Lee carter model

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The warning message means you have given the function a factor where it expected a numeric value (max does not work on factors). I suggest that you learn how to use the str() function on your data so you know that you have imported it successfully before you give it to analysis functions. You may need to review the "Introduction to R" and "R Data Import/Export" PDF files that come with R if you don't know what a factor is or how to import numeric data.
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Hi everybody,

I'm running codes for for a Lee carter modeling. I compute the
demogdata function in the package demography.?
Age is a class of factor

Base<-demogdata(data=x,pop=y,ages=AGE,years=YEAR,type="mortality",label="City",name="Hommes",lambda=1)
?
Now, I try to run codes for lee carter model, and i always get the
following message:
Error in Summary.factor(c(1L, 2L, 24L, 35L, 46L, 57L, 68L, 79L, 90L,
101L, ?:?
? max not meaningful for factors

Please can you help to understand what means this message.?

Many Thanks

Achille

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