How can extract specific numbers from a string???

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Thimiod Athan 2016-9-9

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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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Answer 1

Guillaume 2016-9-9

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在 MATLAB Online 中打开

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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Thimiod Athan 2016-9-9

Thank you!!!!

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Answer 2

Image Analyst 2016-9-9

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Have you tried sscanf() or str2double()?

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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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