Extracting data points (with specific coordinates) from plot

Hi,

I have plotted a large number of data. Now from this plot, I want to extract data points that their Y coordinate is either 40 or very close to 40 (say closer than 0.01).

Anyone know how I can do that?

Answer 1

[Matt J]

For example,

Y=40+0.04*linspace(-1,1,10)

Y = 1×10

39.9600 39.9689 39.9778 39.9867 39.9956 40.0044 40.0133 40.0222 40.0311 40.0400

data=10*(1:numel(Y))

data = 1×10

10 20 30 40 50 60 70 80 90 100

data_Extracted = data(abs(Y-40)<=0.01)

data_Extracted = 1×2

50 60