Hello, I had a schematic in Simulink/Matlab and I don't know why, but when I use sample time 1E-5 , i had a output graphic and when i use 2E-5 i get another result? why does it happen?

 

Different input, different output. Gee, imagine that.

Your not giving us much to go on. My first inclination is to wonder if you are aliasing the signal.

 

when I use sample time 1E-5 , i had a output graphic and when i use 2E-5 i get another result

Let me make a guess: Is the "another result" seeming like a compressed shape of the previous waveform, with the ratio of 2:1 ?

 

Without a schematic of the circuit or more details it's not possible to better answer your question.

 

Or at least show plots of the two different results you are getting. Why are you insisting that we be mind readers?