Why do my Simulink PV module simulation characteristics appear this way?

I have tried to simulate a PV module with Simulink for a change in radiation and I am unable to get the characteristics.The P-V and I-V characteristics I am expecting are <http://ecee.colorado.edu/~ecen2060/materials/simulink/PV/PV_module_model.pdf here> . I used the repeating sequence for my voltage source and the repeating sequence stair for my insolation. I get incomplete characteristics such as the figures below.

<</matlabcentral/answers/uploaded_files/192/P-V%20and%20I-V%20characteristicspage-0.jpg>>

_ . What could be the problem? I have changed the time values and output values for the repeating sequence source and the simulation time but without success. Anyone with an explanation?I have tried to simulate a PV module with Simulink for a change in radiation and I am unable to get the characteristics.The P-V and I-V characteristics I am expecting are <http://ecee.colorado.edu/~ecen2060/materials/simulink/PV/PV_module_model.pdf here> . I used the repeating sequence for my voltage source and the repeating sequence stair for my insolation. I get incomplete characteristics such as the figures below.

<</matlabcentral/answers/uploaded_files/192/P-V%20and%20I-V%20characteristicspage-0.jpg>>

_ . What could be the problem? I have changed the time values and output values for the repeating sequence source and the simulation time but without success. Anyone with an explanation? I have tried to simulate a PV module with Simulink for a change in radiation and I am unable to get the characteristics.The P-V and I-V characteristics I am expecting are <http://ecee.colorado.edu/~ecen2060/materials/simulink/PV/PV_module_model.pdf here> . I used the repeating sequence for my voltage source and the repeating sequence stair for my insolation. I get incomplete characteristics such as the figures below.

<</matlabcentral/answers/uploaded_files/192/P-V%20and%20I-V%20characteristicspage-0.jpg>>

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