I was trying to add xlabel to subplots with secondary axis but i kept getting errors.
figure
p = subplot(1,2,1);
plot (tmin,capex,'r-o');
xlabel(p,'\Delta T_{min}')
ylabel('Total Capital Cost ($)')
yyaxis right
plot(tmin,opex,'g-*');
legend ('Total Capital Cost','Utility Cost/s')
ylabel('Utility Cost ($/s)')
ax2 = subplot(1,2,2)
...
The error message is as follows.
Function 'subsindex' is not defined for values of class 'matlab.graphics.axis.Axes'.
Error in Untitled (line 44)
xlabel(p,'\Delta T_{min}')
But without the xlabel, the graph appears perfectly with the ylabels and legend
