There are multiple outputs (18) in my model. After I run sensitivity analysis with Sobol’ indices in UQLab 2.1.0, the total variance of the analysis results (1*18) are all 0 except the last one (more than 8.3).

Is this expected?

Actually I’m trying to calculate aggregated Sobol’ indices through the total variance, is it already included in the results?

I got similar results after running example “uq_Example_Sensitivity_04_MultipleOutputs.m”, listed as below:
0 0 0 0 0 0 0 0 7.87898251578865e-06
When we calculate sensitivity indices for each output, we need to know its total variance. so this result looks incorrect to me.