Undefined operator '>' for input arguments of type 'struct'.

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Rabia Sikandar 2020-1-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501638-undefined-operator-for-input-arguments-of-type-struct

回答： Steven Lord 2020-1-23

I have a label code when am running it give me a error "Undefined operator '>' for input arguments of type 'struct'. on this code.Can any one help me to resolve this issue?gBB have the groundtruth value and MSER have the candidate of actual image.

gBB=val;

LabBB=[];

for i=1:length(mserBB(:,1))

Label=0;

for j=1:length(gBB(:,1))

if mserBB(i,1)>gBB(j,1) && mserBB(i,2)> gBB(j,2) && mserBB(i,3)< gBB(j,3) && mserBB(i,4)< gBB(j,4)

Label=1;

end

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Steven Lord 2020-1-23

在 MATLAB Online 中打开

What do the following lines of code display?

whos gBB mserBB
check_gBB = isstruct(gBB)
check_mserBB = isstruct(mserBB)

At least one of check_gBB and check_mserBB will be true.

Rabia Sikandar 2020-1-23

mser have candidate values and gBB have structure value how to compare these two?

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Answer 1

Steven Lord 2020-1-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501638-undefined-operator-for-input-arguments-of-type-struct#answer_411677

在 MATLAB Online 中打开

A struct array can be thought of like a filing cabinet. As an example, one of the drawers (fields) could be titled "taxDocuments", one is "insurance", still another is "utilityBills".

S = struct('taxDocuments', 1:10, 'insurance', magic(5), 'utilityBills', rand(3, 4, 6))

What would it mean to ask if 5 is greater than the filing cabinet? It could make more sense to ask if 5 was greater than part of the contents of one of the drawers in the filing cabinet:

if mserBB(1) > S.insurance(1) % if insurance is an array of numeric data