Re: object FLAT not found

[Josephine Grenzer]

Am Montag, 10. Februar 2014 16:51:45 UTC+1 schrieb Josephine Grenzer:

Hello :)

i'm new in statistics in R still learned some basics and easy models.

I downloaded the lavaan package and followed the tutorial of Jim Grace (http://www.structuralequations.org/)

read data and define model was fine but when i fit the model i got a warning

> mod1.fit<-sem(mod1, data=k.dat)

Error in lavaan::lavaan(model = mod1, data = k.dat, model.type = "sem",  : 

  object 'FLAT' not found

I use R Studios and R 3.0.2

if i tip sem and lavaan::lavaan i get the function code so i would expact that the instalation was ok 

i do not know what could be wrong in my syntax :(

So please help me :D

[yrosseel]

On 02/10/2014 05:00 PM, Josephine Grenzer wrote:
> mod1.fit<-sem(mod1, data=k.dat)
> Error in lavaan::lavaan(model = mod1, data = k.dat, model.type =
> "sem", :
> object 'FLAT' not found

Hm. Can we see your full R syntax?

Yves.

[Josephine Grenzer]

this is my script

k.dat<-read.csv("./Keeley_rawdata_select4.csv")

names(k.dat)

head(k.dat)

library(lavaan)

mod1 <- 'cover ~ age + firesev'

mod1.fit <- sem(mod1, data=k.dat)

Am Montag, 10. Februar 2014 16:51:45 UTC+1 schrieb Josephine Grenzer:

Hello :)

i'm new in statistics in R still learned some basics and easy models.

I downloaded the lavaan package and followed the tutorial of Jim Grace (http://www.structuralequations.org/)

read data and define model was fine but when i fit the model i got a warning

> mod1.fit<-sem(mod1, data=k.dat)

Error in lavaan::lavaan(model = mod1, data = k.dat, model.type = "sem",  : 

  object 'FLAT' not found

[Josephine Grenzer]

It must be something with my data? The lavaan tutorial worked using the data included in the package

[yrosseel]

On 02/10/2014 05:50 PM, Josephine Grenzer wrote:
> this is my script
>
> k.dat<-read.csv("./Keeley_rawdata_select4.csv")
> names(k.dat)
> head(k.dat)
> library(lavaan)
> mod1 <- 'cover ~ age + firesev'

> mod1.fit <- sem(mod1, data=k.dat)

Hm. Nothing wrong with this. Could you send me the data (or just a
snippet, just enough to replicate your error?

Yves.

[Josephine Grenzer]

I fixed the Problem it was a biginner's mistake ^^ 

[Chris Gibbons]

Can you let us know what the beginner's mistake was? I now have the same error for my CFA model 

[yrosseel]

On 02/17/2014 03:47 PM, Chris Gibbons wrote:
> Can you let us know what the beginner's mistake was? I now have the same
> error for my CFA model

Could either of you send me the R script? I'm curious what triggers this
too.

Yves.

[Josephine Grenzer]

In my case it was a syntax error used "  '' looks same but are different :D

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[cas...@jvrafrica.co.za]

Hi 

Is there any news on what causes this problem. I ran a cfa model successfully, but get the same feedback when trying to run the measurement invariance command on the same model. Any ideas?

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[yrosseel]

On 02/21/2014 01:43 PM, cas...@jvrafrica.co.za wrote:
> Hi
>
> Is there any news on what causes this problem. I ran a cfa model
> successfully, but get the same feedback when trying to run the
> measurement invariance command on the same model. Any ideas?

just for future reference: the problem here was that the first argument
of the measurementInvariance() function must be the model syntax (not a
fitted object).

Yves.

[StazLuver]

Hello,

I don't understand the solution. Here's my syntax and error message in R Studio:

## First, defining my latent variables goes off without a hitch (except that I learned that " works and ' does not, contrary to the example provided on p. 12 of this article http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3996839/pdf/nihms419622.pdf )

> PANAS.model <- "NA=~ P1Ups + P2Hos + P4Ash + P6Ner + P9Afr+ A2P1Ups + A2P2Hos + A2P4Ash + A2P6Ner + A2P9Afr+ A3P1Ups + A3P2Hos + A3P4Ash + A3P6Ner + A3P9Afr PA=~ P3Ale + P5Ins + P7Det + P8Att + P10Act +  A2P3Ale + P5Ins + A2P7Det + A2P8Att + A2P10Act + A3P3Ale + P5Ins + A3P7Det + A3P8Att + A3P10Act"

## Then I get this error when I try to fit the model

> Fit <- cfa(PANAS.model , data = joliedisssimpilot6272015clean2,std.lv=TRUE)

Error in ~P1Ups + P2Hos + P4Ash + P6Ner + P9Afr + A2P1Ups + A2P2Hos +  : 

  object 'P1Ups' not found

## It keeps on not finding P1Ups when it is clearly there. I tried to make a data frame with these variables (even though that's all that's in the data set), and get a similar error:

> Data <- data.frame( P1Ups =P1Ups, P2Hos= P2Hos, P4Ash =P4Ash, P6Ner =P6Ner, P9Afr =P9Afr, A2P1Ups = A2P1Ups, A2P2Hos = A2P1Ups,  A2P4Ash = A2P4Ash,  A2P6Ner = A2P6Ner,  A2P9Afr = A2P9Afr,  A3P1Ups = A3P1Ups,  A3P2Hos = A3P2Hos,  A3P4Ash = A3P4Ash,  A3P6Ner = A3P6Ner,  A3P9Afr= A3P9Afr, P3Ale = P3Ale, P5Ins = P5Ins,  P7Det = P7Det,  P8Att = P8Att,  P10Act = P10Act,   A2P3Ale = A2P3Ale, P5Ins = P5Ins,  A2P7Det = A2P7Det,  A2P8Att = A2P8Att,  A2P10Act= A2P10Act,  A3P3Ale = A3P3Ale,  P5Ins = P5Ins,  A3P7Det = A3P7Det,  A3P8Att = A3P8Att,  A3P10Act= A3P10Act)

Error in data.frame(P1Ups = P1Ups, P2Hos = P2Hos, P4Ash = P4Ash, P6Ner = P6Ner,  : 

  object 'P1Ups' not found

> 

## Any thoughts/ help are greatly appreciated!