Randomizing samples without losing track on labels

I have 5 different images data and I want to shuffle/randomize each time when displayed. I want to keep track on which image I am showing. How I can do it in matlab? For example I have images of cat, dog, cows, lions and tigers. I want to show them to users for 5 trials. How I can keep a track on their labels. Is there any data structure like keys and values in python which can be implemented in Matlab?

Answer 1

[Akshat Dalal]

Hi Vivek,

The dictionary object will be helpful for your problem - https://in.mathworks.com/help/matlab/ref/dictionary.html

[Vivek Raj]

Can you share one of the working code to facilitate understanding

[Akshat Dalal]

Hi Vivek,

There are many examples provided in the link. I'll attach one of them here, but you could always go back to explore more.

wheels = [1 2 3];
names = ["Monocycle" "Bicycle" "Tricycle"];
d = dictionary(names,wheels)

d =

  dictionary (string --> double) with 3 entries:

    "Monocycle" --> 1
    "Bicycle"   --> 2
    "Tricycle"  --> 3

d("Tricycle")

ans = 3

d("Bicycle") = 2.5

d =

  dictionary (string --> double) with 3 entries:

    "Monocycle" --> 1
    "Bicycle"   --> 2.5000
    "Tricycle"  --> 3

d("Car") = 4

d =

  dictionary (string --> double) with 4 entries:

    "Monocycle" --> 1
    "Bicycle"   --> 2.5000
    "Tricycle"  --> 3
    "Car"       --> 4

names2 = ["Truck" "Motorcycle" "Sixteen-Wheeler"];
wheels2 = [4 2 16];
d(names2) = wheels2

d =

  dictionary (string --> double) with 7 entries:

    "Monocycle"       --> 1
    "Bicycle"         --> 2.5000
    "Tricycle"        --> 3
    "Car"             --> 4
    "Truck"           --> 4
    "Motorcycle"      --> 2
    "Sixteen-Wheeler" --> 16

d("Truck") = [] % Remove entries by assigning an empty array to an existing key. 

d =

  dictionary (string --> double) with 6 entries:

    "Monocycle"       --> 1
    "Bicycle"         --> 2.5000
    "Tricycle"        --> 3
    "Car"             --> 4
    "Motorcycle"      --> 2
    "Sixteen-Wheeler" --> 16