How to plot gradient bar in MATLAB

How to draw the above gradient bar?

Answer 1

[KSSV]

x = [0.5 1 1.5] ;
y = linspace(0,200) ;
[X,Y] = meshgrid(x,y) ;
Z = X+Y ;
figure(1)
surf(X,Y,Z) ;
colormap(jet) ;
shading interp ;
view(2)
x = [0.5 1 1.5] ;
y = linspace(0,200) ;
y(y>80 & y<120) = NaN ;
[X,Y] = meshgrid(x,y) ;
Z = X+Y ;
figure(2)
surf(X,Y,Z) ;
colormap(jet) ;
shading interp ;
view(2)