Legend Error. Need Help ASAP. Why is the error coming? What am I doing wrong?

 x = 1:1:6;
>> y1 = x.^2;
>> y2 = (x.*(x+2))/2;
>> y3 = (x.*(x+2))/3;
>> y4 = x;
>> legend ('NOON', 'BAT' , 'FLAT', 'Binomial');
Warning: Plot empty. 
> In legend at 286 
>> plot (x, y1, x, y2, x, y3, x, y4);
>> legend ('NOON', 'BAT' , 'FLAT', 'Binomial');
Warning: Plot empty. 
> In legend at 286 
>>

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

Answer 1

[Azzi Abdelmalek]

 Use plot before a legend 

legend ({'NOON', 'BAT' , 'FLAT', 'Binomial'})

[Akshit]

>> x = 1:1:6;
>> y1 = x.^2;
>> y2 = (x.*(x+2))/2;
>> y3 = (x.*(x+2))/3;
>> 
>> y4 = x;
>> plot (x, y1, x, y2, x, y3, x, y4);
>> legend ({'NOON', 'BAT' , 'FLAT', 'Binomial'});

Warning: Plot empty. > In legend at 286 >>

Still the same error

[Azzi Abdelmalek]

Maybe you have used plot function as a variable in your code. Check this

clear plot
%plot your data
%Add legend

[Bruno Pop-Stefanov]

I ran this code and I get the plot with no error. Execute the following to clear previous variables or plots before running your code:

clear all
close all
clc