Error with adding Datatip

Hello,

I am trying to add a data tip based a data from a structure. However, whenever I do this it comes back with the error

"Dot indexing is not supported for variables of this type."

I was wondering what was I doing wrong.

row1 = dataTipTextRow('Nitrogen',Elements.Nitrogen);
row2 = dataTipTextRow('Phosphate',Elements.Phosphate);
row3 = dataTipTextRow('Potassium',Elements.Potassium);
Map.DataTipTemplate.DataTipRows(end+1) = row1;
Map.DataTipTemplate.DataTipRows(end+1) = row2;
Map.DataTipTemplate.DataTipRows(end+1) = row3;

[Walter Roberson]

What is class(Map) ?

I suspect that Map might be empty, []

[Andrew Luce]

Sorry forgot to add this line, it is for a color map

C= [0 1 0; 0.5 0 0; 1 1 0; 0 0 1]; % Color map

Map = colormap(C)

Answer 1

[Walter Roberson]

C= [0 1 0; 0.5 0 0; 1 1 0; 0 0 1]; % Color map 
Map = colormap(C)

Map = 4×3

0 1.0000 0 0.5000 0 0 1.0000 1.0000 0 0 0 1.0000

class(Map)

ans = 'double'

The return from colormap() is the content of the color map that is in effect after any parameters to colormap() has been processed.

I wonder if you are trying to attach a datatip to a colorbar? colorbar() is not a Chart object and does not support DataTipTemplate