change display name of a data

I am new begginer in Matlab and i have a problem with naming the data on graphs.

Let say i have 5 variables to plot and call teh " A, B, C, D, E "

i plot them on a figure and name them using legend command

legend ('A','B','C','D','E')

i want to change the fourth variable name. Let say i want it to display as "Fourth Variable"

how can i do this ??

Thanks for helping

Answer 1

[José-Luis]

You could modify only the text, but that is bound to wreak havok on the display:

 plot(rand(10,5));
 l_str = {'A','B','C','D','E'};
 lH = legend(l_str);
 pos_to_change = 4;
 allH = get(lH,'children');
 set(allH(numel(allH) - ( (pos_to_change - 1) * 3 ) ),'String','yourText');

It would probably be easier to update the entire legend:

 new_str = l_str;
 new_str(4) =  {'yourText'};
 legend(new_str);