Dear All, I have a stupid problem but I am not able to solve it.
For a complex model I am working to, I need to define some parameters, some functions, other functions that are function of the previous functions by their derivative or integration, than I need to do a lot of things the easiest one is a VectorPlot. In the easy example attached you can see the problem.
I need that all is define only at the end of the calculations, so I can change a parameter or a function and obtained directly the plot without re-input all the parameters and functions. I have tried Hold, Evaluate, Defer, but in the real problem I am working on I didn't obtained the desire solution. Thanks
Attachment: Untitled-1.nb, URL: ,