Need to find the value of x_?, where x_? is x at y=?......

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Ara
Ara 2013-4-29
评论： reetu bharti 2020-11-16
Dear All,
Just a simple question, I need to find x_15, where x_15 is x at y=15. Please imagine x and y as below,
x y
0.1 20
0.05 15
0.2 85
Thank you!

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Iman Ansari
Iman Ansari 2013-4-29
Hi.
x=[0.1; 0.05; 0.2];
y=[20; 15; 85];
x(y==15)
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Ara
Ara 2013-4-29
Thank you, yes this works. Ok, now by using "nnz" I realize at that value the vector was zero which is not reasonable based on my observation then I will go to recheck that part. So no wonder then why Matlab shows no figure.
reetu bharti
reetu bharti 2020-11-16
where we can use x_ exactly?
is it known as space variable?

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