contourlines in time format

how can I format my contour lines with clabel in time format like hh:mm?

Answer 1

[Grzegorz Knor]

It may be helpful to Analyze this code:

Z = 5+abs(peaks)/10;
[C,h] = contour(interp2(Z,4));
th = clabel(C,h);
set(th,'BackgroundColor',[1 1 .6],...
    'Edgecolor',[.7 .7 .7])

for k=1:length(th)
    tmp = get(th(k),'String');
    tmp = strrep(tmp,'.',':');    
    set(th(k),'String',tmp)
end

Answer 2

[Staffan]

It's not quite what I wanted. My contour lines are in decimal form, like 0.125 If I make cellstr(datestr(0.125,15)) then I get 3:00 which is what I want to be labelled along one of the lines.