axis text do not plot

load hyd3D

x3=hyd3D(:,12)
y3=hyd3D(:,1)
z3=hyd3D(:,11)
xv = linspace(min(x3), max(x3), 1000);
yv = linspace(min(y3), max(y3), 1000);
[X,Y] = meshgrid(xv, yv);
Z = griddata(x3, y3, z3, X, Y);

meshc(X,Y,Z,"facecolor", "k")

xlabel ("Delta x",'Color',"k",'fontsize',10)
ylabel ("T (K)",'Color','k','fontsize',10)            
zlabel ("Diff. (kJ/mole)",'Color','k','fontsize',10)            
set(gca,'fontsize',10)  
grid on    

<https://octave.1599824.n4.nabble.com/file/t373972/image_2021-05-02_132229.png> 



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