How do i check the frequency of an element in a multi level cell array?

Question

Prajwal Venkatesh 2020-1-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501106-how-do-i-check-the-frequency-of-an-element-in-a-multi-level-cell-array

评论： Turlough Hughes 2020-1-24

采纳的回答： Turlough Hughes

The multi level cell array has 61 cells and each of these 61 elements have around 25*30 cells.

7 个评论
显示 5更早的评论隐藏 5更早的评论

Prajwal Venkatesh 2020-1-23

>> result2

result2 =

1×25 cell array

Columns 1 through 6

{25×1 cell} {24×1 cell} {26×1 cell} {26×1 cell} {23×1 cell} {26×1 cell}

Columns 7 through 12

{26×1 cell} {26×1 cell} {15×1 cell} {24×1 cell} {26×1 cell} {26×1 cell}

Columns 13 through 18

{26×1 cell} {23×1 cell} {13×1 cell} {27×1 cell} {27×1 cell} {24×1 cell}

Columns 19 through 24

{24×1 cell} {23×1 cell} {26×1 cell} {26×1 cell} {21×1 cell} {26×1 cell}

Column 25

{23×1 cell}

>> result2{1,1}

ans =

25×1 cell array

{["LT4437"]}

{["PP5041"]}

{["TP2019"]}

{["RP3015"]}

{["RP3012"]}

{["RP2018"]}

{1×2 string}

{["RP2010"]}

{["RP2126"]}

{["RP1030"]}

{["RP1015"]}

{["RP2040"]}

{["RP1050"]}

{["RP2020"]}

{["RP2030"]}

{["RP2050"]}

{["RP1050"]}

{["RP4008"]}

{["RP1025"]}

{["RP3012"]}

{["RP3010"]}

{["RP3020"]}

{["RP3015"]}

{["RP3010"]}

I want to check how many times each element appears in the array

Turlough Hughes 2020-1-23

在 MATLAB Online 中打开

Is there a reason you need a new array with similar structure to results2? It'd probably be much easier to make a unique list of the strings and list the corresponding frequencies alongside them.

Secondly, it's worth confirming what Dinesh asked with the following code:

test = cellfun(@(x) cellfun(@class,x,'UniformOutput',false),results2,'UniformOutput',false);
unique(vertcat(test{:}))

Or better yet, attach results2, with the paperclip button.

Prajwal Venkatesh 2020-1-23

asd.mat

I just need to know which elements in this array only appear once .

and yes i agree that a unique list of strings and corresponding frequencies should be fine given that they are in the same order as they are present in the arrays.

I am attaching results 2 variable

Thanks a lot!

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Turlough Hughes 2020-1-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501106-how-do-i-check-the-frequency-of-an-element-in-a-multi-level-cell-array#answer_411712

编辑：Turlough Hughes 2020-1-24

在 MATLAB Online 中打开

The following loads and concatenates all elements of your cell array, including the 1 x 2 string in result2{1,1}(7), into a single column string array called elements:

load asd
elements = vertcat(result2{:});
elements = [elements{:}].';

The next step is to get a unique list of names and the index iNames which can be used to get frequency as follows:

[NameList,~,iNames] = unique(elements,'stable');  
Frequency = histcounts(iNames,numel(NameList)).'; 
T = table(NameList, Frequency)

The second input to the unique function is used to maintain the order of the input array, you might also like to have a look at the documentation on unique regarding the third output.

Edit: Modified unique to maintain the order and included some description of the code.

2 个评论
显示无隐藏无

Prajwal Venkatesh 2020-1-24

Great!

But the list is in chronological order , I need it in the order exactly as it is in the array.

Turlough Hughes 2020-1-24

I modified my answer slightly; just including 'stable' on the second input to the unique function. The table, T, then has the results ordered according to how they first appear in result2, moving through your original cell array as follows: result2{1,1}, result2{1,2}, result2{1,3}, etc. I assume that's what you mean.

请先登录，再进行评论。

How do i check the frequency of an element in a multi level cell array?

7 个评论
显示 5更早的评论隐藏 5更早的评论

采纳的回答

2 个评论
显示无隐藏无

更多回答（0 个）

另请参阅

类别

标签

Community Treasure Hunt

How do i check the frequency of an element in a multi level cell array?

7 个评论 显示 5更早的评论隐藏 5更早的评论

采纳的回答

2 个评论 显示 无隐藏 无

更多回答（0 个）

另请参阅

类别

标签

Community Treasure Hunt

7 个评论
显示 5更早的评论隐藏 5更早的评论

2 个评论
显示无隐藏无