how to keep certain rows value in specific columns

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Ayesha Punjabi
Ayesha Punjabi 2019-4-14
评论： Geoff Hayes 2019-4-14
  • I have a t matrix with 10 rows
  • 1 0 1 1 0
  • 1 1 0 0 0
  • 0 1 1 0 1
  • 1 0 1 0 1
  • 1 1 1 0 0
  • 0 0 1 1 0
  • 0 0 1 1 0
  • 1 1 0 0 1
  • 1 1 1 1 1
  • 1 1 0 0 1
row 1 and 2 is assumed to be part a
row 3 and 4 as part b
row 5 and 6 as part c
row 7 and 8 as part d
row 9 and 10 as part e
codes matrix is a 32 by 32 matrix. after performing xor operation such that row 1 is xor with first 16 bits (i.e 1 to 16) of codes and stored in 1 to 16 bits of out matrix
and row 2 with next 16 (i.e 16 to 32) bits of codes and stored in 16 to 32 bits of out matrix. please help me in how to should I proceed with it.
  • t = randi(0:1,1,5); -------------------------> generating random binary data in 10 rows
  • N = 16; ---------------------------------------> generating hadamard matrix to have a matrix with codes to be used for xor operation with t matrix
  • hadamardmat = hadamard(N);
  • codeTx1 = hadamardmat(:,1);
  • codeTx2 = hadamardmat(:,2);
  • codeTx3 = hadamardmat(:,3);
  • codeTx4 = hadamardmat(:,4);
  • codeTx5 = hadamardmat(:,5);
  • codeTx6 = hadamardmat(:,6);
  • codeTx7 = hadamardmat(:,7);
  • codeTx8 = hadamardmat(:,8);
  • code_Tx9 = hadamardmat(:,9);
  • code_Tx10 = hadamardmat(:,10);
  • code_Tx11 = hadamardmat(:,11);
  • code_Tx12 = hadamardmat(:,12);
  • code_Tx13 = hadamardmat(:,13);
  • code_Tx14 = hadamardmat(:,14);
  • code_Tx15 = hadamardmat(:,15);
  • code_Tx16 = hadamardmat(:,16);
  • allcodes = [codeTx1 codeTx2 codeTx3 codeTx4 codeTx5 codeTx6 codeTx7 codeTx8 code_Tx9 code_Tx10 code_Tx11 code_Tx12 code_Tx13 code_Tx14 code_Tx15 code_Tx16];
  • codes_p = allcodes;
  • allcodes_p(codes_p == -1) = 0;
  • s=codes_p;
  • no_oftags = 10;
  • out = zeros(no_oftags,16); ---------------------------------> following for loop in this manner
  • for n = 1:no_oftags
  • out(n,:) = xor(t(1,n),codes_p(n,:)); -------------------------> xor operation of t matrix and codes matrix
  • end
  1 个评论
Geoff Hayes
Geoff Hayes 2019-4-14
Ayesha - I don't understand why you create the individual code_Tx arrays (the columns of hadamardmat) which you then just use to create a new matrix allcodes which is presumably identical to hadamardmat... Also, since each row of t has five columns, how do you want to xor this data with a row of allcodes which has sixteen elements per row? How should we then get a 32x32 matrix from all of this?

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