i have a question regarding legend for movies. This is my code:

```
fig = figure();
for i = 1: 70000
plot(signal1)
hold on;
plot([i,i],[-5,5])
plot(signal2,'r')
hold off;
title('\fontsize{14} my data');
legend('signal1','signal2');
axis tight;
f(i) = getframe(fig);
end
```

The legend shows the same colors for the first two things I plot. if I plot more it works for the other plots. Is there a trick I don't know?

Answer:

The strings defined in the `legend`

command are assigned in order of the plots being generated. This means that your first string `'signal1'`

is assigned to the plot for `signal1`

and the second string `'signal2'`

is assigned to the vertical line.

You have two possibilities to fix this problem.

- Execute
`plot`

for the vertical line after the plot for the two signals. - Use handles to the plots to assign the legends directly.

Here is an example of **changing the order**:

```
plot(signal1)
hold on;
plot(signal2,'r')
plot([i,i],[-5,5],'k')
hold off;
legend('signal1','signal2');
```

Here is an example that **uses handles** (`sp1`

and `sp2`

):

```
sp1 = plot(signal1)
hold on;
plot([i,i],[-5,5],'k')
sp2 = plot(signal2,'r')
hold off;
title('\fontsize{14} my data');
legend([sp1,sp2],'signal1','signal2');
```

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