prec

The prec function rounds a number or range of numbers to the specified number of significant digits, or places of significance. Values are rounded to the nearest integer; values of exactly 0.5 are rounded up.

Syntax

prec(numbers,digits)

The numbers argument can be a scalar or range of numbers. Any missing value or text string contained within a range is ignored and returned as the string or missing value.

If the digits argument is a scalar, all numbers in the range have the same number of places of significance.

If the digits argument is a range, the number of places of significance vary according to the corresponding range values. If the size of the digits range is smaller than the numbers range, the function returns missing values for all numbers with no corresponding digits.

Example

For x = {13570,3.141,.0155,999,1.92}, the operation prec(x,2) returns {14000,3.100,.0160,1000,1.90}.

For y = {123.5,123.5,123.5,123.5}, the operation prec(y,{1,2,3,4}) returns {100.0, 120.0,124.0,123.5}.

関連情報

• int
• round