Double X-axis(t,p1) and single Y-axis(p2) depending on t

Hello,

I am trying to find the behaviour of P2 according to the changes of P1 from the table.

b=readtable('b1.xlsx');

So I plot like this

figure
p1=b.P1;
p2=b.P2;
plot(p1,p2)

It didn't turn out well

figure
yyaxis left
y2 = p2;
y = p1;
x = duration(b.Time);
plot(x,y2)
yyaxis right
plot(x,y)

Here, the data is controlled by the time and it turned out okay but I want the P1 on the x-axis to get the relationship with P2. So I thought about plotting according to my sketch. I want the p1 and time both in the x axis.

I want to draw the line for p1 vs p2 according to the time. Can someone help me with this problem?

Answer 1

[KSSV]

T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1309930/b1.xlsx') ;
t = duration(T.Time);
p1 = T.P1 ;
p2 = T.P2 ;
plot(t,p1,'r',t,p2,'b')

plotregression(p1,p2)

[Walter Roberson]

T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1309930/b1.xlsx') ;
[h,m,s] = hms(duration(T.Time));
p1 = T.P1 ;
p2 = T.P2 ;
plot3(s,p1,p2)
xlabel('time (s)'); ylabel('p1'); zlabel('p3')