Interpolate 2D array at certain point

Antonis Gikas

2019 10 31

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I have a 8x32 table with values of interest that correspont to points defined by the first row and the first column.

The values of the table at the first column are inside [1,20] and the values of the first row are inside [0.0012,5]

Here's what I need to do:

For a certain point, let's say (1.005 , 5.5) , I want my script to load the matrix, interpolate it's values and return the corresponding value to the given point.

During my tries I kept on receiving the error:

Error using .' (line 191)

Undefined function 'transpose' for input arguments of type 'table'.

Error in interp2 (line 122)

V = V.';

The code I've tried was:

load('bw20')
interp2(bw20(1,2:32),bw20(2:8,1),bw20,1.005,5.5);

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Adam 2019-10-31

在 MATLAB Online 中打开

What is bw20?

If it is a table you likely need to call its values as

bw20{1,2:32}

rather than use parenthesis which, I think, returns a sub-table rather than a numeric array. Table inputs are not supported by interp2. I'm surprised it gets as far as it does into the function before complaining about that.