extracting only number from text file

Question

ImageAnalyst 2020-4-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/519442-extracting-only-number-from-text-file

评论： Akira Agata 2020-4-22

采纳的回答： Akira Agata

Hi,

I have a large text file which has data in below format

frame_count: 1, frame_type: p, mv_dst: (8, 8), mv_src: (8, 8), mv_type: f, motion: (0, 0, 4), mb: (16, 16)

frame_count: 1, frame_type: p, mv_dst: (24, 8), mv_src: (24, 8), mv_type: f, motion: (0, 0, 4), mb: (16, 16)

and so on.

I want to extract the value of mv_dst,mv_src and first two numbers of value motion and store in a matrix in below format

frame_count: 1, frame_type: p, mv_dst: (8, 8), mv_src: (8, 8), mv_type: f, motion: (0, 0, 4), mb: (16, 16)

Matrix should have value like this

first matrix with value from mv_dst(8,8) and first value from motion motion: (0, 0, 4) [ 0 in this case]

x_vec y_vec motion

8 8 0

second matrix with value from mv_src(8,8) and second value from motion :motion: (0, 0, 4) [ 0 in this case]

x_vec y_vec motion

8 8 0

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Answer 1

Akira Agata 2020-4-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/519442-extracting-only-number-from-text-file#answer_427237

在 MATLAB Online 中打开

data.txt

How about the following?

% Read the original text file
c = readcell('data.txt','Delimiter','\n');
% Extract coordinates from each line
cData = regexp(c,'\d+,\s+\d+(,\s+\d+)*','match');
cData = vertcat(cData{:});
% Arrange the numbers
mv_dst = str2double(split(cData(:,1),','));
mv_src = str2double(split(cData(:,2),','));
motion = str2double(split(cData(:,3),','));
% 1st and 2nd matrix
T1 = array2table([mv_dst,motion(:,1)],'VariableNames',{'x_vec','y_vec','motion'});
T2 = array2table([mv_src,motion(:,2)],'VariableNames',{'x_vec','y_vec','motion'});

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ImageAnalyst 2020-4-21

mvs01.zip

I tested myself with this text.txt and the above code works fine its only when using the whole file that i get the error.I have attched the file. Could you please take a look