Creating a legend inside a loop, using sprintf

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positron96
positron96 2018-5-27
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

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采纳的回答

Star Strider
Star Strider 2018-5-28
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
Jan
Jan 2018-5-28
If this works, you can omit the loop:
plot(time, y);
lgd{beta_val} = sprintfc('beta = %0.0f', beta);
legend(lgd, 'Location','N')

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更多回答（1 个）

Kai Åsvik
Kai Åsvik 2018-7-22
I am getting this error message: "Function 'subsindex' is not defined for values of class 'cell'."
  1 个评论
Jan
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.

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