Problem with using while

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Abdussalam Elhanashi
Abdussalam Elhanashi el 31 de Oct. de 2019
Respondida: James Heselden el 31 de Oct. de 2019
Hi Guys
have a problem with using while and give me an error when i run matlab for the code attached named Evaluationthedetector
Kindly looking for your assistance
Regards
load('gTruth.mat')
smokedetection = selectLabels(gTruth,'cat');
if ~isfolder(fullfile('EvaluationData'))
mkdir EvaluationData
addpath('EvaluationData');
evaluationData = objectDetectorTrainingData(gTruth,...
'SamplingFactor',10,'WriteLocation','EvaluationData');
end
imds = imageDatastore(fullfile('EvaluationData'));
numImages = height(evaluationData);
result(numImages,:) = struct('Boxes',[],'Scores',[]);
while i = 1:numImages
% Read Image
I = readimage(imds,numImages);
% Detect the object of interest
[bboxes, scores] = detect(detector,I,'MiniBatchSize', 32);
T = 0.54; % Define threshold here
idx = scores >= T;
% if there are 2 or more objects detected, show them
if nnz(idx) >= 2
% Retrieve those scores that surpassed the threshold
s = scores(idx);
% Do the same for the labels as well
bboxes = bboxes(idx, :); % This logic doesn't change
% Store result
result(i).Boxes = bboxes;
result(i).Scores = scores;
end
end
% Convert structure to table
results = struct2table(result);
Error: File: Evaluationthedetector.m Line: 14 Column: 9
Incorrect use of '=' operator. To assign a value to a variable, use '='. To compare values for equality, use
'=='.

Respuesta aceptada

James Heselden
James Heselden el 31 de Oct. de 2019
You are using a while loop where you should be using a for loop.
% Swap out
while i = 1:numImages
...
end
% to
for i = 1:numImages
...
end
Regards
James

Más respuestas (1)

Sulaymon Eshkabilov
Sulaymon Eshkabilov el 31 de Oct. de 2019
while .. end is not used correcly, use for ... end instead
for i = 1:numImages
% Read Image
I = readimage(imds,numImages);
% Detect the object of interest
[bboxes, scores] = detect(detector,I,'MiniBatchSize', 32);
T = 0.54; % Define threshold here
idx = scores >= T;
% if there are 2 or more objects detected, show them
if nnz(idx) >= 2
% Retrieve those scores that surpassed the threshold
s = scores(idx);
% Do the same for the labels as well
bboxes = bboxes(idx, :); % This logic doesn't change
% Store result
result(i).Boxes = bboxes;
result(i).Scores = scores;
end
end
% Convert structure to table

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