How do I extract cumulative use value from akde output?

[Thomas Collins FAL]

Hi folks,

firstly many many thanks for the ongoing help I have received recently! i appreciate the guidance and i am really enjoying this package!

However, and to my most recent headache!! ... I have a question that concerns a locations value of use or the cumulative probability of use (PDF / PMF / CDF). i want to use this value to indicate how close particular events are to a home range core / peripheral.  

so, if I have locations of fights, I want to know if these fight locations occur in particular parts of a UD. Say it were that fights happened most often in the centre of the UD. I want a value i can use that represents, in this case, fights occurring in high-use areas of the core (and vice versa for if it were the peripheral). The value should indicate whether events are within 50 polygon, >50 but <95 or even above the 95 % polygon. 

i can see it on the plot, but i need to extract for just one event location. i had thought it was the PDF value (or the CDF?). i had thought i could use raster::extract(). is this correct? 

Can someone please explain (preferably using code) how I might get this use value for a particular (or multiple points) point(s) of a UD (preferably from akde output or a raster of the akde)?

Very best,

Tom 

  

[Christen Fleming]

Hi Tom,

You want the cumulative distribution function (CDF). If you export it as a raster, then raster::extract() should work.

Best,

Chris

[Thomas Collins FAL]

thanks for that, Christen