Question

假设我有一个1x4的单元格数组，并且我还有一个while loop，我在其中调用产生与原始数组大小相同的新结果的函数。

如何将新结果附加到现有结果中，以便我仍然拥有1x4数组，并将新结果附加到现有单元格中。

请参阅下面的示例代码：

% image
SegI = [2 2 2 0 0
        2 2 2 0 0
        1 1 2 0 0
        1 1 1 1 0
        1 1 1 1 1];

figure, imshow(SegI, [], 'InitialMagnification','fit')     
grid on; 

% face vectors obtained from each internal node in the image; such that %edge directions of 1|2 are denoted as 'm', and 0|2 as 'n', and others as NaN
% i made the 'b' up just for the purpose of detecting the output easily

allfaces = {NaN,NaN,NaN,NaN; NaN,NaN,NaN,NaN; 'm',NaN,'m',NaN; NaN,NaN,NaN,NaN; NaN,NaN,'n','n'; NaN,'n',NaN,'n'; NaN,'m',NaN,NaN; NaN,NaN,NaN,'m'; NaN,NaN,NaN,NaN; NaN,'m','b',NaN; 'm',NaN,NaN,'n';  NaN,NaN,NaN,NaN; NaN,NaN,NaN,NaN; NaN,NaN,NaN,NaN; NaN,NaN,NaN,NaN; NaN,NaN,NaN,NaN};


% find point vertices... which are nodes that contain pixel edges of both 1|2 and 0|2
Pvertex = find( any(strcmp('m', allfaces),2) & any(strcmp('n', allfaces),2) );


% create storage cell array as well as initialize Pvertex to inodej
myArray = cell(numel(Pvertex), 4);
inodej  = Pvertex;
cp = [3,3];     %coordinates of Pvertex


for k = 1: numel(Pvertex)

    % find next node from Pvertex
     [myArray, allfaces, inodej, ynode, xnode, dist_node] = Obtain_nodes(k, cp, inodej, myArray, allfaces);


    while dist_node < sqrt(2)
        % find nodes until exit loop
       [myArray, allfaces, inodej, ynode, xnode, dist_node] = Obtain_nodes(k, cp, inodej, myArray, allfaces);
    end


end

该功能如下：

function [myArray, allfaces, inodej, ynode, xnode, dist_node] = Obtain_nodes(k, cp, inodej, myArray, allfaces)
% This function computes new nodes from previous ones, as well as
% store each results in the storage cell "myArray" 


if ( find( strcmp('m', allfaces(inodej(k),:)) ) == 1 ) == true 
    % Find the node at the northern end of the face after inodej
    inodej(k,:) =  inodej(k,:) - 1;

    % extract the n, s, e, w faces from allfaces
    a = allfaces(inodej(k),:);

    % store the new results (exclude the existing result at the southern face)
    a(1) = {NaN};
    myArray(k,:) = a;

    % Obtain a new allfaces that deals the South face for the current node  
    allfaces(inodej(k),:) = a;


elseif ( find( strcmp('m', allfaces(inodej(k),:)) ) == 2 ) == true 
    % Find the node at the southern end of the face  after inodej
    inodej(k,:) = inodej(k,:) - 4;

    % extract n, s, e, w faces from allfaces
    a = allfaces(inodej(k),:);

    % store the new results (exclude the node at the northern face)
    a(2) = {NaN};
    myArray(k,:) = a;


    % Obtain a new allfaces that deals the North face for the current node
    allfaces(inodej(k),:) = a;

end


%# compute the distance between inodej and Pvertex
% firstly get the coordinates of the inodej
xnode(k) = mod(inodej(k,:) - 1, 4) + 1;
ynode(k) = (inodej(k,:) - xnode(k))/4 + 1;

% Then find the distance
dist_node(k,:) = sqrt( (cp(1) - ynode(k)).^2 + (cp(2) - xnode(k)).^2 );


end

有关一些解释，请参见下图。

enter image description here

for loop中的第一个函数调用返回：

inodej = 10和myArray = {NaN, 'm', 'b', NaN}

while loop内的函数调用返回：

inodej = 6，它从allfaces的第6行中提取结果，以便： myArray = {NaN, NaN, NaN, 'n'}

但是，我不会在while loop退出后看到我的初始（第一个）结果，因为新的（第二个）结果更新了单元格数组。因此，对我而言，问题是如何在执行while loop时使用之前的内容存储和更新任何新结果。

我希望我的最终输出是这种形式的东西：

[{NaN, NaN}] [{'m', NaN}] [{'b', NaN}] [{NaN, 'n'}]

请注意，我可以增加搜索距离(dist_node)，在这种情况下我不会事先知道（除了目视检查）我可以获得多少新结果。因此，代码必须能够附加尽可能多的新结果。

请，我需要任何帮助/建议/建议才能完成此操作。提前谢谢。

Answer 1

myArray1 = {NaN, 'm', 'b', NaN};
myArray2 = {NaN, NaN, NaN, 'n'};
result = cellfun(@(x,y) {x y}, myArray1, myArray2, 'UniformOutput', false)'

x：myArray1的每个元素

y：myArray2的每个元素

UniformOutput = false确保输出为单元格。

最后的素数将行向量转换为列向量。

this

如何将新数据附加到现有单元阵列中？

1 个答案: