st: Principal Components Analysis with Multiple Imputation

[Tyler Boone <tylergboone@gmail.com>]

Hello Statalist:
I am attempting to do principal components analysis on a dataset with
multiple imputation but am getting frustrated through a series of
error messages.  The imputations go through but then I get that the
specific matrices are not defined, the errors are below at the end of
the code.  Can anyone offer some assistance?

Thanks!
TB

mi set wide

mi register imputed  CO2_t_pc_ln DPT_Immunization_WDI_07
Electric_Capacity_C98 Electric_Power_Cons_WDI_07 energykgpcbanks
Ext_Neg_Growth FDI_percentGDP_WDI_07 fertilityrate07ipolate
GDP_growth_impute IMR_ln Illiteracy_imputed Life_Expectancy_WDI_07
Life_Expectancy_f_m measleswdi07_100ln NOSCHO25_Cohen_ipolate
Openness_K_PWT PRIM25_Cohen_ipo_cent_100_ln Risk_Euromoney
SEC25C_Cohen_ipolate Schooling_total_ipolate Sulfur_emission_pc_ln
TY25_Cohen_ipolate Telephone_Mainlines_WDI_07 Trade_WDI_07
Volatility_growth Volatility_regime female_male_ratio

mi impute mvn CO2_t_pc_ln DPT_Immunization_WDI_07
Electric_Capacity_C98 Electric_Power_Cons_WDI_07 energykgpcbanks
Ext_Neg_Growth FDI_percentGDP_WDI_07 fertilityrate07ipolate
GDP_growth_impute IMR_ln Illiteracy_imputed Life_Expectancy_WDI_07
Life_Expectancy_f_m measleswdi07_100ln NOSCHO25_Cohen_ipolate
Openness_K_PWT PRIM25_Cohen_ipo_cent_100_ln Risk_Euromoney
SEC25C_Cohen_ipolate Schooling_total_ipolate Sulfur_emission_pc_ln
TY25_Cohen_ipolate Telephone_Mainlines_WDI_07 Trade_WDI_07
Volatility_growth Volatility_regime female_male_ratio , add (5)


. mi estimate, cmdok: pca CO2_t_pc_ln DPT_Immunization_WDI_07
Electric_Capacity_C98 Electric_Power_Cons_WD
> I_07 energykgpcbanks Ext_Neg_Growth FDI_percentGDP_WDI_07 fertilityrate07ipolate GDP_growth_impute IMR_l
> n Illiteracy_imputed Life_Expectancy_WDI_07 Life_Expectancy_f_m measleswdi07_100ln NOSCHO25_Cohen_ipolat
> e Openness_K_PWT PRIM25_Cohen_ipo_cent_100_ln Risk_Euromoney SEC25C_Cohen_ipolate Schooling_total_ipolat
> e Sulfur_emission_pc_ln TY25_Cohen_ipolate Telephone_Mainlines_WDI_07 Trade_WDI_07 Volatility_growth Vol
> atility_regime female_male_ratio
matrix e(b) is not set
matrix e(V) is not set
r(301);
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