Question

我有一个方阵。我需要分析每个对角线并检查每个对角线中是否至少有n =阈值相邻元素大于0。如果相邻正元素的数量小于阈值，那么我必须将这些元素设置为0.

我刚刚写了两个函数。其中一个提取后续对角线，计算正元素并将对角线中的适当元素设置为0.第二个插入对角线改变为矩阵。

我已多次尝试更正此代码，但我仍遇到同样的问题。有人能帮助我吗？谢谢你的进步。

function [ filteredMatrix ] = filterMatrix2( matrix, threshold )

sum = 0; %counts adjacent numbers that are > 0
matrixDimension = length(matrix);
filteredMatrix = matrix;

%a diagonal number is in range [ -dimension+1 ; dimension-1 ]
for k = (-matrixDimension+1) : (matrixDimension-1)
    diagonal = diag(matrix, k); %get next diagonal
    diagonalLength = length(diagonal); 
    sum=0;

    %if a diagonal length is shorter than threshold, 
    %than i must set all elements to 0
    if ( diagonalLength < threshold )
        diagonal = zeros(diagonalLength, 1);
    else
        for x = 1 : diagonalLength
            if diagonal(x) > 0
                sum = sum+1;
            else
               if ( sum < threshold )
                   %set previous elements to 0
                    for y = x-sum : x      
                        diagonal(y) = 0;
                    end
                    sum = 0;
               end
            end
        end
    end
    filteredMatrix = setDiagonal2(filteredMatrix, k, diagonal); (line 33)
end

end

第二功能：

function [ changedMatrix ] = setDiagonal2( matrix, numberOfDiagonal, diagonal )

  changedMatrix = matrix;
  diagonalLength = length(diagonal);

  numberOfRows = size(matrix,1);
  %numberOfColumns = size(matrix,2);

  %determin index of the first element of the diagonal
  if numberOfDiagonal < 0
    firstIndex = 1 - numberOfDiagonal;
  else
    firstIndex = 1 + numberOfDiagonal*numberOfRows;
  end 

 changedMatrix(firstIndex : numberOfRows+1 : diagonalLength) = diagonal; 
  (line 15)

 end

这是一个问题：

在作业A（:) = B中，A和B中的元素数必须相同。

setDiagonal2（第15行）错误

changedMatrix（firstIndex：numberOfRows + 1：diagonalLength）=对角线;

filterMatrix2中的错误（第33行）

filteredMatrix = setDiagonal2（filteredMatrix，k，diagonal）;

在Matlab中过滤矩阵

0 个答案: