mismatch between number of groups in data, and number of groups in model.

[Maria Cyniak-Cieciura]

Dear lavaan community,

I could not find this particular topic among messages, therefore I added another one. Did you encounter this kind of message:

lavaan ERROR: mismatch between number of groups in data, and number of groups in model.

I am running measurement invariance analysis using the code:

config_MPFI <- cfa(fit_MPFI_2, data=MPFI_791_1, estimator="MLM", , group = "education") and get this message:

Error in lavaan::lavaan(model = fit_MPFI_2, data = MPFI_791_1, group = "education",  :
  lavaan ERROR: mismatch between number of groups in data, and number of groups in model

I do not have any missing values in my data, and have only two values for education: 1 - lower than higher education, 2 = higher education.

The same error occured while comparing gender, again with only two values and without missing values. 

Is this something wrong with my dataset? 

I hope you can help.

Maria

[Edward Rigdon]

Can you share your model syntax? The error suggests that perhaps your model syntax points to more than two groups. Perhaps you have three labels inside a "c(...)" structure, or maybe an accidental comma.

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[Maria Cyniak-Cieciura]

Sure, this is my code for a simple analysis in a whole group:

model_MPFI_2 <- 'AC =~ MPFI_A1 + MPFI_A2 + MPFI_A3 + MPFI_A4 + MPFI_A5  
PM =~ MPFI_CH1 + MPFI_CH2 + MPFI_CH3 + MPFI_CH4 + MPFI_CH5
SC =~ MPFI_JA1 + MPFI_JA2 + MPFI_JA3 + MPFI_JA4 + MPFI_JA5
DF =~ MPFI_D1 + MPFI_D2 + MPFI_D3 + MPFI_D4 + MPFI_D5
VAL =~ MPFI_W1 + MPFI_W2 + MPFI_W3 + MPFI_W4 + MPFI_W5  
CA =~ MPFI_ZD1 + MPFI_ZD2 + MPFI_ZD3 + MPFI_ZD4 + MPFI_ZD5
EA =~ MPFI_U1 + MPFI_U2 + MPFI_U3 + MPFI_U4 + MPFI_U5
LPM =~ MPFI_BCH1 + MPFI_BCH2 + MPFI_BCH3 + MPFI_BCH4 + MPFI_BCH5
SCT =~ MPFI_SJA1 + MPFI_SJA2 + MPFI_SJA3 + MPFI_SJA4 + MPFI_SJA5
FUS =~ MPFI_F1 + MPFI_F2 + MPFI_F3 + MPFI_F4 + MPFI_F5
LVAL =~ MPFI_BW1 + MPFI_BW2 + MPFI_BW3 + MPFI_BW4 + MPFI_BW5
INAC =~ MPFI_BEZ1 + MPFI_BEZ2 + MPFI_BEZ3 + MPFI_BEZ4 + MPFI_BEZ5
GF =~ NA*AC + PM + SC + DF + VAL + CA
GINF =~ NA*EA + LPM + SCT + FUS + LVAL + INAC
GF ~~ 1*GF
GINF ~~ 1*GINF'

fit_MPFI_2 <- cfa(model_MPFI_2, estimator = "MLM", data = MPFI_791_1)

summary(fit_MPFI_2,fit.measures=TRUE,standardized=TRUE)

fitmeasures(fit_MPFI_2)

Maria

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Dr n. społ. Maria Cyniak-Cieciura

[Łukasz Stasiełowicz]

Too many commas before the group argument?

config_MPFI <- cfa(fit_MPFI_2, data=MPFI_791_1, estimator="MLM", , group = "education")

[Maria Cyniak-Cieciura]

Thanks, but this is not a solution. After removing the comas I still get the same error:

config_MPFI <- cfa(fit_MPFI_2, data=MPFI_CompACT_R, estimator="MLM", group = "education")

Error in lavaan::lavaan(model = fit_MPFI_2, data = MPFI_CompACT_R, group = "education",  :
  lavaan ERROR: mismatch between number of groups in data, and number of groups in model.
>

Maria 

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[Edward Rigdon]

Please show your model syntax. The problem is there, not in your function call.

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[rpc...@psu.edu]

When running the multiple group model, did you adjust the syntax for GF and GINF, or did you leave it the same as it was when running the single group model? If you didn't adjust the syntax, try c(NA,NA) for the first indicator of both variables and try c(1,1) when specifying their variance.

