How can I convert following script to function?

Question

Sel 2015-8-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/232286-how-can-i-convert-following-script-to-function

编辑： Jan 2022-2-6

Hi all,

I am having trouble converting following script to function. Function need to have xxx(image,factor). My script is below.

a=imread('cameraman.tif');
[m n] = size(a);
p = 2;
for i=1:m %loop to extract every row
      for j=1:n %loop to extract every column
          for k=1:p %loop to control the number of replication
              b(i,(j-1)*p+k)=a(i,j); %replication pf pixels in row wise 
          end
      end
end
c=b;
[m n]=size(c);
for i=1:n %loop to extract every column
      for j=1:m %loop to extract every row
          for k=1:p %loop to control the number of replication
               b((j-1)*p+k,i)=c(j,i); %replication pf pixels in row wise
          end
    end
end 
imshow (a), title('Original Image')
figure, imshow(b), title('Resized Image')
xlabel(sprintf('Resizing factor is %g', p))

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Answer 1

Al Dente 2015-8-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/232286-how-can-i-convert-following-script-to-function#answer_188179

在 MATLAB Online 中打开

function xxx(image,p)
  a=imread(image);
    [m n] = size(a);
    % remove this line p = 2;

if you don't want to change much of your code then take the above function header I guess, where image is the image you want to use.

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Al Dente 2015-8-4

编辑：Al Dente 2015-8-4

did you put your entire code in an m file and save it? does the m file exist in matlab path? -- the file name must be xxx.m in this case

Al Dente 2015-8-4

编辑：Jan 2022-2-6

在 MATLAB Online 中打开

function xxx(image,p)
a=imread(image);
[m n] = size(a);
%p = 2;
for i=1:m %loop to extract every row
      for j=1:n %loop to extract every column
          for k=1:p %loop to control the number of replication
              b(i,(j-1)*p+k)=a(i,j); %replication pf pixels in row wise
          end
      end
end
c=b;
[m n]=size(c);
for i=1:n %loop to extract every column
    for j=1:m %loop to extract every row
       for k=1:p %loop to control the number of replication
           b((j-1)*p+k,i)=c(j,i); %replication pf pixels in row wise
       end
    end
end
imshow (a), title('Original Image')
figure, imshow(b), title('Resized Image')
xlabel(sprintf('Resizing factor is %g', p))
end

this should be your code basically, put that in a new m file and save it as xxx.m and make sure to have it in your matlab path -- see addpath.

then you can xxx('cameraman.tif', 2) -- 'cameraman.tif' has to be in your matlab path as well, if not then use the entire path --> 'c:\foo\bar\cameraman.tif'

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