How to find a y value for a given x in a plot?

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I have plotted a curve with a given dataset. Now I want to find the value of y for a certain value of x. The code and graph is give below.
filen='argo-profiles-2902294.nc'
p=ncread(filen,'PRES');
t=ncread(filen,'TEMP');
p1=p(:,2)
t1=t(:,2)
plot(t1,p1,'k')
set(gca,'YDir','reverse')
Now, let's say I want to find the pressure value for a certain x value (say 25). What to do?

Accepted Answer

Chunru
Chunru on 30 Nov 2021
x1 = 25;
y1 = interp1(t1, p1, x1);
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