Axis labels dont show after text command

i would like to make a plot with a couple of lines with a text anotation with some value on the line. I made this work but when i want to add the axis labels they dont show up. If i comment out the text command the labels do show. what could the cause of this be and how could i solve this?

see the code and the plot below.

figure
for i = 1:length(wCool)
    zdiff = T(:,:,i) - 50*ones(length(cer.k),length(hCer));
    [x, y] = meshgrid(hCer,cer.k);
    C = contours(x, y, zdiff, [0 0]);
    xL = C(1, 2:end);
    yL = C(2, 2:end);
    zL = interp2(x, y, T(:,:,i), xL, yL);
    %if ~isempty(zL)
        [~,I] = min((abs(xL-5)));
        text(xL(I),yL(I)+4,sprintf('w=%s',num2str(wCool(i))),'HorizontalAlignment','center');
        line(xL, yL, zL, 'Color', 'k', 'LineWidth', 1);      
    %end
end
xlabel('Plate thickness [mm]'); ylabel('Thermal conductivity [W/mK]');

Answer 1

[VBBV]

Did you write custom function with name contours or you wanted to use Matlab's built-in function contour .?

% custom function or Matlab's contour 
C = contour(x, y, zdiff, [0 0]);