As stated earlier in the thread, this is where you would need to use get(paste0("bop", im)) [the analogue of assign]. This unwieldiness is the exact reason that several posters are encouraging you to change your approach and store these objects in a list ...

On 2024-06-24 8:16 a.m., Steven Yen wrote:
Great, thanks. Eric's suggestion is the most simple. Here's a resulting
problem. In the call to ame.bopa in a loop, I like inputs in the call to
ame.bopa to be bop1, bop2, bop3,... Thanks.

for (im in 1:m) {
ame<-ame.bopa(bop,y1.level=y1value,y2.level=y2value,jindex=jindex1,vb.method="invH",joint12=TRUE,
                  printing=FALSE,testing=TRUE)
}

On 6/24/2024 7:57 PM, Eric Berger wrote:
assign(paste0("bop",im),boprobit(eqs,mydata,wt=weight,method="BHHH",tol=0,reltol=0,gradtol=1e-5,Fisher=TRUE))


On Mon, Jun 24, 2024 at 2:56 PM Steven Yen <st...@ntu.edu.tw> wrote:

     Thanks Eric. I am not following your suggested line. Would you
     just edit my line 4? Thanks.

     On 6/24/2024 7:51 PM, Eric Berger wrote:
     How about

     assign(paste0("bop",im), boprobit( etc ))



     On Mon, Jun 24, 2024 at 2:41 PM Steven Yen <st...@ntu.edu.tw> wrote:

         I would like a loop to

         (1) read data files 2010midata1,2010midata2,2010midata3; and

         (2)  name OUTPUT bop1,bop2,bop3.

         I succeeded in line 3 of the code below,

         BUT not line 4. The error message says:

         Error in paste0("bop", im) <- boprobit(eqs, mydata, wt =
         weight, method
         = "NR", : target of assignment expands to non-language object
         Please
         help. Thanks.

         m<-3
         for (im in 1:m) {
         mydata<-read.csv(paste0("2010midata",im,".csv"))
         
paste0("bop",im)<-boprobit(eqs,mydata,wt=weight,method="BHHH",tol=0,reltol=0,gradtol=1e-5,Fisher=TRUE)
         }



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