how to take the first number of the sentence (before the hyphen)

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shamal 2025-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/2175504-how-to-take-the-first-number-of-the-sentence-before-the-hyphen

回答： Walter Roberson 2025-3-22

采纳的回答： Walter Roberson

i've this array string..i want to catch the first number:

2 - MICRO_VARIE_LIVE ====> catch 2

3 - index_Top_Live ====> catch3

ans: [2 3]

rule: the number that comes before the non-number character (hyphen) and it is always found at the beginning of the line

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采纳的回答

Walter Roberson 2025-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/2175504-how-to-take-the-first-number-of-the-sentence-before-the-hyphen#answer_1562232

在 MATLAB Online 中打开

double(extractBefore(VARIABLE, ' -'))

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