2D Interpolation with different sized matrices

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Senal Perera
Senal Perera 2021-1-18
评论： Senal Perera 2021-1-20
x = [1 2 3 4 5];
y = [1 2 3 4 5];
z = [1 2 1 2 3; 3 4 3 4 5; 5 6 5 6 7; 3 4 3 4 5; 1 2 1 2 3];
]
Hello,
Is there a method to obtain the corresponding x value when the y and z values are provided? I tried interp2 which gives the value of z when x and y are given. The command does not offer me the expected option. Can somebody guide me to solve my problem?
Thanks in advance.

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回答（1 个）

Jan
Jan 2021-1-18
A bold guess of what "corresponding x value when the y and z values are provided" means:
x = [1 2 3 4 5];
y = [1 2 3 4 5];
z = [1 2 1 2 3; 3 4 3 4 5; 5 6 5 6 7; 3 4 3 4 5; 1 2 1 2 3];
yWant = 2;
zWant = 3;
match = (y == yWant) & (z == zWant); % Auto-expand, Matlab >= R2016b
xResult = x(any(match, 1));
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Jan
Jan 2021-1-19
My code does only find exact matchs, so it is not an interpolation. Therefore I asked for examples of inputs and the wanted outputs. Please answer this question for clarification, because it is required to understand, what you want to get. I cannot guess, what you want as output for the inputs y=2.5 and z=4.5 .
Senal Perera
Senal Perera 2021-1-20
sorry for the inconvenience. I need to get the value of x as the output. The two inputs will be y=2.5 and z=4.5

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