mrds multiplier option

[Anukul Nath]

Dear all,

I am unable to find the multiplier function in mrds package. I need to incorporate the pellet decay rate along with standard error. 

I am using the following codes

nb <- dht(model=model1, region.table=region,

          sample.table=samples, obs.table=obs, options=list(convert.units=.1)) 

I have the following multipliers value --

mult <- list(creation = data.frame(rate=9, SE=0),

             decay    = data.frame(rate=136, SE=9))

regards

Anukul

-----------------------------------------------------

Anukul Nath, M.Sc, PhD
Assistant Technical Officer

UNESCO C2C - Asia and Pacific Region

Wildlife Institute of India

Dehradun, India

[Len Thomas]

Hi Anukul,

I think you're looking for the dht2 function in the Distance package.
It has an argument multipliers, which takes as input a list of the type
you have there. Try something like

library(Distance)
nb <- dht2(ddf = model1, observations = obs, transect = samples,
geo_strat = region, convert_units = 0.1,
multipliers = mult)

I may have this a bit wrong (for example with your stratification) as
I'm guessing about your code -- but hopefully the examples in the help
for dht2 and on our examples web site (especially the dung survey one

https://examples.distancesampling.org/Distance-mult/multipliers-distill.html

) will help.

Cheers, Len

On 11/10/2022 17:54, Anukul Nath wrote:
> Dear all,
> I am unable to find the multiplier function in mrds package. I need to
> incorporate the pellet decay rate along with standard error.
> I am using the following codes
> nb <- dht(model=model1, region.table=region,
>           sample.table=samples, obs.table=obs,
> options=list(convert.units=.1))
>
> I have the following multipliers value --
> mult <- list(creation = data.frame(rate=9, SE=0),
>              decay    = data.frame(rate=136, SE=9))
>
> regards
> Anukul
>
>

> /
> /
> /-----------------------------------------------------/
> /Anukul Nath, M.Sc, PhD
> Assistant Technical Officer/
> /UNESCO C2C - Asia and Pacific Region/
> /Wildlife Institute of India/
> /Dehradun, India/
>
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--
Len Thomas (he/him) len.t...@st-andrews.ac.uk lenthomas.org @len_thom
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