predictClass function is not found in lcmm

[glois]

I am trying to use predictClass to estimate posterior classification after runnig a hlme growth mixture model. Although I have downloaded lcmm and everything runs smoothly until I use the predictClass function which is not found.
Any clues why is this the case?

[nirgrahamuk]

you likely havent loaded the lcmm library before trying to use its functions

library(lcmm)

[glois]

lcmm library is loaded and all the other lcmm-related function run without a problem.

[nirgrahamuk]

can you run the following and report back

lcmm::predictClass

you should see

function (model, newdata, subject = NULL) 
{
    arguments <- as.list(model$call)
    argfunction <- as.character(arguments[[1]])

etc.

[glois]

I see the following:
Error: 'predictClass' is not an exported object from 'namespace:lcmm'

[nirgrahamuk]

you might have a too early package version.

> packageVersion("lcmm")
[1] ‘2.0.0’

?
according to the news

Changes in Version 1.9.3 (2021-06-17):

• new functions predictClass, predictRE and summaryplot

[glois]

Thanks that solved it!