How to mark range of Y values in a plot?

Hello!

I'm trying to generate a plot and place green X symbols over a specific range of places on the Y-Axis. I generated my variables with this code, and plotted them like so:

AStudent=randi(50,1,100);
BStudent=randi(50,1,100);
CStudent=randi(50,1,100);
DStudent=randi(50,1,100);


figure
hold on
plot(AStudent,'b.')
plot(BStudent,'b.')
plot(CStudent,'b.')
plot(DStudent,'b.')

Now I need to try and plot a green X over the existing data on the Y axis between and 25-35. I attempted do do so with the following but this obviously only helps me find the X values. Any idea what I need to do? I'm guessing I have to utalize the "find" function somehow.

hold on
plot([25:35],AStudent(25:35),'gx')
plot([25:35],BStudent(25:35),'gx')
plot([25:35],CStudent(25:35),'gx')
plot([25:35],DStudent(25:35),'gx')

Thank you!

Answer 1

[KSSV]

AStudent=randi(50,1,100);
BStudent=randi(50,1,100);
CStudent=randi(50,1,100);
DStudent=randi(50,1,100);
figure
hold on
plot(AStudent,'b.')
plot(BStudent,'b.')
plot(CStudent,'b.')
plot(DStudent,'b.')
hold on

Aidx = AStudent>=25 & AStudent <=35 ;
Bidx = BStudent>=25 & BStudent <=35 ;
Cidx = CStudent>=25 & CStudent <=35 ;
Didx = DStudent>=25 & DStudent <=35 ;


plot(find(Aidx),AStudent(Aidx),'gx')
plot(find(Bidx),BStudent(Bidx),'gx')
plot(find(Cidx),CStudent(Cidx),'gx')
plot(find(Didx),DStudent(Didx),'gx')

[ArcTech]

Thanks! This does exactly what I was looking for.

Answer 2

[Sulaymon Eshkabilov]

Here is one of the viable ways how you can achieve your goal of simulation:

clearvars; close all
k=100;                     % In case, you need to change the size of your data
AStudent=randi(50,1,k);
BStudent=randi(50,1,k);
CStudent=randi(50,1,k);
DStudent=randi(50,1,k);
%%
figure
N=1:k;
plot(N,AStudent,'ro'), hold on
plot(N,BStudent,'ro')
plot(N,CStudent,'ro')
plot(N,DStudent,'ro')
Idx1 = (AStudent>=25 & AStudent<=35);
Idx2 = (BStudent>=25 & BStudent<=35);
Idx3 = (CStudent>=25 & CStudent<=35);
Idx4 = (DStudent>=25 & DStudent<=35);

hold on
plot(N(Idx1),AStudent(Idx1),'gx')
plot(N(Idx2),BStudent(Idx2),'gx')
plot(N(Idx3),CStudent(Idx3),'gx')
plot(N(Idx4),DStudent(Idx4),'gx')
hold off

[ArcTech]

Thank you!