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Error with adding Datatip

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Andrew Luce
Andrew Luce 2021-8-8
回答： Walter Roberson 2021-8-9
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;
  2 个评论
Walter Roberson
Walter Roberson 2021-8-9
What is class(Map) ?
I suspect that Map might be empty, []
Andrew Luce
Andrew Luce 2021-8-9
编辑：Andrew Luce 2021-8-9
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)

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回答（1 个）

Walter Roberson
Walter Roberson 2021-8-9
Ran in:
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

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