[R] Trendline for a subset of data

[Mark Difford]

Hi Steve,

>> However, I am finding that ... the trendline ... continues to run beyond
>> this data segment 
>> and continues until it intersects the vertical axes at each side of the
>> plot.

Your "best" option is probably Prof. Fox's reg.line function in package car.

##
library(car)
?reg.line
reg.line

Regards, Mark.


smurray444 wrote:
> 
> 
> Dear all,
> 
> I am using abline(lm ...) to insert a linear trendline through a portion
> of my data (e.g. dataset[,36:45]). However, I am finding that whilst the
> trendline is correctly displayed and representative of the data portion
> I've chosen, the line continues to run beyond this data segment and
> continues until it intersects the vertical axes at each side of the plot.
> 
> How do I display the line so that it only runs between point 36 and 45 (as
> shown in the example above) as doesn't continue to display a line
> throughout the rest of the plot space?
> 
> Many thanks,
> 
> Steve
>  		 	   		  
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