Extracting number value from string from string using sscanf()

2012 8 26
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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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Image Analyst
Image Analyst 2012-8-26
编辑：Image Analyst 2012-8-26

0 个投票

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))

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