[R] additional graphical parameters in contour function

[Uwe Ligges]

Abdou ALI wrote:

> 
>>> Do you know why additional graphical parameters (like "type","pch", 
>>> ...) do not work in the R contour fonction. For example the command 
>>> 'contour(..., type="o",pch=16)' gives nothing, just simple contour 
>>> lines.
>>
>>
>> Please, can you explain why you think it does make sense here?
>>
> The reason is that I want to add on a same graphic several contour plot, 
> and I want to give different line types for each contour. I thus thought 
> that these options of the contour function made it possible to do it.

But these arguments do not refer to line types at all!

Use "lty" instead as in:

  x <- -6:16
  op <- par(mfrow = c(2, 1))
  contour(outer(x, x), method = "edge", lty=1)
  contour(outer(x, x), method = "edge", lty=2)

Uwe Ligges




> Thank.
> 
> 
>>
>> Uwe Ligges
>>
>>
>>> Thank you for your response.
>>>
>>> Abdou. [[alternative HTML version deleted]]
>>>
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>>
>>