Anyone could write a function named prob.def1, and it is not part of base R so 
it is off-topic here and there is no way for people on this list to 
definitively know the answer. As far as Google can tell me it is not from CRAN 
either. OP should go talk to whoever wrote this code.

On November 26, 2021 10:28:02 AM PST, Bert Gunter <bgunter.4...@gmail.com> 
wrote:
>Bert Gunter
>
>"The trouble with having an open mind is that people keep coming along
>and sticking things into it."
>-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>
>---------- Forwarded message ---------
>From: Bert Gunter <bgunter.4...@gmail.com>
>Date: Fri, Nov 26, 2021 at 10:27 AM
>Subject: Re: [R] Package is not available for this version of R.
>To: Amanze Ozioma <amanzeoziom...@gmail.com>
>
>
>You got messages telling you that some of the package's dependencies
>could not be installed. So the package cannot possibly work. Try
>uninstalling and reinstalling. After that, I have no idea. I have
>cc'ed this to the list so that others may help, which you should
>always do unless there is some specific reason not to.
>
>Bert Gunter
>
>"The trouble with having an open mind is that people keep coming along
>and sticking things into it."
>-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>On Fri, Nov 26, 2021 at 10:13 AM Amanze Ozioma <amanzeoziom...@gmail.com> 
>wrote:
>>
>> Yes, I installed and made it available. It still did not work. See it below.
>>
>>
>>
>>
>>
>> Sent from Mail for Windows
>>
>>
>>
>> From: Bert Gunter
>> Sent: Friday, November 26, 2021 6:29 PM
>> To: Amanze Ozioma
>> Subject: Re: [R] Package is not available for this version of R.
>>
>>
>>
>> Did you make the package(prob) available via ?library before trying to
>>
>> use the function?
>>
>>
>>
>> Bert Gunter
>>
>>
>>
>> "The trouble with having an open mind is that people keep coming along
>>
>> and sticking things into it."
>>
>> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>>
>>
>>
>> On Fri, Nov 26, 2021 at 9:23 AM Amanze Ozioma <amanzeoziom...@gmail.com> 
>> wrote:
>>
>> >
>>
>> > Good day. Thank you for the reply. I have previously installed 'prob'. 
>> > After installing, when I try to use the prob.def1 function, it says, 
>> > 'could not find function 'prob.def1'.
>>
>> >  Thinking I made a mistake with the package name, I tried installing 
>> > 'probability' package instead of 'prob'. Error message is 'this package 
>> > does not exist for this version of R'.
>>
>> >  Please, may I know what particular package 'prob.def1' falls under? This 
>> > is an example of what I am trying to carry out.
>>
>> > r0=log(0.7)
>>
>> > E0=Eventnum(r=r0, alpha=0.05, beta=0.2)
>>
>> > set.seed(123)
>>
>> > AP1 <- prob.def1(r0=r0, s=3, E0=E0, u=c(1,1,1), f=c(1/3,1/3,1/3),
>>
>> > pai=1/3, n=1000, lamda=1, lamda_cen=1, L=2)
>>
>> >
>>
>> > On Fri, Nov 26, 2021, 6:16 PM Bert Gunter <bgunter.4...@gmail.com> wrote:
>>
>> >>
>>
>> >> You seem to be confused. The package appears to be "prob" containing a
>>
>> >> function prob.def1(). If I am correct about this, you need to review
>>
>> >> these materials in your course to proceed.
>>
>> >>
>>
>> >>
>>
>> >> Bert Gunter
>>
>> >>
>>
>> >> "The trouble with having an open mind is that people keep coming along
>>
>> >> and sticking things into it."
>>
>> >> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>>
>> >>
>>
>> >>
>>
>> >> On Fri, Nov 26, 2021 at 9:02 AM Amanze Ozioma <amanzeoziom...@gmail.com> 
>> >> wrote:
>>
>> >> >
>>
>> >> > Hi, Good afternoon.
>>
>> >> >  Please I am trying to do my project from school. I keep getting the 
>> >> > error
>>
>> >> > message that the package is not available. Please advise. below is the
>>
>> >> > error message. May I know what package the 'prob.def1' is under?
>>
>> >> > ______________________________________________
>>
>> >> > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>
>> >> > https://stat.ethz.ch/mailman/listinfo/r-help
>>
>> >> > PLEASE do read the posting guide 
>> >> > http://www.R-project.org/posting-guide.html
>>
>> >> > and provide commented, minimal, self-contained, reproducible code.
>>
>>
>
>______________________________________________
>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.

-- 
Sent from my phone. Please excuse my brevity.

______________________________________________
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