Question

I am using the dprint package with knitr , mainly so that I can highlight rows from a table, which I have got working, but the output image leaves a fairly large space for a footnote, and it is taking up unnecessary space.

Is there away to get rid of it?

Also since I am fairly new to dprint, if anybody has better ideas/suggestions as to how to highlight tables and make them look pretty without any footnotes… or ways to tidy up my code that would be great!

An example of the Rmd file code is below…

```{r fig.height=10, fig.width=10, dev='jpeg'}
library("dprint")
k <- data.frame(matrix(1:100, 10,10))
CBs <- style(frmt.bdy=frmt(fontfamily="HersheySans"), frmt.tbl=frmt(bty="o", lwd=1),
        frmt.col=frmt(fontfamily="HersheySans", bg="khaki", fontface="bold", lwd=2, bty="_"),
        frmt.grp=frmt(fontfamily="HersheySans",bg="khaki", fontface="bold"),
        frmt.main=frmt(fontfamily="HersheySans", fontface="bold", fontsize=12),
        frmt.ftn=frmt(fontfamily="HersheySans"),
        justify="right", tbl.buf=0)

x <- dprint(~., data=k,footnote=NA, pg.dim=c(10,10), margins=c(0.2,0.2,0.2,0.2), 
              style=CBs, row.hl=row.hl(which(k[,1]==5), col='red'), 
               fit.width=TRUE, fit.height=TRUE,  
                showmargins=TRUE, newpage=TRUE, main="TABLE TITLE")

```

Thanks in advance!

Answer 1

So here’s my solution…with some examples…

I’ve just copied and pasted my Rmd file to demonstrate how to use it.

you should be able to just copy and paste it into a blank Rmd file and then knit to HTML to see the results…

Ideally what I would have liked would have been to make it all one nice neat function rather than splitting it up into two (i.e. setup.table & print.table) but since chunk options can’t be changed mid chunk as suggested by Yihui, it had to be split up into two functions…

`dprint` +  `knitr` Examples to create table images
===========

```{r}
library(dprint)
# creating the sytle object to be used
CBs <- style(frmt.bdy=frmt(fontfamily="HersheySans"), 
             frmt.tbl=frmt(bty="o", lwd=1),
        frmt.col=frmt(fontfamily="HersheySans", bg="khaki", 
                      fontface="bold", lwd=2, bty="_"),
        frmt.grp=frmt(fontfamily="HersheySans",bg="khaki", 
                      fontface="bold"),
        frmt.main=frmt(fontfamily="HersheySans", fontface="bold", 
                       fontsize=12),
        frmt.ftn=frmt(fontfamily="HersheySans"),
        justify="right", tbl.buf=0)

# creating a setup function to setup printing a table (will probably put this function into my .Rprofile file)
setup.table <- function(df,width=10, style.obj='CBs'){
  require(dprint)
  table.style <- get(style.obj)
  a <- tbl.struct(~., df)
  b <- char.dim(a, style=table.style)
  p <- pagelayout(dtype = "rgraphics", pg.dim = NULL, margins = NULL)
  f <- size.simp(a[[1]], char.dim.obj=b, loc.y=0, pagelayout=p)
  # now to work out the natural table width to height ratio (w.2.h.r) GIVEN the style
  w.2.h.r <- as.numeric(f$tbl.width/(f$tbl.height +b$linespace.col+ b$linespace.main))
  height <- width/w.2.h.r

  table.width <- width
  table.height <- height

  # Setting chunk options to have right fig dimensions for the next chunk
  opts_chunk$set('fig.width'=as.numeric(width+0.1))
  opts_chunk$set('fig.height'=as.numeric(height+0.1))

  # assigning relevant variables to be used when printing
  assign("table.width",table.width, envir=.GlobalEnv)
  assign("table.height",table.height, envir=.GlobalEnv)
  assign("table.style", table.style, envir=.GlobalEnv)
}

# function to print the table (will probably put this function into my .Rprofile file as well)
print.table <- function(df, row.2.hl='2012-04-30', colour='lightblue',...) {
  x <-dprint(~., data=df, style=table.style, pg.dim=c(table.width,table.height), ..., newpage=TRUE,fit.width=TRUE, row.hl=row.hl(which(df[,1]==row.2.hl), col=colour))
}
```

```{r}
# Giving it a go!
# Setting up two differnt size tables
small.df <- data.frame(matrix(1:100, 10,10))
big.df <- data.frame(matrix(1:800,40,20))
```


```{r}
# Using the created setup.table function
setup.table(df=small.df, width=10, style.obj='CBs')
```

```{r}
# Using the print.table function
print.table(small.df,4,'lightblue',main='table title string') # highlighting row 4
```

```{r}
setup.table(big.df,13,'CBs') # now setting up a large table
```

```{r}
print.table(big.df,38,'orange', main='the big table!') # highlighting row 38 in orange
```

```{r}
d <- style() # the default style this time will be used
setup.table(big.df,15,'d')
```

```{r}
print.table(big.df, 23, 'indianred1') # this time higlihting row 23
```