Permanent TIP on a PLOT:

The plot in the figure shows some the stock on the market, but with this plot i no understand which stock

corresponds to each point.

the name of stocks are in: symbols = {'','',''.....}

if i use legend(symbols), matlab assigns the first name to the frontier, no to stock. i tryed legend("frontier", symbols) but it doesnt works.

is it possible to enter the names of stocks in the tips of the plot? with x and y...

Answer 1

[DGM]

Store the handles, pass the handles to legend() and specify the names in a cell array.

h = plot(x,y);

for k = 1:K
    % ...
    h(k) = plot(thisx,thisy);
end
legend(h,{'this','that','other','etc'})

[Steven Lord]

Or set the DisplayName property of each line in the plot call then tell MATLAB to legend show. This puts the labeling information inside / near the plotting code, so there's less chance of them getting out of sync.

% Set up the data and graphics objects
x = 0:360;
k = 1:3;
h = gobjects(size(k));
axis([0 360 -1 1])
hold on

for whichK = k
    % If I wanted to change sine to cosine I'd have to do it in two places
    % in this command, not one place here and one place in the legend call
    h(whichK) = plot(x, sind(whichK*x), '-', ...
        'DisplayName', "sin(" + whichK + "*x)");
end
% No need to modify this line of code regardless of which function I plot
legend show

[Daniele Clementini]

in this way i should write every single stock (the stocks are more than 100).

for this reason i wrote:

symbols = {'amazon','netflix'.....}
    ......
    legend(symbols)

but the result is this:

Amazon is the first stocks, no the line. the line (is not in symbols) is a frontier.

i tryed like this:

    legend('frontier', symbols)

but it doesnt works

[Daniele Clementini]

I solved it this way. thanks to both.

symbols = {'','','',....}
ad = {'frontier'};
set = horzcat(ad,symbols);
legend(set, 'Location', 'best')