How can extract specific numbers from a string???

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Thimiod Athan
Thimiod Athan 2016-9-9
评论： Thimiod Athan 2016-9-9
I have the string c={ 4 of 5 stars, 5 of 5 stars, 5 of 5 stars, 3 of 5 stars, 3 of 5 stars, 4 of 5 stars}. How can extract to a matrix the bold numbers ????
thank you!!!

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采纳的回答

Guillaume
Guillaume 2016-9-9
You could use a regular expression. Assuming all the numbers you want to extract are integer:
str = 'c={ 4 of 5 stars, 5 of 5 stars, 5 of 5 stars, 3 of 5 stars, 3 of 5 stars, 4 of 5 stars}';
starcount = str2double(regexp(str, '\d+(?= of)', 'match'))
The regular expression matches any sequence of digit immediately followed by ' of'.

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Image Analyst
Image Analyst 2016-9-9
Have you tried sscanf() or str2double()?
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Thimiod Athan
Thimiod Athan 2016-9-9
编辑：Thimiod Athan 2016-9-9
Yes but I want to extract only the bold number not all the numbers. one idea is Value = sscanf(a(1), '%g', 1) Value1 = sscanf(a(14), '%g', 1) Value2 = sscanf(a(27), '%g', 1)....etc

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