mimi25

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This is what I get :/

Sorry, but I don't understand what do you mean

thank you for your reply,

ok, thank you very much.

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Ok,

exactly,

thank you for your reply,

hello everyone So, I have two functions that contain several parameters (including 1 single parameters is common between the two functions) I adjusted the two functions separately and I get a good curves, by cons I don't find the same value of the common parameter. So, I need can be adjusted both functions together. You will find enclosed rooms more details. Thank you in advance for your help.