Creating a legend inside a loop, using sprintf

70 次查看（过去 30 天）

positron96 2018-5-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/402812-creating-a-legend-inside-a-loop-using-sprintf

评论： Jan 2018-7-22

I am trying to make a legend for a plot with 'beta' number of curves. Basically, beta would be beta = [1 : 5] if I decided to have five curves, but it can be any number. I want to make a legend for that number of curves, and specifically do this by using a for loop (I know there are other ways that don't need for loops but I want to use a for loop for this one specifically). The code that I have (below) just gives me a legend for one curve "beta=1beta=2beta=3beta=4beta=5". I would need a legend for five curves. Basically the first curve would be beta = 1, the second curve would be beta = 2, and so on. Can someone help me?

for beta_val = beta
    plot(time, y);
    hold on
    lgd = sprintf('beta = %0.0f', beta);
    legend(lgd);
    end

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Star Strider 2018-5-28

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/402812-creating-a-legend-inside-a-loop-using-sprintf#answer_322174

在 MATLAB Online 中打开

Try something like this:

time = linspace(0, 2*pi);                                           % Create Data
beta = 1:5;                                                         % Create Data
y = sin(time(:)*beta);                                              % Create Data
for beta_val = beta
    plot(time, y(:,beta_val));
    hold on
    lgd{beta_val} = sprintf('beta = %0.0f', beta(beta_val));
end
legend(lgd);

6 个评论
显示 4更早的评论隐藏 4更早的评论

Star Strider 2018-5-28

As always, my pleasure!

Jan 2018-5-28

在 MATLAB Online 中打开

If this works, you can omit the loop:

plot(time, y);
lgd{beta_val} = sprintfc('beta = %0.0f', beta);
legend(lgd, 'Location','N')

请先登录，再进行评论。

更多回答（1 个）

Kai Åsvik 2018-7-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/402812-creating-a-legend-inside-a-loop-using-sprintf#answer_329843

I am getting this error message: "Function 'subsindex' is not defined for values of class 'cell'."

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Jan 2018-7-22

@Kai: The problem is solved already and the readers cannot guess, which code causes your problem. Please open a new thread and include the code and the complete error message.

请先登录，再进行评论。

请先登录，再回答此问题。