plot two axis in same window in MATLAB

[nishat anjum khan]

hey everyone..can anyone help me in MATLAB simulation? for my project i have to receive data in MATLAB via serial communication and then have to plot it...i have to take two adc value so need to plot them in same window...since one of it is voltage and another is current so i need two axis in same window...help me please



my code:

clc;
clear all;
close all;
i=1;
count=50;
%val=55.2/8.2;
val=16/1;
data1=NaN(1,count);
data2=NaN(1,count);
s1=serial('COM1','Baudrate',57600);
fopen(s1);
hsLine= plot(data1);
hold on
hcLine= plot(data2);
while(1)

z1=fgets(s1);
z1=str2double(z1);
z1=z1*5/1024;


z2=fgets(s1);
z2=str2double(z2);
z2=z2*5/1024;


if (i<(count+1))

data1(i)=z1;
data2(i)=z2;


else
data1(1,1:count-1)=data1(1,2:count);
data1(count)=z1;

data2(1,1:count-1)=data2(1,2:count);
data2(count)=z2;

end
set(hsLine,'YData',data1);

set(hcLine,'YData',data2);
ylim([0 5]);

drawnow

i=i+1;

end
fclose(s1);
delete(instrfind({'Port'},{'COM1'}))

 

[thylacine1975]

Check out "plotyy()"...

It's not as convenient/friendly to use as the regular plot function, but it might help. Alternatively, use subplot() to divide your figure window into multiple (independent) axes.

 

[nishat anjum khan]

i am trying to use plotyy() but this isn't working properly...where i am doing wrong i don't know..can u give me any suggestion how to write it in my code?

 

[Asiya]

i am trying to use plotyy() but this isn't working properly...where i am doing wrong i don't know..can u give me any suggestion how to write it in my code?

Why don't you write figure before the loop and hold it:

Figure;

//loop start
subplot(1,2,1); plot(x); hold on
subplot(1,2,2); plot; hold on
//loop end

It is much easier, I tried it before and it is working.