Creating an array which has the linear index of the element left of each position.

Question

Jared Dube 2022-10-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1826768-creating-an-array-which-has-the-linear-index-of-the-element-left-of-each-position

评论： Walter Roberson 2022-10-15

I'm trying to use MATLAB functions to creating a 9x11 array which has the linear index of the element left of each position that replaced the undefined variables with 0's. Currently I have the code to create it as a 9x10 array but am not sure how to include the row of 0's for the undefined variables to make it a 9x11 array using functions. Any help would be very much appreciated.

clearvars
clc
close all
L = reshape(1:90,9,10);
L(1,:) = zeros(1,1);

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 2022-10-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1826768-creating-an-array-which-has-the-linear-index-of-the-element-left-of-each-position#answer_1075248

在 MATLAB Online 中打开

I am not clear as to what you want to do, but

L = reshape(1:90,9,10);
L = [zeros(size(L,1),1), L]
L = 9×11
   1    10    19    28    37    46    55    64    73    82
   2    11    20    29    38    47    56    65    74    83
   3    12    21    30    39    48    57    66    75    84
   4    13    22    31    40    49    58    67    76    85
   5    14    23    32    41    50    59    68    77    86
   6    15    24    33    42    51    60    69    78    87
   7    16    25    34    43    52    61    70    79    88
   8    17    26    35    44    53    62    71    80    89
   9    18    27    36    45    54    63    72    81    90

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Walter Roberson 2022-10-15

在 MATLAB Online 中打开

A different approach

L = reshape(1:90,9,10);
L(:,end+1) = 0;
L = circshift(L, [0 1])
L = 9×11
     0     1    10    19    28    37    46    55    64    73    82
     0     2    11    20    29    38    47    56    65    74    83
     0     3    12    21    30    39    48    57    66    75    84
     0     4    13    22    31    40    49    58    67    76    85
     0     5    14    23    32    41    50    59    68    77    86
     0     6    15    24    33    42    51    60    69    78    87
     0     7    16    25    34    43    52    61    70    79    88
     0     8    17    26    35    44    53    62    71    80    89
     0     9    18    27    36    45    54    63    72    81    90