How to display legend

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jy tan 2012-3-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/32530-how-to-display-legend

Let's say i use a for loop for different values of alpha, each alpha will generate different results. How will I use the legend to differentiate the colors

for alpha=0.1:0.1:1

plot(T,CF); legend('alpha=0.x');

end

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回答（1 个）

Walter Roberson 2012-3-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/32530-how-to-display-legend#answer_41107

在 MATLAB Online 中打开

alphas = 0.1:0.1:1;
for alpha = alphas
  plot(T,CF);  %presumed depends on alpha
end
legendstr = cellstr( num2str( alphas(:), 'alpha=%.1f' ) ) );
legend( legendstr );

Note: it is important for this purpose that the first parameter to num2str() be a column vector and not a row vector.