[Maria Cyniak-Cieciura]

I believe this is what I have already done:

model_MPFI_2 <- 'AC =~ MPFI_A1 + MPFI_A2 + MPFI_A3 + MPFI_A4 + MPFI_A5  
PM =~ MPFI_CH1 + MPFI_CH2 + MPFI_CH3 + MPFI_CH4 + MPFI_CH5
SC =~ MPFI_JA1 + MPFI_JA2 + MPFI_JA3 + MPFI_JA4 + MPFI_JA5
DF =~ MPFI_D1 + MPFI_D2 + MPFI_D3 + MPFI_D4 + MPFI_D5
VAL =~ MPFI_W1 + MPFI_W2 + MPFI_W3 + MPFI_W4 + MPFI_W5  
CA =~ MPFI_ZD1 + MPFI_ZD2 + MPFI_ZD3 + MPFI_ZD4 + MPFI_ZD5
EA =~ MPFI_U1 + MPFI_U2 + MPFI_U3 + MPFI_U4 + MPFI_U5
LPM =~ MPFI_BCH1 + MPFI_BCH2 + MPFI_BCH3 + MPFI_BCH4 + MPFI_BCH5
SCT =~ MPFI_SJA1 + MPFI_SJA2 + MPFI_SJA3 + MPFI_SJA4 + MPFI_SJA5
FUS =~ MPFI_F1 + MPFI_F2 + MPFI_F3 + MPFI_F4 + MPFI_F5
LVAL =~ MPFI_BW1 + MPFI_BW2 + MPFI_BW3 + MPFI_BW4 + MPFI_BW5
INAC =~ MPFI_BEZ1 + MPFI_BEZ2 + MPFI_BEZ3 + MPFI_BEZ4 + MPFI_BEZ5
GF =~ NA*AC + PM + SC + DF + VAL + CA
GINF =~ NA*EA + LPM + SCT + FUS + LVAL + INAC
GF ~~ 1*GF
GINF ~~ 1*GINF'

The loading of the first indicator of higher order factors is free and the variance of higher order factors is fixed to 1.

I have converted data to data.frame and checked that "education" is numeric and is coded as 1 (secondary education) and 2 (higher education). Everything looks good. 

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[Chesnut, Ryan]

Try:

GF =~ c(NA,NA)*AC + PM + SC + DF + VAL + CA

GINF =~ c(NA,NA)*EA + LPM + SCT + FUS + LVAL + INAC

GF ~~ c(1,1)*GF

GINF ~~ c(1,1)*GINF

Ryan P. Chesnut, PhD

Assistant Research Professor

Clearinghouse for Military Family Readiness

The Pennsylvania State University

402 Marion Place

University Park, PA 16802

 

Phone: 814-865-9637

Email: rpc...@psu.edu

Website: www.militaryfamilies.psu.edu

 

---

From: lav...@googlegroups.com <lav...@googlegroups.com> on behalf of Maria Cyniak-Cieciura <mcyniak-...@swps.edu.pl>
Sent: Tuesday, July 18, 2023 10:25 AM
To: lav...@googlegroups.com <lav...@googlegroups.com>
Subject: Re: mismatch between number of groups in data, and number of groups in model.

 

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[Maria Cyniak-Cieciura]

Dear Ryan,

This leads to another error: 

Error in lavaanify(model = FLAT, constraints = constraints, varTable = DataOV,  :
  lavaan ERROR: wrong number of arguments in modifier () of element GF=~AC
>

M. 

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[Edward Rigdon]

Where you have a multiplier or NA* in front of a variable, that is where lavaan would look for information about how many groups you have. Your structure is fine for just one group, but if there are multiple groups, then lavaan expects multiple multipliers or modifiers. So, for example, in the line that says:

GF =~ NA*AC + PM + SC + DF + VAL + CA

with two groups, you should write:

GF =~ c(NA,NA)*AC + PM + SC + DF + VAL + CA

and in the line that says:

GF ~~ 1*GF

with two groups, you should write:

GF ~~ c(1,1)*GF

This only changes the last 4 lines of your syntax, but I think that will solve your problem.

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[Maria Cyniak-Cieciura]

Dear Edward,

Following your suggestions, I have created the model:

model_MPFI_22 <- 'AC =~ MPFI_A1 + MPFI_A2 + MPFI_A3 + MPFI_A4 + MPFI_A5  

PM =~ MPFI_CH1 + MPFI_CH2 + MPFI_CH3 + MPFI_CH4 + MPFI_CH5
SC =~ MPFI_JA1 + MPFI_JA2 + MPFI_JA3 + MPFI_JA4 + MPFI_JA5
DF =~ MPFI_D1 + MPFI_D2 + MPFI_D3 + MPFI_D4 + MPFI_D5
VAL =~ MPFI_W1 + MPFI_W2 + MPFI_W3 + MPFI_W4 + MPFI_W5  
CA =~ MPFI_ZD1 + MPFI_ZD2 + MPFI_ZD3 + MPFI_ZD4 + MPFI_ZD5
EA =~ MPFI_U1 + MPFI_U2 + MPFI_U3 + MPFI_U4 + MPFI_U5
LPM =~ MPFI_BCH1 + MPFI_BCH2 + MPFI_BCH3 + MPFI_BCH4 + MPFI_BCH5
SCT =~ MPFI_SJA1 + MPFI_SJA2 + MPFI_SJA3 + MPFI_SJA4 + MPFI_SJA5
FUS =~ MPFI_F1 + MPFI_F2 + MPFI_F3 + MPFI_F4 + MPFI_F5
LVAL =~ MPFI_BW1 + MPFI_BW2 + MPFI_BW3 + MPFI_BW4 + MPFI_BW5
INAC =~ MPFI_BEZ1 + MPFI_BEZ2 + MPFI_BEZ3 + MPFI_BEZ4 + MPFI_BEZ5

