Extracting number value from string from string using sscanf()

Question

Dimitris M 2012-8-26

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https://ww2.mathworks.cn/matlabcentral/answers/46760-extracting-number-value-from-string-from-string-using-sscanf

采纳的回答： Image Analyst

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Hello

I have a problem trying to extract a number from a string looking like this

Seg_1169_Edgefun_1_5_2_15_90_30_3_1.000000e-001_5_1_1.000000e-001.tif

The number I am interested to extract is the 1169. Sometimes this number can be longer or shorter. The property I can use is that always there are 4 character before it 'Seg_'

I tried to work it out with the sscanf() but I didn't have any success. Do you have any recommendation ?

Thank you in advance

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Answer 1

Image Analyst 2012-8-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/46760-extracting-number-value-from-string-from-string-using-sscanf#answer_57171

编辑：Image Analyst 2012-8-26

在 MATLAB Online 中打开

Just take the string between the first and second underline and pass it in to str2double(). Try this:

s = 'Seg_1169_Edgefun_1_5_2_15_90_30_3_1.000000e-001_5_1_1.000000e-001.tif'
underlineLocations = find(s == '_')
theNumber = str2double(s(underlineLocations(1)+1:underlineLocations(2)-1))