Insert elements into vector

Question

NA 2020-10-31

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/632459-insert-elements-into-vector

编辑： Stephen23 2020-11-6

I have a vector 'index' and 'val_index'

index = [1;2;4;5;6;8;9];
index_val = [11;25;3;4;56;7;9];

I remove indices 3 and 7 from the 'index' . The 'removed_index' which I have is the cell array.

removed_index = {[7],[3]};
removed_val = {[1.1],[3.2]};

I want to insert removed indices and the values to the 'index'

Result should be:

index_all = [1;2;3;4;5;6;7;8;9];
index_val_all = [11;25;3.2;3;4;56;1.1;7;9];

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Answer 1

Stephen23 2020-10-31

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/632459-insert-elements-into-vector#answer_530189

在 MATLAB Online 中打开

index = [1;2;4;5;6;8;9];
index_val = [11;25;3;4;56;7;9];
removed_index = [7,3];   % simpler to use a numeric array
removed_val = [1.1,3.2]; % simpler to use a numeric array

Then all you need is:

idx = [index(:);removed_index(:)];
vec = [index_val(:);removed_val(:)];
vec(idx) = vec
idx(idx) = idx

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NA 2020-11-6

编辑：NA 2020-11-6

在 MATLAB Online 中打开

If the 'index' is something like this:

index = [1;4;5;8;9];
index_val = [11;3;4;56;7];
removed_index = [7,3];   % simpler to use a numeric array
removed_val = [1.1,3.2]; % simpler to use a numeric array

If I use the above code,

idx = [index(:);removed_index(:)];
vec = [index_val(:);removed_val(:)];
vec(idx) = vec
idx(idx) = idx

I got this result

idx =[1;4;3;4;5;7;7;8;9]
vec =[11;3;3.2;3;4;1.1;1.1;56;7];

How can I get this result

idx =[1;3;4;5;7;8;9]
vec = [11;3.2;3;4;1.1;56;7]

Stephen23 2020-11-6

编辑：Stephen23 2020-11-6

在 MATLAB Online 中打开

index = [1;4;5;8;9];
index_val = [11;3;4;56;7];
removed_index = [7,3];   % simpler to use a numeric array
removed_val = [1.1,3.2]; % simpler to use a numeric array
idx = [index(:);removed_index(:)];
vec = [index_val(:);removed_val(:)];
[idx,ids] = sort(idx); idx
idx = 7×1
     1
     3
     4
     5
     7
     8
     9
vec = vec(ids)
vec = 7×1
   11.0000
    3.2000
    3.0000
    4.0000
    1.1000
   56.0000
    7.0000
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