How to use regex to obtain double values?
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Struggling in MATLAB
il 29 Lug 2022
Commentato: Struggling in MATLAB
il 29 Lug 2022
I have an array of strings which contains some units. I have attahced the array.
unq = ["10 lux";"10lux";"15";"15.0";"15.5 Lux";"15luX";"15lux";"20lux";"36lux";"42lux";"9lux"]
They are put in different format on different days. So, I get 11 unique entries. I used the following code only to keep the numeric part.
trimData = strtrim(unq);
regexData = regexp(trimData,'\d*','Match');
cleanedData = cell(numel(unq),1);
for kk = 1:numel(unq)
if length(regexData{kk}) >= 1
cleanedData{kk} = regexData{kk}(1);
end
end
cleanedData = str2double(string(cleanedData));
I got
cleanedData = [10;10;15;15;15;15;15;20;36;42;9]
I am not getting 15.5 in the resulting array. How do get the numbers in which the digits after decimal place is not '0'? How do I write a regular expression for that?
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Walter Roberson
il 29 Lug 2022
Modificato: Walter Roberson
il 29 Lug 2022
Extending to the possibility of fraction values that start with decimal point (with no leading zero), and extending to support negative values
But not extending to exponential format:
unq = ["10 lux";"-10lux";"15";"15.0";"15.5 Lux";"15luX";"15lux";"20lux";"36lux";"42lux";".9lux"]
regexData = regexp(unq, '(-?\d+(\.\d*)?)|(-?\.\d+)', 'match', 'once')
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