GF =~ c(NA,NA)*AC + PM + SC + DF + VAL + CA

GINF =~ c(NA,NA)*EA + LPM + SCT + FUS + LVAL + INAC
GF ~~ c(1,1)*GF
GINF ~~ c(1,1)*GINF'

Then used:

fit_MPFI_22 <- cfa(model_MPFI_22, estimator = "MLM", data = MPFI_CompACT_R)

and got another error:

Error in lavaanify(model = FLAT, constraints = constraints, varTable = DataOV,  :
  lavaan ERROR: wrong number of arguments in modifier () of element GF=~AC
>

Maria 

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[Yves Rosseel]

Almost. Use this syntax, but add group = "education".

Yves.

> <mailto:edward...@gmail.com>> napisał(a):

>
> Where you have a multiplier or NA* in front of a variable, that is
> where lavaan would look for information about how many groups you
> have. Your structure is fine for just one group, but if there are
> multiple groups, then lavaan expects multiple multipliers or
> modifiers. So, for example, in the line that says:
> GF =~ NA*AC + PM + SC + DF + VAL + CA
> with two groups, you should write:
> GF =~ c(NA,NA)*AC + PM + SC + DF + VAL + CA
>
> and in the line that says:
> GF ~~ 1*GF
> with two groups, you should write:
> GF ~~ c(1,1)*GF
>
> This only changes the last 4 lines of your syntax, but I think that
> will solve your problem.
>
>
>
> On Tue, Jul 18, 2023 at 10:25 AM Maria Cyniak-Cieciura

> <mcyniak-...@swps.edu.pl <mailto:mcyniak-...@swps.edu.pl>>

> wrote:
>
> I believe this is what I have already done:
>
> model_MPFI_2 <- 'AC =~ MPFI_A1 + MPFI_A2 + MPFI_A3 + MPFI_A4 +
> MPFI_A5
> PM =~ MPFI_CH1 + MPFI_CH2 + MPFI_CH3 + MPFI_CH4 + MPFI_CH5
> SC =~ MPFI_JA1 + MPFI_JA2 + MPFI_JA3 + MPFI_JA4 + MPFI_JA5
> DF =~ MPFI_D1 + MPFI_D2 + MPFI_D3 + MPFI_D4 + MPFI_D5
> VAL =~ MPFI_W1 + MPFI_W2 + MPFI_W3 + MPFI_W4 + MPFI_W5
> CA =~ MPFI_ZD1 + MPFI_ZD2 + MPFI_ZD3 + MPFI_ZD4 + MPFI_ZD5
> EA =~ MPFI_U1 + MPFI_U2 + MPFI_U3 + MPFI_U4 + MPFI_U5
> LPM =~ MPFI_BCH1 + MPFI_BCH2 + MPFI_BCH3 + MPFI_BCH4 + MPFI_BCH5
> SCT =~ MPFI_SJA1 + MPFI_SJA2 + MPFI_SJA3 + MPFI_SJA4 + MPFI_SJA5
> FUS =~ MPFI_F1 + MPFI_F2 + MPFI_F3 + MPFI_F4 + MPFI_F5
> LVAL =~ MPFI_BW1 + MPFI_BW2 + MPFI_BW3 + MPFI_BW4 + MPFI_BW5
> INAC =~ MPFI_BEZ1 + MPFI_BEZ2 + MPFI_BEZ3 + MPFI_BEZ4 + MPFI_BEZ5
> GF =~ NA*AC + PM + SC + DF + VAL + CA
> GINF =~ NA*EA + LPM + SCT + FUS + LVAL + INAC
> GF ~~ 1*GF
> GINF ~~ 1*GINF'
>
> The loading of the first indicator of higher order factors is
> free and the variance of higher order factors is fixed to 1.
>
> I have converted data to data.frame and checked that "education"
> is numeric and is coded as 1 (secondary education) and 2 (higher
> education). Everything looks good.
>

> wt., 18 lip 2023 o 14:32 rpc...@psu.edu <mailto:rpc...@psu.edu>
> <rpc...@psu.edu <mailto:rpc...@psu.edu>> napisał(a):

>
> When running the multiple group model, did you adjust the
> syntax for GF and GINF, or did you leave it the same as it
> was when running the single group model? If you didn't
> adjust the syntax, try c(NA,NA) for the first indicator of
> both variables and try c(1,1) when specifying their variance.
> On Monday, July 17, 2023 at 7:20:23 PM UTC-4

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[Maria Cyniak-Cieciura]

Thank you very much, this works!

Maria

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