How to find distance on discrete graph
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Hi, here's my code :
close all
clear all
clc
f = [4454,3112,2423,2060,1773,1562,1352,1153,0923,0632,0152];
phase=[-75.7,-59.9,-44,-29.9,-15,0.1,17.3,30.39,45.20,59.68,73.9];
Vr= [0.636,0.989,1.127,1.520,1.661,1.732,1.661,1.449,1.166,0.777,0.183];
Vl=[1.857,1.945,2.001,1.985,1.874,1.686,1.390,1.046,0.663,0.297,0.016];
Vc=[0.177,0.444,0.795,1.111,1.440,1.682,1.865,1.945,1.935,1.854,1.752];
V=1.767766;
VrMax=[0.6928005968,0.6928005968,0.6928005968,0.6928005968,0.6928005968,0.6928005968,0.6928005968,0.6928005968,0.6928005968,0.6928005968,0.6928005968]
plot(f,Vr/V,'r');
hold on;
plot(f,VrMax,'b');
title('BnadPass Calculation');
xlabel('f');
ylabel('Voltage/V');
legend('Vr','VrMax/sqrt(2)');
grid on;
Here's the graph:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/642215/image.png)
How can I find the distance between the cross points of the blue line and the red function? I cannot simply click on this points because I did not plot them and it is an approximation.
Basicly, I want to find out for which f values, the red graph equals 0.6928005968.
Thanks in advance.
댓글 수: 1
Rik
2021년 6월 5일
You could try a linear interpolation of the two points before and after the intersection.
답변 (1개)
Manas Minnoor
2021년 6월 5일
Hey Itzik,
Please refer to the following documentation, it may be what you're looking for.
Hope this helps.
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