Hi, how to adding value to array in existing array ?

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Oman Wisni 2018-10-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/425512-hi-how-to-adding-value-to-array-in-existing-array

编辑： Oman Wisni 2018-11-6

I have aray containing headers and values from some feature extractions. I also have 275 images. When I run my code, I want the value from the overall extraction of my image to be stored in the same array without deleting the extraction value of the previous image feature. below I created a code that only stores feature extraction values from one image, when I run the code for the next image, the previous value disappears. Please help me to complete my code. Thanks

    header = {'area','perimeter','roundness','solidity','slimness','rectangu','NF','RPD'};
    classinfo = {Area Perimeter Round Slimness Rect soli NF RPD RPLW};
    Fitur = [header; classinfo];

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Oman Wisni 2018-10-23

编辑：Oman Wisni 2018-10-23

在 MATLAB Online 中打开

Thanks sir. Sir I already trying you code

for i = 1:total_image
    total_image = numel(fname);
    header = {'area','perimeter','roundness','solidity','slimness','rectangu','NF','RPD'...
              'RPLW','M1','M2','M3','M4','M5','M6','M7','mu','deviasi','energi','entropi','smoothness'...
              'contrast','homogenitas','energi','korelation'};
 if true  
    classinfo = {Area Perimeter Round Slimness Rect soli NF RPD RPLW...
                 M1 M2 M3 M4 M5 M6 M7...
                 mu deviasi energi entropi smoothness...
                 contr homom energ corr};
       Fitur{i} = [header; classinfo];
   end
end

But I get result like below, the result still removing the previous values sir

I want in one array to store all the values of all images like in Excel,

example: first row is filled by the extraction value of feature image 1

second row is filled by the extraction value of feature image 2, and so on until the total image is available..

this I mean

Id is the ID for every image and F1 - F11 is the feature extraction.

Thanks sir

Kevin Chng 2018-10-23

编辑：Kevin Chng 2018-10-23

Does it working for you? if yes, kindly accept my answer.

Oman Wisni 2018-10-23

of course sir, I received all your answers.

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采纳的回答

Kevin Chng 2018-10-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/425512-hi-how-to-adding-value-to-array-in-existing-array#answer_342847

编辑：Kevin Chng 2018-10-23

在 MATLAB Online 中打开

Solution is to save the array in .mat file, therefore, for next time to run the script, it will load the mat file, and add new value to the variable/table in the .mat file.

%save in array matlab
try
load Fitur.mat
catch me
end
if exist('Fitur','var')~=0
height = size(Fitur,1);
ID =  height+1;
else
Fitur = [];
ID = 1;
end
classinfo = [ID area  perimeter  roundness solidity  slimness rectangu  NF  RPD...
                    RPLW M1  M2  M3 M4 M5 M6 M7  mu  deviasi  energi  entropi smoothness...
                    contrast homogenitas energi korelation];
Fitur = [Fitur; classinfo]; 
Fiturtable=array2table(Fitur);
header = {'ID' 'area','perimeter','roundness','solidity','slimness','rectangu','NF','RPD'...
              'RPLW','M1','M2','M3','M4','M5','M6','M7','mu','deviasi','energi','entropi','smoothness'...
              'contrast','homogenitas','energi2','korelation'};
Fiturtable.Properties.VariableNames = header;
save('Fitur.mat','Fitur','Fiturtable')

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Oman Wisni 2018-10-24

在 MATLAB Online 中打开

Sir, I deleted it and even changed the name "Fitur" to 'Input',so that is no longer the cause. But the result is still the same as the one above.

Error using cobahitung_manual (line 147)

The VariableNames property must contain one name for each variable in the table

Then I modified some code and I get new error like below:

this my code 
 try
  load Input.mat
  catch me
  end
  if exist('Input','var')~=0
  height = size(Input,1);
  else
  Input = [];
  IDName=[];
  end
      classinfo = [IDName Area Perimeter Round Slimness Rect soli NF RPD RPLW...
                   M1 M2 M3 M4 M5 M6 M7...
                   mu deviasi energi entropi smoothness...
                   contr homom energ corr];
      Input = [Input; classinfo]; 
      Inputtable=array2table(Input);
      header = {'IDName','area','perimeter','roundness','solidity','slimness','rectangu','NF','RPD'...
                'RPLW','M1','M2','M3','M4','M5','M6','M7','mu','deviasi','energi','entropi','smoothness'...
                'contrast','homogenitas','energi2','korelation'};
  %Inputtable.Properties.VariableNames = header;
  ID = foldername;
  IDName = [IDName;ID];
  Inputtable2 = [table(IDName) Inputtable];
  Inputtable2.Properties.VariableNames(1) = header;
  save('Input.mat','Input','Inputtable2');

