How to get the last two digits of a number?
70 views (last 30 days)
Show older comments
Maximilian Lingel
on 10 May 2021
Commented: Image Analyst
on 22 Jan 2022
Hello,
I have a table with 505 rows and 1 column. Each row contains a 4 digit number and from of these numbers I would like to extract the last two digits to add a second column to that table containing the last two digits of every number in the first column.
I would be grateful for any hints. Thank you
0 Comments
Accepted Answer
David Fletcher
on 10 May 2021
x=4974
y=floor((x/100-floor(x/100))*100)
3 Comments
Felician Putz
on 22 Jan 2022
Be careful with floor. This can give the wrong result for some numbers. Counter example: 1001, whose result is 0 for me because apparently floor(1.0000) is 0 for Matlab.
Image Analyst
on 22 Jan 2022
floor(1.0000)
x = 1001;
v = floor((x/100-floor(x/100))*100)
fprintf('%.32f', (x/100-floor(x/100))*100) % This is not 1
More Answers (1)
DGM
on 10 May 2021
Assuming they're integers:
% 10 rows random integers
n = (randi(8999,1,10)+1000)'
n = [n mod(n,100)]
If they aren't integers, you should decide how you want to round them first.
3 Comments
Adam Danz
on 10 May 2021
Either of the two existing solutions will work with 4-digit integers but note that if the 3rd digit is a 0 as in 4206, the extraction will be 6 and not 06 since matlab does not preserve the 0 place holder. If you want to retain the 0, you'll need to extract the digis as strings or character vectors.
Method 1: convert to string after extraction
rng(123) % for reprodicibility
x = round(rand(10,1)*10000);
lastTwo = mod(x,100);
charVec = compose('%02d',lastTwo); % for char-vectors
str = string(compose('%02d',mod(x,100))); % for string array
T = table(x, lastTwo, charVec, str)
Method 2: convert to string and then extract
rng(123) % for reprodicibility
x = round(rand(10,1)*10000);
xstr = string(x);
str = extractAfter(xstr,2);
T = table(x, lastTwo, str)
See Also
Categories
Find more on Whos in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!