Maximum and Minimum Intrinsics

max( a1, a2, a3, ...)         min( a1, a2, a3, ...)

return the maximum (minimum) value over a list of arguments.

The arguments can be (conformal) arrays; the result of MAX (MIN) is then an array of the same shape and size as the arguments, containing element by element maxima (minima).

The maximum value among the elements of an array A can be obtained with

maxval(A)

The location of the first element which has this maximum value is given by

maxloc(A)

If the rank of the matrix A is , the returned result is an -dimensional array, containing the values of the subscripts (i.e. the location) of the maximum value element.

We can take the maximum values along a specified dimension, using

maxval(A, DIM=d)

When we use the DIM argument, the result of MAXVAL is a rank r-1 array, with the maximum values in other dimensions.

For example, if A is a 2-dimensional matrix, using d=1 computes the maxima in each column, and d=2 computes the maxima in each row. The results are rank 1 arrays (vectors).

Finally, we can use the masked form of MAXVAL, for example

maxval(A, MASK=A<4)

The survey is only performed on elements of A which correspond to .TRUE. elements of the mask; here the maximum is taken over the elements of A which are less than 4.

Note that DIM and MASK arguments can be used simultaneously.

The functions

return the position of the minimal element in an array, and the minimal value respectively; their use is similar to the use of MAXLOC, MAXVAL.