

A workaround is to use 

`r format(formula(fit))`

As inline code, it gave me the desired result.

Upvotes: 5

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