Problem with plotting graph

Question

Adrian Kleffler 2023-5-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1960229-problem-with-plotting-graph

移动：Walter Roberson 2023-5-10

Hello, I trained Fast R-cnn detector and after I visualize graph of average precision for every class, each graph looks the same but the value of average precision is diferent for every class...

here is the code:

[ap, recall, precision] = evaluateDetectionPrecision(detectionResults,testData);

here i am showing average precision for first class:

recallv = cell2mat(recall);
precisionv = cell2mat(precision);
[r,index] = sort(recallv);
p = precisionv(index);
figure
plot(r,p)
xlabel("Recall")
ylabel("Precision")
grid on
title(sprintf("Average Precision = %.2f",ap(1)))

and the graphs looks the same for every class:

and also average precision for 4th class is 0... I dont know why... can anybody help me? why is the average precision for 4th class 0?

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Walter Roberson 2023-5-9

在 MATLAB Online 中打开

for i = 1 : length(ap)
    recallv = recall{i};
    precisionv = precision{i};
    stuff goes here
    title(sprintf("Average Precision = %.2f",ap(i)));
end

Adrian Kleffler 2023-5-9

Can you insert it in my code please? I’m not sure if i understand you

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Answer 1

Walter Roberson 2023-5-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1960229-problem-with-plotting-graph#answer_1232114

移动：Walter Roberson 2023-5-10

在 MATLAB Online 中打开

for i = 1 : length(ap)
    recallv = recall{i};
    precisionv = precision{i};
    [r,index] = sort(recallv);
    p = precisionv(index);
    figure
    plot(r,p)
    xlabel("Recall")
    ylabel("Precision")
    grid on
    title(sprintf("Average Precision = %.2f",ap(i)));
end