How to add a string array on a chart?

I would like to add 3 lines of text stored in a cell array to my chart, but failed to display it onto the chart.

MATLAB complained that "Cell array can contain only non-empty character vectors, string vectors, or numbers."

The implementation is like:

% point is a 1 x 6 string array
point = "4^1+1"    "4^2+1"    "4^3+1"    "4^4+1"    "4^5+1"    "4^6+1"
txt = { sprintf('U0 = %.1f', U0), sprintf('Gamma = %.1f', gamma), ...
        ["Grid points = " point] };
xlim = get(gca,'xlim');
ylim = get(gca,'ylim');
% Add text to chart
text(xlim(1)*2, ylim(2)*0.01, txt, 'FontSize', 16);

Result:

Error using text
Cell array can contain only non-empty character vectors, string vectors, or numbers.

Error in assignment2 (line 76)
text(xlim(1)*2, ylim(2)*0.01, txt, 'FontSize', 16);

The content of 'txt' is:

txt =

  1×3 cell array

    {'U0 = -10.0'}    {'Gamma = 1.0'}    {1×6 string}

My question is, how to add a string array onto the chart?

or how to convert a string array to a string vector so that it satisfied the requirements of cell array?

Thanks in advance!

Answer 1

[Ameer Hamza]

Try this

point = "Grid points = " + sprintf('4^%d ', 1:6);
txt = { sprintf('U0 = %.1f', 1), sprintf('Gamma = %.1f', 2), ...
        point};
xlim = get(gca,'xlim');
ylim = get(gca,'ylim');
% Add text to chart
text(xlim(1)*2, ylim(2)*0.01, txt, 'FontSize', 16);

[hmhuang]

Thanks! You solved my problem.

[Ameer Hamza]

I am glad to be of help!