Legend in plot using forloop

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Sam
Sam on 27 Mar 2020
Answered: Peng Li on 27 Mar 2020
Hello,
I am trying to plot the legend of 3 things here: temperature data (continuous blue line), the starting point of a sit period (green asterix), end point of a sit period (red asterix). The forloop runs over 2 specified values (4 and 34).
[row2,col2] = find(start_sit_periods);
for i = col2;
t = linspace(0,(((length(temp_i1)/fs)/60)/60),length(temp_i1));
figure(1)
ee = linspace(0,((length(x_i1)/fs)/60),length(x_i1));
subplot 411
plot(ee,temp_i1)
xlabel('Time (minutes)')
ylabel('Temperature (°C)')
hold on
plot(ee(start_sit_periods(1,i)),temp_i1(start_sit_periods(1,i)),'*g')
plot(ee(end_sit_periods(1,i)),temp_i1(end_sit_periods(1,i)),'*r')
legend('Leg temperature','Start sit','End sit')
subplot 412
plot(ee,abs(x_i1))
xlabel('Time (minutes)')
ylabel('Acceleration (m/s²)')
subplot 413
plot(ee,abs(y_i1))
xlabel('Time (minutes)')
ylabel('Acceleration (m/s²)')
subplot 414
plot(ee,abs(z_i1))
xlabel('Time (minutes)')
ylabel('Acceleration (m/s²)')
end
I've tried some things, but the legend stays wrongs.
Can anyone help?
Thanks!
  1 Comment
darova
darova on 27 Mar 2020
Did you try put several legend after each subplot?

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Accepted Answer

Peng Li
Peng Li on 27 Mar 2020
Not quite sure what you meant by "the legend stays wrong", but please try this if my guess is correct.
figure(1)
ee = linspace(0,((length(x_i1)/fs)/60),length(x_i1));
subplot 411
p1 = plot(ee,temp_i1)
xlabel('Time (minutes)')
ylabel('Temperature (°C)')
hold on
p2 = plot(ee(start_sit_periods(1,i)),temp_i1(start_sit_periods(1,i)),'*g')
p3 = plot(ee(end_sit_periods(1,i)),temp_i1(end_sit_periods(1,i)),'*r')
legend([p1 p2 p3], {'Leg temperature','Start sit','End sit'})

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