Extracting number value from string from string using sscanf()

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

Answer 1

[Image Analyst]

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))

[Dimitris M]

Perfect ! Thank you !

[Jan]

strfind(s, '_') is faster than find(s == '_').

Answer 2

[Jan]

The sscanf-method looks easy:

n = sscanf(s, 'Seg_%d');