I'm getting "Index in position 1 is invalid. Array indices must be positive integers or logical values." in my code

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Ivan
Ivan 2024-9-4
评论： Ivan 2024-9-4
Hi everyone, I'm developing a code that needs to use a linear mixed effects regression. When a I try to use a table in this tool im getting an error message "Index in position 1 is invalid. Array indices must be positive integers or logical values." Can you help me to solve it?
data_resi_inter = readtable('Residuales_inter.xlsx');
data_resi_intra = readtable('Residuales_intra.xlsx');
%% Regresion y obtencion de Residuales Inter evento (Interplaca)
lme_inter = fitlme(data_resi_inter,'res_PGA ~ 1 + (1|EQID)');
[beta_inter,betanames_inter,Fstats_inter] = fixedEffects(lme_inter);
c0_inter = beta_inter;
SE(i,1) = Fstats_inter.SE;
[B_inter,Bnames_inter,Rstats_inter] = randomEffects(lme_inter);
eta_inter = B_inter;
error_B_inter = (Rstats_inter.Upper-Rstats_inter.Lower)/2;
[psi_inter,mse_inter,stats_inter] = covarianceParameters(lme_inter)

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采纳的回答

Zinea
Zinea 2024-9-4
The error message you're encountering indicates that there's an issue with the index 'i' in the following line:
SE(i,1) = Fstats_inter.SE;
This suggests that 'i' is either undefined, zero, or negative at the time this line is executed. Array indices in MATLAB must be positive integers. It is necessary to ensure that 'i' is defined and initialized before you use it.

更多回答（1 个）

Shivam
Shivam 2024-9-4
编辑：Shivam 2024-9-4
Hi Ivan,
Upon investigation of the error through the provided script and the excel files, I see that you are trying to index into SE with paramters as i and 1.
Please know that since first parameter i is not defined in the script before that line (assuming the provided script is the only code), the first parameter is considered to be a complex no. i.e.
0.0000 + 1.0000i
Please ensure that you use the correct positive (>0) index parameter to save the Fstats_inter.SE data. e.g.
SE(1,1) = Fstats_inter.SE
I hope it resolved your query.

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