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how to find values of y for a given x when both are arrays?

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Hola Hola.. was wondering how to make it so, that I can know exactly the value of y for a given x when x and y are arrays. I've seen many options online but I just get an empty []. Please help. I have the graph below and want to extract the y values of all three lines (I've given only info on one of the three)along different x values, for example x=0.5, x=0.55, x=0.6, x=0.65. and y are
y=wdth_8mm;(see attached file);


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Accepted Answer

KSSV on 21 Oct 2020
Edited: KSSV on 21 Oct 2020
Let (x,y) be data you have. And you want to find yi for given xi. For this you have to do interpolation. Read about interp1.
yi = interp1(x,y,xi)

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