Issues with summary output on Jupyter Notebook since update

[Gold Okafor]

Hello,

Ever since the recent lavaan update, the lavaan summary function does not seem to work when you run r on Juypter Notebook. Instead of the normal summary for a cfa(), it provides a short list of the summary variables.  Prior to the update, it has been working fine. My r, Jupyter Notebook, and computer are all up-to-date. Below is example code and attached is a screenshoot. Any help would be greatly appreciated. 

visual =~ x1 + x2 + x3
textual =~ x4 + x5 + x6

speed =~ x7 + x8 + x9

HS.model <- ' visual  =~ x1 + x2 + x3
              textual =~ x4 + x5 + x6
              speed   =~ x7 + x8 + x9 '

fit <- cfa(HS.model, data = HolzingerSwineford1939)

summary(fit, fit.measures = TRUE)

Output:

$header$lavaan.version'0.6-12'$sam.approachFALSE$optim.method'nlminb'$optim.iterations35$optim.convergedTRUE$optim$estimator'ML'$estimator.args

$optim.method'nlminb'$npar21$eq.constraintsFALSE$nrow.ceq.jac0$nrow.cin.jac0$nrow.con.jac0$con.jac.rank0$data$ngroups1$nobs301$test$standard =$test'standard'$stat85.3055217699727$stat.group85.3055217699727$df24$refdistr'chisq'$pvalue8.50255321704907e-09

Best,

Gold Okafor

[Yves Rosseel]

First some background:

In >= 0.6-12, the summary() function is completely silent (following
'standard' R protocols). This means that

out <- summary(fit, fit.measures = TRUE)

should not print anything to the screen any longer. Instead, a list with
ingredients is stored in 'out'. You can then 'print' the content of out
by just typing

out

What 'should' happen is that R finds the corresponding printing
function, which is

lavaan:::print.lavaan.summary(out)

This should all happen automatically when you just type

summary(fit, fit.measures = TRUE)


I have no experience with Jupyter Notebooks. In anycase, reboot first.
If you type

out <- summary(fit, fit.measures = TRUE)

what is the output of

class(out)?

It should be "lavaan.summary" "list". Do you get any output if you use

lavaan:::print.lavaan.summary(out)?

lavaan is just using R's standard S3 system to dispatch the print()
function to print.lavaan.summary(). Is Jupyter Notebook somehow
interfering with this print() function?

Yves.

[Gold Okafor]

Hi Yves,

Thank you so much for your timely response. I was able to temporarily address this issue by reverting the lavaan package to the previous version. I have an upcoming deadline that requires me to use the lavaan package a lot. Once that deadline has passed, I will try your suggestions and report back.

Best,

Gold Okafor (she/her)

PhD Candidate, Social/Personality Program

Department of Psychology

University of California, Berkeley

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