Rounding Off Number(s) to Specified Significant Figures

Round off number(s) to specified significant figures, using two simple/powerful MATLAB functions.

spa_sf Rounding Off Number(s) to Certain Significant Figures

N = spa_sf(X,SF) is the rounded off number(s) of X with the specified significant figures SF. X could be a scalar or a vector; however, SF must be a scalar.

Example 1)
X = 3.14159265359;
SF = 3;
N = spa_sf(X,SF)

> N = 3.1400

Example 2)
X = 3.14159265359; X=[X,X*2;X*3,X*4];
SF = 3;
N = spa_sf(X,SF)

> N =
3.1400 6.2800
9.4200 12.6000

See also: num2str, str2num

* I hope it would be of any help.