Creating a table for the "For-loop command" results:

Question

Gyp 2019-12-21

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/497660-creating-a-table-for-the-for-loop-command-results

编辑： Stephen23 2019-12-21

Hi,

I am working on a task. I have to use the "for-loop" command. I already used it, now I would like to create a table with the results. I would like to see in the table the option of the menu that was selected and the number of seeds that are allowed given the area that the person inserted. But I don't know how to make that table with the well established results. I don't know a command for it.

clear
clc
n=input('Enter the number of time you want this program to run.n=  ');
Area=input('Enter the area of the land in m2. Area=  ');
D = sqrt(Area*10000); %This will change the area from m2 to cm. 
    for i=1:n
        
v= menu('Select the aromatic species with which you will work:', 'Basil' ,'Cilantro', 'Dill', 'Tarragon', 'Spearmint', 'Oregano', 'Parsley', 'Thyme'); 
if v==1 
      distrows =15;
      distplant = 30;
elseif v==2
      distrows= 15;
      distplant =20;
elseif v==3
      distrows =15;
      distplant = 20;
elseif v==4 
      distrows =15;
      distplant = 20;
elseif v==5
      distrows =25;
      distplant = 50; 
elseif v==6 
      distrows =15;
      distplant=20; 
elseif v==7
      distrows =15;
      distplant = 20; 
elseif v==8 
      distrows =15;
      distplant = 20; 
end  
  rows=D/distrows;
  seedrow=rows/distplant;
  seeds=round(rows *seedrow)
  
    end

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Stephen23 2019-12-21

编辑：Stephen23 2019-12-21

Note that a "table" is a particular data type in MATLAB, most likely you are referring to a "numeric array" or a "numeric matrix".

"I don't know a command for it."

You will need to use indexing to allocate the output to an array. How to do that is shown in the introductory tutorials:

https://www.mathworks.com/help/matlab/getting-started-with-matlab.html

and I would also recommend reading this:

https://www.mathworks.com/help/matlab/matlab_prog/preallocating-arrays.html

Also note that you can replace all of that if - else construct with a few vectors and some basic indexing, it would take just a few lines of code.

Use of indexing is one of MATLAB's main features, and if you want to learn how to use MATLAB then you need to learn to think in terms of vectors/matrices/arrays and their indices.

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Answer 1

Ridwan Alam 2019-12-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/497660-creating-a-table-for-the-for-loop-command-results#answer_407319

编辑：Ridwan Alam 2019-12-21

Even though there are many more efficient ways to do this, this is a simple addition to your code:

clear
clc
n=input('Enter the number of time you want this program to run.n=  ');
Area=input('Enter the area of the land in m2. Area=  ');
D = sqrt(Area*10000); %This will change the area from m2 to cm. 
myTable = zeros(n,2);
for i=1:n
    v= menu('Select the aromatic species with which you will work:', 'Basil' ,'Cilantro', 'Dill', 'Tarragon', 'Spearmint', 'Oregano', 'Parsley', 'Thyme'); 
    if v==1 
        distrows =15;
        distplant = 30;
    elseif v==2
        distrows= 15;
        distplant =20;
    elseif v==3
        distrows =15;
        distplant = 20;
    elseif v==4 
        distrows =15;
        distplant = 20;
    elseif v==5
        distrows =25;
        distplant = 50; 
    elseif v==6 
        distrows =15;
        distplant=20; 
    elseif v==7
        distrows =15;
        distplant = 20; 
    elseif v==8 
        distrows =15;
        distplant = 20; 
    end  
    rows=D/distrows;
    seedrow=rows/distplant;
    seeds=round(rows *seedrow)
    
    myTable(n,:) = [v,seeds];
  
end
% if you really prefer it as a "table"
myTable = array2table(myTable); 