How to get value of X based on a specific value of Y in Graph

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ayinas 2020-10-27

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https://ww2.mathworks.cn/matlabcentral/answers/627413-how-to-get-value-of-x-based-on-a-specific-value-of-y-in-graph

评论： ayinas 2020-10-27

采纳的回答： Walter Roberson

How to get value of X based on a specific value of Y in Graph

for example

x = [ 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 ];

y= [ -77.4236 -91.4051 -105.387 -119.368 -133.35 -147.331 -161.313 -175.294 -189.276 -203.258 ]

and i have to find at what value of x i m getting y value of 100 or any negative value of Y.

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采纳的回答

Walter Roberson 2020-10-27

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在 MATLAB Online 中打开

x100 = interp1(y, x, 100, 'linear', 'extrap')

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Walter Roberson 2020-10-27

The left hand side should be a variable name that does not have to include the number. For example you could assign to xinterp or to x_at_negative_100

ayinas 2020-10-27

Thanks alot sir.

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