# How to get back real value after rounding

2 views (last 30 days)
Med Future on 16 Dec 2022
Answered: Steven Lord on 16 Dec 2022
Hello, I have the value 3.3 and 0.5, when I apply my algorithim i round the value to 3.3 to 3 and 0.5 to 1.
I want to get back the real value 3.3 and 0.5 after rounding. How can i do that in MATALAB.

Steven Lord on 16 Dec 2022
Unless you've stored those un-rounded values in a variable that still exists, you can't.
Suppose I tell you I bought two items A and B from the store, and that their prices (rounded to the nearest dollar) are each \$3. Is item A or item B more expensive? With just the information I gave you that question is impossible to answer. You'd need something else, like a peek at my receipt (which would have the original prices, and in this case would correspond to having a backup copy of the original data in a separate variable) to answer that question.

Arif Hoq on 16 Dec 2022
a=[3.3 0.5];
round_vector=round(a)
round_vector = 1×2
3 1
c=a-round_vector;
origin_vector=round_vector+c
origin_vector = 1×2
3.3000 0.5000

### Categories

Find more on Matrix Indexing in Help Center and File Exchange

R2022a

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!