MATLAB: Subscripts and supercripts in heatmap axis labels

Question

Hi, I am having trouble adding subscripts and supercripts to the axis labels on my heatmap. At the moment my code looks like this:

heatmap(string(round(log10(range_par_N),2)),string(round(log10(range_par_C2),2)),heatmap_data_Nconc,'CellLabelColor','none','GridVisible','off');
colormap(parula);
xlabel('log K^{N}_{N}');
ylabel('log K^N _C2');

But the axis labels look like this:

I have also tried doing:

heatmap(string(round(log10(range_par_N),2)),string(round(log10(range_par_C2),2)),heatmap_data_Nconc,'CellLabelColor','none','GridVisible','off');
colormap(parula);
h = xlabel('log K^{N}_{N}');
set(h,'Interpreter','tex');

But I get the following error:

Error using matlab.graphics.chart.Chart/xlabel

Output arguments are not supported when using xlabel with heatmap.

Error in xlabel (line 32)

hh = xlabel(ax,args{:});

The subscript and supercript work fine in the 'tex' style for all my other plots, but doesn't work for heatmap. Is it just that these are not suported for heatmaps?

I am using version R2018b.

I am new at using Matlab, so apologies if I have missed something obvious.

Answer 1

I haven't really found the answer for this through using 'heatmap', but a colleague told me that using 'surf' with the command view(0,90) gives an equivalent to heatmap, and this supports the subscripts and superscripts.

z = surf(round(log10(range_par_N),2),round(log10(range_par_C2),2),heatmap_data_div);
view(0,90);
d = colorbar;
z.EdgeColor = 'none';
xlabel('log K^{N}_{N}');
ylabel('log K_{C_2}^N');
d.Label.String = 'Number of protocell divisions per day at equilibrium';
d.Label.FontSize = 16;
set(gca,'FontSize',14);