CODEWITHSUNDEEP
stringmatlabvectorbinary
ImbaBalboa
ImbaBalboa

Reputation: 867

Binary vector to string

I would like to convert a binary vector of 24 bits to a single string.

For example, I should get the string: '101010101010101010101010' from this vector: [1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0]

I tried this : 

binary_vector = [1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0];
A = num2str(binary_vector);
l = length(A);

And I obtain :

A =

1  0  1  0  1  0  1  0  1  0  1  0  1  0  1  0  1  0  1  0  1  0  1  0


l =

    70

What I don't understand is why my length of A is 70? Shouldn't be 24?

Upvotes: 0

Views: 1803

Answers (2)

rayryeng
rayryeng

Reputation: 104514

That's because you are also including spaces in the final result. beaker in his answer above suggested the proper way to do it using a format specifier with num2str or sprintf. However, if your string just consists of 0/1, another method I can suggest is to add 48 to all of your numbers, then cast with char:

A = char(binary_vector + 48);

The ASCII code for 0 and 1 is 48 and 49 respectively, so if you add 48 to all of the numbers, then use char, you would be representing each number as their ASCII equivalents, thus converting your number to a string of 0/1.

Something more readable can be:

A = char(binary_vector + '0');

The '0' gets coalesced into its equivalent double value, which is 48 as that is the ASCII code for 0. When you add something to a double, which is what binary_vector is - a vector of doubles, the type gets converted to its equivalent double type. It depends on your preference, but I use the first one out of habit because of code golfing.

We get:

>> A

A =

101010101010101010101010

Upvotes: 4

beaker
beaker

Reputation: 16801

Try:

A = num2str(binary_vector,'%d')
or
A = sprintf('%d',binary_vector);

A = 101010101010101010101010

Upvotes: 1

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