reclassify

Purpose

Replaces specified values of a matrix, array or string array

Format

x_new = reclassify(x, from, to)
Parameters:
  • x (NxK matrix or string array or NxKxP array) – data to be recoded (changed).
  • from (Kx1 vector or string array) – values to change.
  • to (Kx1 vector or string array) – contains the new values to be assigned to the recoded variable.
Returns:

x_new (NxK matrix or string array or NxKxP array) – Contains the recoded values of x, will have the same dimensions as the input x.

Examples

Change instances of 1, 2 and 3 to ‘low’, ‘medium’ and ‘high’.

// Vector to be changed
x = { 2,
      3,
      2,
      1,
      2,
      3 };

from = { 1,
         2,
         3 };

// Create a 3x1 string array using
// string vertical concatenation operator
to = "low" $| "medium" $| "high";

x_new = reclassify(x, from, to);
print x_new;

After the code above, x_new is equal to:

medium
  high
medium
   low
medium
  high

Change instances of tea types: ‘black’, ‘green’, ‘oolong’ to 9.95, 11.95 and 10.50, respectively.

string orders  = { "green",
                   "green",
                   "oolong",
                   "green",
                   "green",
                   "green",
                   "black" };

string tea_types   = { "black",
                       "green",
                       "oolong" };

price = { 9.95, 11.95, 10.50 };

order_prices = reclassify(orders, tea_types, price);
print order_prices;

After the code above, order_prices is equal to:

11.95
11.95
10.50
11.95
11.95
11.95
 9.95