MATLAB: Contourf colour doesn’t display correct values.

contourf

I have a contourf plot shown below, the problem I'm having is that the ring is supposed to be almost white; the values in the matrix I'm plotting are all between 50 and 60. Where as the current corresponding colour is seemingly between -50 and -60. I've plotted it using the following code:
contourf(x_axis, y_axis,P_INDEX)
colormap(hot)
colorbar
caxis([-60 60])
I've also tried plotting it using abs(P_INDEX) but it gives the same output. Does anyone know what the issue could be?

Best Answer

I have tried to plot the similar contour using your program and I am getting the correct contour.
   P=randi(60,20,30);
    P(P<50)=52;
    contourf(P)
    colormap(hot)
    colorbar
    caxis([-60 60])
I think, there might be some mistake in P_INDEX values. I request you to cross check (manually) the P_INDEX values. This could be the error..
If your problem is not resolved yet, then please attach the .mat file which contains P_INDEX, y_axis and x_axis.
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