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bugs and misfeatures in polr(MASS).... fixed!

4 messages · ahs, tjb

ahs
# 
Hello,
I am trying to use this fix for the convergence problem in polr, but I don't
seem to get the change of code right. I redefine the function polr by the
lines


tjb wrote
but - which part should I erase? The whole old if(missing(start)) {...} or
something else or nothing? I have tried all ways I could think of.

I also can't see where the new object s0 is used in the old code?

Any input on my problem would be very much appreciated!




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6 days later
ahs
# 
Great!
You can skip my question about s0 though, I found where it is being used, 
but I still struggle with the code and convergence problem.

I also found something here
http://biostat.mc.vanderbilt.edu/wiki/pub/Main/CharlesDupontStuff/newPolr.R
that seems like someone tried to fix it, but with this code I get mu
starting values out of range, nor do I get it right when I try to force
starting values.

If you got your code to work fine, you might have the answer to my problem.
If you want, maybe you could post your whole *fixed-polr.R*? :-)



I also can't see where the new object s0 is used in the old code?



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