amin

Purpose

Moves across one dimension of an N-dimensional array and finds the smallest element.

Format

y = amin(x, dim)
Parameters:
  • x (array) – N-dimensional array
  • dim (scalar) – the dimension across which to find the minimum value.
Returns:

y (N-dimensional array) –

Examples

/*
** Setting the rng seed allows for repeatable
** random numbers
*/
rndseed 8237348;

/*
** Create a 24x1 vector of random normal numbers
** with a standard deviation of 10 and then round
** to the nearest integer value
*/
x = round(10*rndn(24, 1));

/*
** Reshape the 24x1 vector into a 2x3x4 dimensional array
** NOTE: The pipe operator '|' is for vertical concatenation
*/
x = areshape(x, 2|3|4);

dim = 2;
y = amin(x, dim);

x is a 2x3x4 array, such that: [1,1,1] through [1,3,4] =

 1.0000000      -11.000000       9.0000000      -8.0000000
-2.0000000      -10.000000      -6.0000000      -5.0000000
-5.0000000       17.000000       9.0000000      -2.0000000

[2,1,1] through [2,3,4] =

-4.0000000      -2.0000000       7.0000000      -2.0000000
 4.0000000       13.000000      -16.000000       11.000000
 2.0000000      -1.0000000       12.000000      -16.000000

y will be a 2x1x4 array, such that: [1,1,1] through [1,1,4] =

-5.0000000      -11.000000      -6.0000000      -8.0000000

[2,1,1] through [2,1,4] =

-4.0000000      -2.0000000      -16.000000      -16.000000
y = amin(x, 1);

Using the same array x as the above example, this example finds the minimum value across the first dimension. y will be a 2x3x1 array, such that: [1,1,1] through [1,3,1] =

-11.000000
-10.000000
-5.0000000

[2,1,1] through [2,3,1] =

-4.0000000
-16.000000
-16.000000

Remarks

The output y, will have the same sizes of dimensions as x, except that the dimension indicated by dim will be collapsed to 1.

See also

Functions amax(), minc()