Hiding NA's when printing a dataframe in knitr

Question

I'm trying to print a table in knitr from a data frame using xtable . The table in the example below has the dimensions 3x7 but the third row only has one value, in the second column. The rest of the cells in the third row are 'NA'.

When I compile the document, is there a way to prevent knitr from printing the NA's in the third row, so instead of NA I just have blank space?

It feels like this should be a simple solution but I can't work out where/how to hide the NA's. Is it a change I need to make to the data frame or is it an xtable or knitr option I need to change?

Sample knitr code:

\documentclass{article}

<< data1, echo=FALSE,  warning=FALSE, message=FALSE >>=

require(xtable)

  FY.2014 <- 0.019
  FY.2015 <- ((7000)  - (6925.9)) / (6925.9)
  FY.2016 <- ((8000)  - (7000))   / (7000)
  FY.2017 <- ((9000)  - (8000))   / (8000)
  FY.2018 <- ((10000) - (9000))   / (9000)
  FY.2019 <- ((11000) - (10000))  / (10000)

  PC      <- data.frame(FY.2014, FY.2015, FY.2016, FY.2017, FY.2018, FY.2019)
  PC.1    <- paste(round(PC*100, digits=1), "%", sep="")


 FY.2014 <- 130.1
 FY.2015 <- 7000  - 6925.9
 FY.2016 <- 8000  - 7000
 FY.2017 <- 9000  - 8000
 FY.2018 <- 10000 - 9000
 FY.2019 <- 11000 - 10000

 AB      <- data.frame(FY.2014, FY.2015, FY.2016, FY.2017, FY.2018, FY.2019)
 AB.1    <- paste(round(AB , digits = 2))


    FY.2014 <- as.numeric(c(""))
    FY.2015 <- 7242.9
    FY.2016 <- as.numeric(c(""))
    FY.2017 <- as.numeric(c(""))
    FY.2018 <- as.numeric(c(""))
    FY.2019 <- as.numeric(c(""))

    PF      <- data.frame(FY.2014, FY.2015, FY.2016, FY.2017, FY.2018, FY.2019)
    PF.1    <- paste(round(PF , digits = 2))

     FTable  <- rbind( PC.1, AB.1, PF.1)

      rownames(FTable) <- c( 'Percent Change from the Previous Year', 
                             'Absolute Change from Previous Year', 
                             'December CY13 Forecast')
      colnames(FTable) <- c( 'FY 2014', 'FY 2015', 'FY 2016', 'FY 2017', 'FY 2018',    'FY 2019')

@ 

\begin{document}
<<Table 1 , echo=FALSE, eval=TRUE, results='asis', fig.width = 5, fig.height = 2,     message=FALSE, fig.align='center', warning=FALSE>>=

          xFTable  <- xtable(FTable, big.mark=",")

          print(xFTable) 
@
\end{document}

You could try print(xFTable, na.print = "") You may have to use print.default or a different print method to print the doc. But na.print appears in quite a few print methods — Rich Scriven
Or if you are happy with markdown tables instead of LaTeX, then you could use pander where you can specify how to print NAs with the missing argument or global option. — daroczig
Thanks for the suggestion but I tried print(xFTable, na.print="") without any success. I didn't find na.print in the xtable documentation. — Matt

svannoy svannoy · Accepted Answer · 2016-11-24T23:04:17

You can set the knitr option knitr.kable.na = '' '' for blanks, or whatever character you want.

```{r echo=FALSE, results='asis'}
    options(knitr.kable.NA = '')
    knitr::kable(lowerTri, digits=2)
```

Hiding NA's when printing a dataframe in knitr

2 Answers