Unrecognized function or variable 'X'.

fsurf(X,Y,exp(-2*x.^4+2*x.^2-x.y.^1-y.^2))

i try to plot but the system says:

>> matlabplot

Unrecognized function or variable 'X'.

Error in matlabplot (line 7)

fsurf(X,Y,exp(-2*x.^4+2*x.^2-x.y.^1-y.^2))

Answer 1

[KSSV]

fun = @(x,y)  exp(-2*x.^4+2*x.^2-x.*y.^1-y.^2) ; 
fsurf(fun)

[Yuemeng Wang]

omg thank you so much!

[Yuemeng Wang]

do you maybe know how to make the x y a bit amaller? as in not use the default -5~5?

thank you!!!

[KSSV]

Read about the function fsurf, there is an option to specify the intervel. Also you can generate the same using surf. Read about surf as well.