round

Syntax

round(X, [percision])

Arguments

X is a scalar/vector/matrix.

percision is an integer indicating the number of digits after the decimal point. The default value is 0.

Details

round a number to the specified number of digits after the decimal point with the round half up rule.

In comparison, functions floor and ceil map a number to the largest previous or the smallest following integer, respectively.

Examples

$ round 2.1;
2

$ round 2.9;
3

$ round -2.1;
-2

$ round(2.154,2);
2.15

$ round(2.156,2);
2.16

$ ceil 2.1;
3

$ ceil 2.9;
3

$ ceil -2.1;
-2

$ floor 2.1;
2

$ floor 2.9;
2

$ floor -2.1;
-3

$ m = 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 10$2:5;
$ m;

#0

#1

#2

#3

#4

1.1

3.3

5.5

7.7

9.9

2.2

4.4

6.6

8.8

10

$ round m;

#0

#1

#2

#3

#4

1

3

6

8

10

2

4

7

9

10