Extracting Numbers from a mixed string

Hi!

I would like to know how to extact the numbers from this string,

such that:

a = [ 3.00, 3.1390 , 0.0070, 1160]

b = [ 20.00. 20.1350, 0.012. 1323]

0070 , 1160

"Lung: 3.00 Calibrated: 3.1390 Uncertainty: 0.0070 Asset# 1160 Cal= N/A Due= N/A"

"Lung: 20.00 Calibrated: 20.1350 Uncertainty: 0.0120 Asset# 1323 Cal= N/A Due= N/A"

I cannot get the correct value with b=regexp(str,'\d?\.?\d+','match'), but I am close I think.

It works for a, but not for b

Cheers

HRG

Answer 1

[Kelly Kearney]

Assuming numbers only appear as properly-formatted combos, you can simply look for all number-decimal groups:

b = regexp(str, '[\d\.]+', 'match');

This one is a little more picky, making sure the number-decimal groups form a "proper" number (i.e. wouldn't match something like 1.2.3)

b = regexp(str, '\d+\.{0,1}\d+', 'match');

[Hayden Garmon]

Thanks Kelly!

Answer 2

[jonas]

out=regexp(b,'\d*\.?\d+','match')

Your expression will fail when there are more than 1 digits before the decimal sign, as ? is interpreted as "0 or 1" digit before the (optional) decimal sign