R help - Nov 2024 - Remove all box around a plot except bottom line (base graphics)

On 2024-11-28 8:36 a.m., Michael Dewey wrote:
> To make the plot clearer I have removed the axes but I wish to remove
> all the boz except the bottom horizontal line. Using the bty parameter
> does not seem to enable me to just leave the horizontal line at the
> foot. I can get the "l" version to remove everything except the
left
> hand side and the base. I could also remove the entire box but that
> looks odd. Am I reading the documentation incorrectly or is it really
> impossible?
> 
It's not something that `bty` can specify or `box()` can do, but you can 
draw a line using lines() or segments().  For example:

  plot(rnorm(100), yaxt="n", bty="n")
  usr <- par("usr")
  lines(usr[c(1,2)], usr[c(3,3)], xpd = TRUE)

You might not even need the lines() call if you don't care how far the 
axis extends.

Duncan Murdoch

Thank you Duncan, I will try that next.

Michael

On 28/11/2024 13:52, Duncan Murdoch wrote:
> On 2024-11-28 8:36 a.m., Michael Dewey wrote:
>> To make the plot clearer I have removed the axes but I wish to remove
>> all the boz except the bottom horizontal line. Using the bty parameter
>> does not seem to enable me to just leave the horizontal line at the
>> foot. I can get the "l" version to remove everything except
the left
>> hand side and the base. I could also remove the entire box but that
>> looks odd. Am I reading the documentation incorrectly or is it really
>> impossible?
>>
> 
> It's not something that `bty` can specify or `box()` can do, but you
can
> draw a line using lines() or segments().? For example:
> 
>  ?plot(rnorm(100), yaxt="n", bty="n")
>  ?usr <- par("usr")
>  ?lines(usr[c(1,2)], usr[c(3,3)], xpd = TRUE)
> 
> You might not even need the lines() call if you don't care how far the 
> axis extends.
> 
> Duncan Murdoch
> 
-- 
Michael

That's pretty similar to call axis function, i.e.


 ?plot(rnorm(100), yaxt="n", bty="n")
 ?usr <- par("usr")
 ?## lines(usr[c(1,2)], usr[c(3,3)], xpd = TRUE)

 ?axis(1, ...) # where 1 is bottom, 2 left, 3 top, and 4 right sides of 
the plot box)

Best

Fer

On 11/28/24 14:52, Duncan Murdoch wrote:
> On 2024-11-28 8:36 a.m., Michael Dewey wrote:
>> To make the plot clearer I have removed the axes but I wish to remove
>> all the boz except the bottom horizontal line. Using the bty parameter
>> does not seem to enable me to just leave the horizontal line at the
>> foot. I can get the "l" version to remove everything except
the left
>> hand side and the base. I could also remove the entire box but that
>> looks odd. Am I reading the documentation incorrectly or is it really
>> impossible?
>>
>
> It's not something that `bty` can specify or `box()` can do, but you 
> can draw a line using lines() or segments().? For example:
>
> ?plot(rnorm(100), yaxt="n", bty="n")
> ?usr <- par("usr")
> ?lines(usr[c(1,2)], usr[c(3,3)], xpd = TRUE)
>
> You might not even need the lines() call if you don't care how far the 
> axis extends.
>
> Duncan Murdoch
>
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