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Find all intercepts for all parameter values

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University
University 2023-10-11
评论： Matt J 2023-10-13
Hi,
In the attached the fig. I have different intercept for different values of xi. I plotted the figure from COMSOL. Please how can I find all the intercepts in matlab and plot them against xi ?
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Torsten
Torsten 2023-10-11
And what intercepts are you talking about ? Intercepts with the axis "velocity = 0" ? Intercepts of the curves themselves ?
University
University 2023-10-11
While, at the monent this is velocity component in the y-direction verse the xi plot. I actually want to plot the y_intercept (which is the position) verse the xi. In which case, i need to compute y_intercept.

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Matt J
Matt J 2023-10-11
编辑：Matt J 2023-10-11
Ran in:
As an example,
y=linspace(-1,1,1000);
V=sin(pi*y-0.4); %fake input data
loc=diff(sign(V)) & abs(y(1:end-1))<0.5;
yintercept=y(loc),
yintercept = 0.1271
plot(y,V,yintercept,0,'rx'); yline(0);
xlabel y-coordinate; ylabel Velocity
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University
University 2023-10-12
Hi Matt,
Thank you for your assistant. I will try this
Matt J
Matt J 2023-10-13
You're welcome, but if it works please Accept-click the answer.

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