matlab中inpaint_nans定义函数代码

以下是一个简单的MATLAB函数，用于填充具有NaN值的数组中的空缺部分。该函数使用线性插值方法来填充NaN值：

function filled_array = inpaint_nans(input_array)
% INPAINT_NANS Interpolate over NaN values in an array.
%   filled_array = INPAINT_NANS(input_array) returns an array with NaN
%   values replaced by interpolated values. The interpolation is done
%   using linear interpolation along columns.
%
%   Example:
%      input_array = [1 2 NaN 4; 5 NaN 7 8; 9 10 11 NaN];
%      filled_array = inpaint_nans(input_array);
%
%   See also: interp1, isnan.

% Get the dimensions of the input array.
[nrows, ncols] = size(input_array);

% Initialize the output array.
filled_array = input_array;

% Loop over the columns of the input array.
for j = 1:ncols
    
    % Find the NaN values in the current column.
    nan_values = isnan(input_array(:,j));
    
    % If there are no NaN values in the current column, skip to the next column.
    if ~any(nan_values)
        continue;
    end
    
    % Find the non-NaN values in the current column.
    non_nan_values = ~nan_values;
    
    % Interpolate over the NaN values in the current column using linear interpolation.
    filled_array(nan_values,j) = interp1(find(non_nan_values), input_array(non_nan_values,j), find(nan_values), 'linear');
    
end

end

这个函数的工作原理是，首先找到数组中的NaN值，然后使用线性插值方法来填充这些NaN值。在这个函数中，我们使用了MATLAB内置函数`interp1`来进行线性插值。