Counting First digit of a certain number

12 次查看（过去 30 天）

Min 2024-3-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2093406-counting-first-digit-of-a-certain-number

评论： Min 2024-3-13

Hi, I am working with a large number of data to analyze if there are any failures in data which having some hard time manually looking at the data or even with graphs. So I was wondering if there is a way to count the first digit number out of table which then I just need to look into how many failures happened. Thanks in advance...

For example,

t = [0, 0; 0, 1; 0, 1; 1, 1; 1, 0; 0, 0; 0, 1]
t = 7×2
   0
   1
   1
   1
   0
   0
   1
t2 = [1, 1; 0, 1; 0, 1; 0, 1; 1, 1; 0, 1; 1, 1]
t2 = 7×2
   1
   1
   1
   1
   1
   1
   1
t3 = [0, 1, 1; 1, 0, 0; 1, 1, 0; 1, 0, 1; 1, 1, 0; 0, 0, 1; 1, 1, 1]
t3 = 7×3
   1     1
   0     0
   1     0
   0     1
   1     0
   0     1
   1     1

then

T_count = [1, 2]
T_count = 1×2
     1     2
T2_count = [3, 1]
T2_count = 1×2
     3     1
T3_count = [2, 4, 3]
T3_count = 1×3
     2     4     3

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。

采纳的回答

Stephen23 2024-3-12

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2093406-counting-first-digit-of-a-certain-number#answer_1424111

在 MATLAB Online 中打开

t1 = [0, 0; 0, 1; 0, 1; 1, 1; 1, 0; 0, 0; 0, 1];
t2 = [1, 1; 0, 1; 0, 1; 0, 1; 1, 1; 0, 1; 1, 1];
t3 = [0, 1, 1; 1, 0, 0; 1, 1, 0; 1, 0, 1; 1, 1, 0; 0, 0, 1; 1, 1, 1];
fh = @(m) sum(diff([0*m(1,:);m],1,1)>0,1);
fh(t1)
ans = 1×2
     1     2
fh(t2)
ans = 1×2
     3     1
fh(t3)
ans = 1×3
     2     4     3