Error "Undefined function or variable"

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0 个投票

I am receiving one of the following error messages. How can I resolve this issue?

Undefined function or variable 'segment_list'.

Code:

labels = {'cheduepalle';'fame';'chevuoi';'basta'};
segment_counter = 1;
for data_counter=1:num_of_samples
    currVideo = data_files(data_counter).Video;
    for label_counter = 1: length(currVideo.Labels)
        if ismember(currVideo.Labels(label_counter).Name, labels)
            s = struct('videoID', data_counter, 'start',currVideo.Labels(label_counter).Begin, 'end', currVideo.Labels(label_counter).End, 'label', currVideo.Labels(label_counter).Name);
            segment_list(segment_counter) = s;
            segment_counter = segment_counter + 1;
        end
    end
end

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PaunBGD 2021-9-18

在 MATLAB Online 中打开

Undefined function or variable 'segment_list'.

Error in main (line 287)

for idx = 1:length(segment_list)

Here is the code, starting from line 287:

for idx = 1:length(segment_list)
    curr_face = [];
    curr_lhand = [];
    curr_rhand = [];
    for Frameidx = segment_list(idx).start:segment_list(idx).end
        curr_face = [curr_face; data_files(segment_list(idx).videoID).Video.Frames(Frameidx).Skeleton.PixelPosition(4,:)];
        curr_lhand = [curr_lhand; data_files(segment_list(idx).videoID).Video.Frames(Frameidx).Skeleton.PixelPosition(8,:)];
        curr_rhand = [curr_rhand; data_files(segment_list(idx).videoID).Video.Frames(Frameidx).Skeleton.PixelPosition(12,:)];
    end
    segment_list(idx).FaceArray = curr_face;
    segment_list(idx).lHandArray = curr_lhand;
    segment_list(idx).rHandArray = curr_rhand;
end

Cris LaPierre 2021-9-18

It looks like segment_list never gets created. This could be because your for loops never end up running, or because your if conditional is never true. See Walter's reply below for more details.

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