Map matrix element to string

Question

I would like to map numeric output from a matrix to a string.

Given

compute=[ 7, 4, 3; 3, 4, 7]

how can one obtain a string mappin

Answer 1

MATLAB has a Map container type that makes this very straighftorward:

keySet = [7, 4, 3];
valSet = {'Run', 'Walk', 'Jog'};
map = containers.Map(keySet,valSet);

Get the requested values:

>> vals = values(map,num2cell(compute))
vals = 
    'Run'    'Walk'    'Jog'
    'Jog'    'Walk'    'Run'

This is a class after all, so you can also use a more familiar OOP syntax for calling the values method:

>> vals = map.values(num2cell(compute))
vals = 
    'Run'    'Walk'    'Jog'
    'Jog'    'Walk'    'Run'