Generating input binary sequences in an order
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Hi,
I have a binary sequence for a 3-bit input which goes like 0-0,0-1,...0-7 (say for a single circuit). I want to iterate this for 3 circuits...which would effectively lead to the same input transitions being repeated over (2^3)^3 times (but in different orders like 0-5,0-1,0-3, ..etc and so on..) How can I do this in MATLAB?
I tried using repmat...but it was not much of a help...Thanks!
5 Comments
Jan
on 2 Oct 2017
@Kash022: What exactly is 000? Do you mean the char vector '000'? I do not "see the sequence". What is "each column of [input2 input1 input0]"? Is it each character? Does "0-0" mean a [1 x 2] vector? If so, please do not invent a new notation using the minus operator. Standard Matlab syntax is known in the forum: [0,0]
I still do not know, what the inputs are (in Matlab syntax) and what you want to achieve.
Answers (1)
Guillaume
on 2 Oct 2017
Like others, I really don't understand the syntax 0-0, 0-7. I get that you've got 8 different possibilities (0 to 7) for choosing two bits at a time, but I've no idea what the 0- represent, nor how you encode that in matlab.
Anyway, there are two easy way to generate all permutations of choosing n elements at a time of a set of size s:
- Using dec2base, this is limited to sets of size 10 at most:
n = 3;
s = 8;
permutations = dec2base(0:s^n-1, s) - '0'
- Using ndgrid, this is less limited, but more lines of code:
n = 3;
s = 8;
permutations = cell(1, n);
[permutations{:}] = ndgrid(0:s-1);
permutations = reshape(cat(n+1, permutations{:}), [], n)
From there, you can change the permutation matrix to whatever you want, e.g. if you wanted to write the 0-7 as char arrays '0-0' to '0-7', then:
fullset = compose('0-%d', 0:7);
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