How to plot x-axis in both Celsius and Kelvin?

Do you know a simple way how to plot y where axis at bottom is in Kelvin and axis at top is on Celsius?

y = [1 2 3 4 5 6 7 8 9 10]; % variable dependent on temperature
t = [10 20 30 40 50 60 70 80 90 100]; % temperature in degC
T = t + 273.15; % temperature in Kelvin

figure(1)
plot(t,y)
hold on
plot(T,y) % doesnt work so well
xlabel('Temperature, K')
xlabel('Temperature, degC')

I found this link but the example is a bit too compicated..

https://se.mathworks.com/help/matlab/creating_plots/graph-with-multiple-x-axes-and-y-axes.html

Thank you for help!

[Rik]

Unfortunately, that is the only 'real' way. You have an alternative: use multi-line tick labels, but I don't think that is much less complicated.

[Star Strider]

I agree with Rik — it's definitely not simple.

If you want to experiment with that code, this version (adapted to your data) works:

y = [1 2 3 4 5 6 7 8 9 10]; % variable dependent on temperature
t = [10 20 30 40 50 60 70 80 90 100]; % temperature in degC
T = t + 273.15; % temperature in Kelvin
figure(1)
ax1 = gca; % current axes
ax1_pos = ax1.Position; % position of first axes
ax2 = axes('Position',ax1_pos,...
    'XAxisLocation','top',...
    'Color','none');
line(t,y, 'Parent',ax1, 'Color','b')
line(T,y, 'Parent',ax2, 'Color','r')
xlabel(ax2,'Temperature, K')
xlabel(ax1,'Temperature, degC')
fpos = get(gcf, 'Position');
set(gcf, 'Position',fpos+[0 -150 0 150])            % Create Room For The Top X-Axis Label

The lines are not collinear because the top and bottom x-ticks are rounded to integers, so the Kelvin (red) line plots from 280 to 380, rather than 283.15 to 373.15.

[Martin Privara]

Thank you Star. I've tried to use your code but I get two lines instead of one. Anyways I don't think I will be able to use it in my code. I have much more coplicated plots. Matlab has a lot to learn from Excel with respect to miltiple x-axis :)

[Star Strider]

My pleasure.

I mentioned that and what I believe is the reason for the two lines not being collinear.

They do line up (are collinear) if you add this line somewhere near the end of that code:

ax2.XLim = [min(T) max(T)];

[Martin Privara]

It works now! Let's see how it behaves with more lines..

[Star Strider]

Great!

The XLim call must be after the last line call. The arguments must be the minimum and maximum of all the independent variable vectors in all your line calls.