Choose specific values from dataset

2022 5 4
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I have the following dataset consisting of two columns, interrupted by random integers. How can I read the dataset (attached below) and keep only the first set of values (colored red in the picture) after each integer?

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Stephen23
Stephen23 2022-5-4
编辑：Stephen23 2022-5-4
Ran in:

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Ran in:
txt = fileread('demodata1.txt');
rgx = '^\s+\d+\s+(\S+)\s+(\S+)';
tkn = regexp(txt,rgx,'tokens','lineanchors');
mat = str2double(vertcat(tkn{:}))
mat = 4×2
0.3164 -0.3921 -0.1385 0.4998 0.4545 -0.2000 -0.1175 -0.1774

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