如何将通用 MATLAB 矩阵导出到文本文件，格式类似于 C# 数组

Question

我在 MATLAB 中有一个矩阵，如下所示：

[ 1 2 3 4; 5 6 7 8; 9 10 11 12]

我想将其导出为 C# 格式的文本文件：

double[,] myMat = { {1,2,3,4}, {5,6,7,8}, {9,10,11,12} };

我需要一个 MATLAB 函数，例如称为 exportMatrix()，带有两个参数：

• MATLAB 矩阵
• 必须导出此矩阵的类型

如何使用此功能的两个示例如下：

exportMatrix( myMatrix1, 'short');
exportMatrix( myMatrix2, 'float');

如果矩阵是多维的，我还需要该函数正确导出它。例如，如果：

>> size(A)

ans =

        100        10           3

那么调用exportMatrix( A, 'double');的结果应该是：

double[, ,] A = {...};

Answer 1

这是一个有趣的问题 :) 这是一个起点：

function exportMatrix(A)
% get dimensions 
dimensions  = size(A);
N_dim       = length(dimensions);

% print variable declaration to console
fprintf('double[')
for i = 1:N_dim-1
    fprintf(',')
end
% finish declaration and print rows of matrix
fprintf('] A= {%s}\n', exportRow(A, dimensions))

function str_out = exportRow(B, dims)
% recursively print matrix

% init output string
str_out = '';

% have we finished yet?
if length(dims) > 1
    % if not, then go to next layer
    for i=1:dims(1)
        % this test is just to make sure that we do not reshape a
        % one-dimensional array
        if length(dims) > 2
            % print next slice inside curly-braces
            str_out = sprintf('%s{ %s },', str_out, exportRow(reshape(B(i,:), dims(2:end)), dims(2:end)) );
        elseif length(dims) == 2
            % we are almost at the end, so do not use reshape, but stil
            % print in curly braces
            str_out = sprintf('%s{ %s },', str_out, exportRow(B(i,:), dims(2:end)) );
        end
    end
else
    % we have found one of the final layers, so print numbers
    str_out = sprintf('%f, ', B);
    % strip last space and comma
    str_out = str_out(1:end-2);
end
% strip final comma and return
str_out = sprintf('%s', str_out(1:end-1));

仅适用于二维数组及以上。尝试例如。

exportMatrix(rand(2,2,2))

如果要打印到文件，则需要更改 fprintf 语句...