How to choose data with three conditions to plot contour

I want to choose all the values from -50:1:50 with three conditons.

1, greater than zero(x>0),

2,smaller than -25 (x<-25)

3,replace the values between 0 to-25 with zero. x(x>=-25)=0;

But, i am unable to plot the contour from below code.

x = -50:1:50;
x = max(x,0) & min(x,-25)% logicals are wrong 
% please suggest

Error using griddata

Invalid input arguments

Answer 1

[Serhii Tetora]

x(x<0 & x>-25) = 0;

[MS]

Thank you.