enter a string of characters and numbers, add and return the sum of the numbers in matlab, for example: 'there are two blue birds and 4 red birds on the branch'--> return 6

please help me solve this problem: enter a string of characters and numbers, add and return the sum of the numbers in matlab, for example: 'there are two blue birds and 4 red birds on the branch'--> return 6

[Walter Roberson]

Which names of numbers need to be handled? For example does it need to be able to handle,

there are seventeen thousand million three hundred and sixty two thousand five hundred and nine red birds

[Phung Khai]

I'm sorry to have entered the wrong topic, the correct topic is: " 2 blue birds and 4 red birds " --> output = 6. need to handle numeric types, like the above example :2 and 4

Answer 1

[Konrad]

Hi

if you only need to handle numeric type, I'd recommend regular expressions:

strng = ' 2 blue birds and 4 red birds';
res_str = regexp(strng,'\d+(\.\d+)?','match');
res_num = str2double(res_str);
res_sum = sum(res_num);

If you also want to handle written numbers as in your initial example

'there are two blue birds and 4 red birds on the branch'

this FEX might by of great help.

Best, Konrad

[Konrad]

Note that you have to adapt the regular expression if you also want to handle other number formats, e.g. scientific notation (31416e-4) or another decimal separator.

[Phung Khai]

tks, very much !! bro <3

[Walter Roberson]

The regexp needs a bit of adjustment if you want to handle numbers with leading period such as .75