I've seen several answers to this question, but none appear to work. The following example taken from another question, when pasted directly, gives this error message:
Error using cellstr (line 44) Element 1 is not a string scalar or character array. All elements of cell input must be string scalars or character arrays.
Error in legend>process_inputs (line 547) strings = cellstr(argin{n});
Error in legend>make_legend (line 306) [autoupdate,orient,location,position,children,listen,strings,propargs] = process_inputs(ha,argin); %#ok
Error in legend (line 259) make_legend(ha,args(arg:end),version);
Error using cellstr (line 44) Element 6 is not a string scalar or character array. All elements of cell input must be string scalars or character arrays.
Error in legend>process_inputs (line 547) strings = cellstr(argin{n});
Error in legend>make_legend (line 306) [autoupdate,orient,location,position,children,listen,strings,propargs] = process_inputs(ha,argin); %#ok
Error in legend (line 259) make_legend(ha,args(arg:end),version);
Error in Untitled (line 9) legend(lgd);:
time = linspace(0, 2*pi);
beta = 1:5;
y = sin(time(:)*beta);
for beta_val = beta
plot(time, y(:,beta_val));
hold on
lgd{beta_val} = sprintf('beta = %0.0f', beta(beta_val));
end
legend(lgd);
