How to check the number of ones from certain row to the 1st row?

Question

fyza affandi 2018-11-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/432147-how-to-check-the-number-of-ones-from-certain-row-to-the-1st-row

评论： Image Analyst 2018-11-27

t(:,:,1) =
  10    19    28    37    46    55    64    73    82
  11    20    1     38    47    56    65    74    83
  12    21    30    39    48    57    66    75    84
  13    22    31    40    49    58    67    76    85
  14    1     32    41    50    59    68    77    86
  15    24    33    42    51    60    69    78    87
  16    25    34    43    1     61    70    79    88
  17    26    35    44    53    62    71    80    89
  18    27    36    45    54    63    72    81    90
t(:,:,2) =
 100   109   118   127   136   145   154   163   172
 101   110   119   128   137   146   155   164   173
 102   111   120   129   138   147   156   165   174
 103   112   121   1     139   148   157   166   175
 104   1     122   131   140   149   158   167   176
 105   114   123   132   141   150   159   168   177
  106   115   124   133   142   151   160   169   178
 107   116   125   134   143   152   161   170   179
 108   117   126   1     144   153   162   171   180

How to check the number of ones but starting from row 7 till the 1st row for both matrices?

Is it using for loop ?

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

Walter Roberson 2018-11-27

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/432147-how-to-check-the-number-of-ones-from-certain-row-to-the-1st-row#answer_349063

squeeze( sum( t(1:7, :, :) == 1, 1 ) )

the result would be 10 x 2 -- the 10 columns of t and the 2 panes.

3 个评论
显示 1更早的评论隐藏 1更早的评论

fyza affandi 2018-11-27

编辑：fyza affandi 2018-11-27

What if I want it by row instead of counting ones by column?

9 rows of t and the 2 panes

Image Analyst 2018-11-27

Gvie numerical example, including both inputs and the desired output.

I don't even know what "row 7 till the 1st row" means. Doesn't really make sense in English. "till" usually means "until". So "row 7 until..." would mean from row 7 (inclusive) until some row larger than 7, like 8, 9, 100, etc. NOT row 1, which is in the backward/smaller direction.

请先登录，再进行评论。