Oman Wisni 2018-10-29

编辑：Oman Wisni 2018-10-29

在 MATLAB Online 中打开

Sir, I already tryinng to fix my code, here my code :

try
  load target.mat
  catch me
end
  if exist('target','var')~=0
  height = size(target,1);
  else
  target = [];
  IDName=[];
  end
  target = zeros(1,175);
  target(:,1:25) = 1;
  target(:,26:50) = 2;
  %target(51:75,:) = 3;
  %target(76:100,:) = 4;
  %target(101:125,:) = 5;
  %target(121:150,:) = 6;
  %target(151:175,:) = 7;
  %target(176:200,:) = 8;
  %target(201:225,:) = 9;
  %target(226:250,:) = 10;
  %target(251:275,:) = 11;
    target = target();
    targettable = array2table(target);
    ID = cellstr(foldername); %String
    IDName = [IDName;ID];
    targetttable2 = [table(IDName) targettable];
    %targettable.Properties.VariableNames = target;
    save('target.mat','target','targettable','IDName');

I get result what I want, but that assign to coloum, like below

when I run it for the second time with different types of image it was error. And I already trying with code which already you give, but the result same too. Thanks

target(1:25,:) = 1;

Kevin Chng 2018-10-30

在 MATLAB Online 中打开

targetttable2 = [table(IDName) targettable];

Your problem is now you only got one row of 1Dname, but targettable has 275 rows.

Therefore, their dimension is different.

I'm not really sure what are you trying to do. But I advise to add your classification to your original table instead.

As your code become more complicated, you have to equip yourself with some MATLAB knowledge. How to merge table/array with same dimension?

Columns & Row? *

Indexing in MATLAB*

for your code, coding is very dynamic, I try to edit your code for your need

try
    load Input.mat
    catch me
    end
    if exist('Input','var')~=0
    height = size(Input,1);
    else
    Input = [];
    IDName=[];
    end
    classinfo = {area  perimeter  roundness solidity  slimness rectangu  NF  RPD...
                    RPLW contrast homogenitas energi korelation};
    Input = [Input; classinfo]; 
    Inputtable=array2table(Input);
    header = {'IDName','area','perimeter','roundness','solidity','slimness','rectangu','NF','RPD'...
                  'RPLW','contrast','homogenitas','energi2','korelation'};ID = cellstr(fnameN); %String
    IDName = [IDName;ID];
    IDdimension = size(ID,1);
    Classification = ceil(IDdimension/5);
    Inputtable2 = [table(IDName) Inputtable];
    Inputtable2.Properties.VariableNames = header;       
    save('Input.mat','Input','Inputtable2','IDName');

or refer to attached.

Classification = ceil(IDdimension/5);

the line above is playing the trick that first 5 image classified as 1, subsequently classified as 2, and.....

Oman Wisni 2018-11-1

在 MATLAB Online 中打开

Hi, Mr.Kevin. Thanks for your answer. I did not ask again cause I not brave for do it. I'm really appreciated your answer, Thank you. Your first answer is very helpful and according to my wishes, but for this one it's not like that.

I'm sorry sir.

1. In this code you say the line above is playing the trick that first 5 image classified as 1, subsequently classified as 2, and.....

But when I run more than 5 image, it still classified as 1. And in the input.mat table there is no additional column for classified.

Classification = ceil(IDdimension/5);

2. I want to classify images of 1st species consisting of 25 images into target 1st, and so on until the 11th species for target 11th. To find out the species is entered into target 1st or 2nd ... 11th it is specified by IDName which get from the name of the image entered.

Maybe in declaring using the IF statement. I can only make the logic but to make the matlab understand what I want I can't, sir. For example like this:

if IDName = Piper
        Target = 1;
ifelse IDName = Jasminum
        Target = 2
  ... until if IDName = Guajava
       Target = 11;

And save all this result in the Target table which is filled with IDName and target. So that later the results in the target table are like this, here with the illustrations :

Thank you sir

Kevin Chng 2018-11-1

All the best

Oman Wisni 2018-11-6

编辑：Oman Wisni 2018-11-6

allimage.m

Sir, I want to take all the pictures from my folder. I have made a code to take all the pictures and from each of the images I extracted the feature. after getting the value from feature extraction I want to save it in a table that was created. but I got an Error using cellstr.

Here I attached the file sir, please help me to fix my code sir. Thank you sir

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Hi, how to adding value to array in existing array ?

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