Consecutive elements of a vector in matlab

Question

I am trying to display some value of n consecutive numbers of a vector (in this example, vector x).

For example, I may want the first 3 values of 4 consecutive numbers which would be (3 values of 4 bits each):

1111
1100
0011

I may want the first 4 values of 2 consecutive numbers which would be (4 values of 2 bits each):

x is a double array. What would be an easy way to achieve this?

user_7328782 · Answer

The simplest way is to reshape x to a matrix with your desired number of bits per value as the number of rows (MATLAB is column-major). For example, to get 4-digit values:

t = reshape(x,4,[]);

This will only work if the length of x evenly divides into 4. You could first crop x to the right number of elements to avoid errors where the length is not evenly divisible:

t = reshape(x(1:4*3),4,[]);

Now the transposed matrix t, converted to a string, looks like your desired output:

c = char(t.' + '0');

The output is a 3x4 char array:

    '1111'
    '1100'
    '0011'

You can convert these binary representations back to numbers with bin2dec:

b = bin2dec(c);

The output is a 3-element double vector:

    15
    12
     3

Consecutive elements of a vector in matlab

1 Answers