class 'matlab.io.datastore.PixelLabelDatastore' is not allowed. Error !!!!!

Question

Amira Youssef 2023-3-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1926295-class-matlab-io-datastore-pixellabeldatastore-is-not-allowed-error

评论： Steven Lord 2023-3-10

How can I solve this problem please

Array formation and parentheses-style indexing with objects of

class 'matlab.io.datastore.PixelLabelDatastore' is not allowed.

Use objects of class 'matlab.io.datastore.PixelLabelDatastore'

only as scalars or use a cell array.

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Answer 1

Steven Lord 2023-3-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1926295-class-matlab-io-datastore-pixellabeldatastore-is-not-allowed-error#answer_1190355

在 MATLAB Online 中打开

You can make an array of numeric data in MATLAB.

A = [1 2; 3 4]
A = 2×2
     1     2
     3     4

You cannot make an array of PixelLabelDatastore objects like that. You need to either use one PixelLabelDatastore or you need to make a cell array of PixelLabelDatastore objects. If you choose the latter approach, know that some functions may not accept a cell array of datastores.

If you show us a small sample of your code where this error occurs and explain what you want this code to do we may be able to offer alternate suggestions.

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Amira Youssef 2023-3-10

I was trying to get the hausdorff distance for CT segmented images

I fixed the pixellabeldatastore error but now whenever I run my code matlab crashes now can you help me please. my ground truth are saved as .mat

I_GT_struct=pxdsTruth.Files;

I_Seg_struct=pxdsResults.Files;

for i=0:76

I_GTx =load(I_GT_struct{i,1});

I_GT= I_GTx.cropLabel;

I_Segx= load(I_Seg_struct{i,1});

I_Seg=I_Segx.labelImage;

[~, ~, HD, ~, ~, AVD, ~] = HD_Distance1(I_GT,I_Seg ,[1 1 1],95);

[TPos,FPos,FNeg,DSC] = Segmentation_Errors(I_GT,I_Seg);

HD(i)=HD;

DSC(i)=DSC;

AVD(i)=AVD;

i=i+1;

end

Steven Lord 2023-3-10

So what in this code is a datastore and what isn't?

If you want to perform mathematics on the data from the datastore you're probably going to want to create a tall array from that datastore and perform math on the tall array instead of the datastore.

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