How can l store large numbers from input in App Designer?

l tried to store the inputs in a cell array. Assume l have 1000 input, the first column of array is increasing numbers from 1 to 1000, and the second column is the real inputs (big numbers). Data is stored n the cell array. Then, I take the large numbers from the number in front of them (first column) when l need to make calculations in other buttons. Is there any other way to take inputs directly with their value.

Thanks in advance.

[Steven Lord]

big numbers

How big are these "big numbers" (both in terms of magnitude and in terms of how many digits they have?)

[piston_pim_offset]

They are serial numbers, and have 8 - 10 digits. l thought l can create a cell array larger than that and place them in the corresponding order ( like 123456789 is stored in X{123456789} ), but it would take so much space, so l could not do it.

Answer 1

[Steven Lord]

They are serial numbers, and have 8 - 10 digits. l thought l can create a cell array larger than that and place them in the corresponding order ( like 123456789 is stored in X{123456789} ), but it would take so much space, so l could not do it.

In that case, how are you planning to use them? If you're going to hold say the quantity of the item with that serial number, instead of using a cell array I'd use a sparse column vector. If you're going to hold something more complicated than just a single number, like a struct array containing information about a part in an inventory, consider using a dictionary.

s = sparse(1357924680, 1, 42) % 42 of item 1357924680

s = 
         (1357924680,1)                      42

s(65535, 1) = 99 % 99 of item 65535

s = 
              (65535,1)                      99
         (1357924680,1)                      42

Q = s(98765) % Q = 0 means you have none of item 98765

Q = 
   All zero sparse: 1×1

[piston_pim_offset]

Thank you for real, l'll try this.

By the way, some other values (5 more) are assigned to serial numbers and all of them should be stored. When user stored all data necessary, he/she calls some of them via serial numbers by pushing a button, to make calculations with values assigned to the serial numbers.

[Steven Lord]

So perhaps you need either a sparse matrix (if all the pieces of data associated with an ID are numeric) with one column per piece of data or to use a dictionary to associate a struct or object with each key.

[piston_pim_offset]

Yes, all the pieces of data associated with an ID are numeric, but how am l supposed to get the necessary data after storing them? I could'nt figure it out yet.

[Steven Lord]

Indexing, like I showed with my sparse example.

Sparse

Let's say we had 42 units of item 1357924680. Those items are in color #1 and cost $5.99 per unit. I could store those in three columns in s.

% 42 of item 1357924680 (column 1)
% Those items are in color #1 (column 2)
% The price per item is $5.99 (column 3)
s = sparse(1357924680, 1:3, [42, 1, 5.99])

s = 
         (1357924680,1)                     42.0000
         (1357924680,2)                      1.0000
         (1357924680,3)                      5.9900

Now if I want to add 99 units of item 65535, color #2, with a cost of $17.36 per unit.

s(65535, 1:3) = [99, 2, 17.36]

s = 
              (65535,1)                     99.0000
         (1357924680,1)                     42.0000
              (65535,2)                      2.0000
         (1357924680,2)                      1.0000
              (65535,3)                     17.3600
         (1357924680,3)                      5.9900

How many units of item 98765 are in stock?

Q = full(s(98765, 1)) % Wrapping in full because the full display is nicer here

Q = 0

How many units of item 65535?

Q2 = full(s(65535, 1))

Q2 = 99

How much does each unit of item 65535 cost?

P2 = full(s(65535, 3))

P2 = 17.3600

To make the code easier to understand, you might want to define a few constants.

QUANTITY = 1;
COLOR = 2;
PRICE = 3;
howMany65535 = full(s(65535, QUANTITY))

howMany65535 = 99

Dictionary

Alternately, using a dictionary:

% Could write a function to accept this data and build the struct
item1 = struct('quantity', 42, 'color', 'red', 'price', 5.99);
item2 = struct('quantity', 99, 'color', 'green', 'price', 17.36);
d = dictionary([1357924680, 65535], [item1, item2])

d =

  dictionary (double --> struct) with 2 entries:

    1.3579e+09 --> 1×1 struct
    65535      --> 1×1 struct

infoItem65535 = d(65535)

infoItem65535 = struct with fields:
    quantity: 99
       color: 'green'
       price: 17.3600

If I sold a unit of item 65535:

infoItem65535.quantity = infoItem65535.quantity-1;
d(65535) = infoItem65535;
d(65535) % Now quantity is 98

ans = struct with fields:
    quantity: 98
       color: 'green'
       price: 17.3600

If you want to check if the dictionary has an item:

anyItem42 = isKey(d, 42) % none of item 42 in stock

anyItem42 = logical
   0

Asking for an item you don't know exists (isn't in the dictionary) throws an error.

infoItem42 = d(42)

Error using ()
Key not found.

[piston_pim_offset]

That helped me a lot, I really thank you for cour comments!