Looking for alternative of extractBetween function

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SUBHAJIT KAR 2021-11-4

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https://ww2.mathworks.cn/matlabcentral/answers/1578870-looking-for-alternative-of-extractbetween-function

评论： SUBHAJIT KAR 2021-11-9

采纳的回答： Rik

close all

clear all

clc

name = 'Covid_strains';

file = strcat(name,'.fasta');

sequences = fastaread(file);

The code extract the sequences from the fasta file "Covid_strains". The file contains multiple sequences. The fastaread function create a structure containing Header and Sequences. Now I want to extract the some part of the header and store it in a table. The table will be the response variable for the predictor. I wanted to use extractbetween function for this. But since I am using older version of MATLAB, the function is not available to me. Please help.

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Rik 2021-11-4

You didn't enter your release when you posted your question, which makes it harder to help you.

I suspect the best choice would be to use regexp. With a regular expression you can capture the tokens.

SUBHAJIT KAR 2021-11-4

I am using version 2016a. How can I extract 'B.1.2' from the the expression 'OK584715.1 |B.1.2' , using regexp ?

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采纳的回答

Rik 2021-11-4

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在 MATLAB Online 中打开

You need to come up with a regular expression that will exactly match what you want to extract. Below is my guess for what you want.

RE=['\|',... match a literal |
    '(.*)',... capture any character in a token
    '($|\n)'];% end of matched substring should be a newline or the end of the string
txt='OK584715.1 |B.1.2';
x=regexp(txt,RE,'tokens');x{1}
ans = 1×2 cell array
    {'B.1.2'}    {0×0 char}