indexcat#

Purpose#

Returns the indices of the elements of a vector which fall into a specified category

Format#

y = indexcat(x, v)#

Parameters:

x (Nx1 vector) – data
v (scalar or 2x1 vector) –
If scalar, the function returns the indices of all elements of x equal to v. If 2x1, then the function returns the indices of all elements of x that fall into the range:

\[v[1] < x <= v[2]\]

If v is scalar, it can contain a single missing to specify the missing value as the category.

Returns:

y (Lx1 vector) – Indices of the elements of x which fall into the category defined by v. It will contain error code 13 if there are no elements in this category.

Examples#

x = { 1.0, 4.0, 3.3, 4.2, 6.0, 5.7, 8.1, 5.5 };
v = { 4, 6 };
indx = indexcat(x, v);

inBds = x[indx]

       4           4.20
indx = 5   inBds = 6.00
       6           5.70
       8           5.50