Divide 1D Array into a 2D Array by finding a flag value

Question

Hussam Ibrahim 2017-11-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/368483-divide-1d-array-into-a-2d-array-by-finding-a-flag-value

回答： KSSV 2017-11-22

Hello,

I have a LabVIEW code where I am accquiring timestamps for scan lines, but at the end of each scan line, I have labview add a flag number into the array so I know where each scan line ends. I am trying to write a Matlab code, where I divide this 1D array to a 2D array (each row is the timestamps of 1 scan lines).

e.g. 1D Array = [10 11 12 13 14 15 18 19 0 21 23 24 25 26 27 28 29 0 31 34 35 36 36 38 39 40 0] here 0 is the flag. I want this to become a 2D array that is 2D Array = [10 11 12 13 14 15 18 19; 21 23 24 25 26 27 28 29; 31 34 35 36 36 38 39 40].

Best,

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

KSSV 2017-11-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/368483-divide-1d-array-into-a-2d-array-by-finding-a-flag-value#answer_292476

在 MATLAB Online 中打开

A = [10 11 12 13 14 15 18 19 0 21 23 24 25 26 27 28 29 0 31 34 35 36 36 38 39 40 0] ;
B =  [10 11 12 13 14 15 18 19; 21 23 24 25 26 27 28 29; 31 34 35 36 36 38 39 40] ;
flag = 0 ;
idx = find(A==flag) ;
L = unique(diff(idx)-1) ;  % number of columns 
% remove flags 
A(A==0) = [] ;
% reshape to 2D array
iwant = reshape(A,[],L)