plot legend and axis does not display, also i need to assign numbers to each of the points such as PU(1 to 20) and SU(1 TO 20)

Find the codes below, i run in matlab and plot legend does not display. Also i need to assign numbers to each points exactly like the attached sample file. Can anybody help

%% Sample points considering a 10 × 10 area, consisting of 20 secondary usesrs (SUs) and 20 primary users (PUs) randomly distribute

SU = rand (20) * 10; % sample points

PU = rand (20) * 10; % sample points

%% figures

plot (SU (:, 1), SU (:, 2), '+ k' )

hold on

plot (PU (:, 1), PU (:, 2), '* k' )

hold off

text (SU (:, 1), SU (:, 2), compose ( '$ \\% d $' , 1: size (SU, 1)), 'Horiz' , 'left' , 'Vert' , ' middle ' , ' Interpreter ' , ' latex ' )

text (PU (:, 1), PU (:, 2), compose ( '$ \\% d $' , 1: size (PU, 1)), 'Horiz' , 'left' , 'Vert' , ' middle ' , ' Interpreter ' , ' latex ' )

legend ( 'SU' , 'PU' )

[Felix Obite]

many thanks, working perfectly now

Answer 1

[Voss]

Avoid having extra spaces in character vectors.

MATLAB treats

' Interpreter '

differently than it treats

'Interpreter'

I removed those extra spaces below and also included a Location for the legend:

%% Sample points considering a 10 × 10 area, consisting of 20 secondary usesrs (SUs) and 20 primary users (PUs) randomly distribute
SU = rand (20) * 10; % sample points  
PU = rand (20) * 10; % sample points
%% figures
plot (SU (:, 1), SU (:, 2), '+ k' )
hold on
plot (PU (:, 1), PU (:, 2), '* k' )
hold off
text (SU (:, 1), SU (:, 2), compose ( '$ \\% d $' , 1: size (SU, 1)), 'Horiz' , 'left' , 'Vert' , 'middle' , 'Interpreter' , 'latex' )
text (PU (:, 1), PU (:, 2), compose ( '$ \\% d $' , 1: size (PU, 1)), 'Horiz' , 'left' , 'Vert' , 'middle' , 'Interpreter' , 'latex' )
legend ( 'SU' , 'PU' , 'Location', 'Southwest')

[Felix Obite]

many thanks, working perfectly now

[Voss]

You're welcome!