how to get answer from tic tok command that stays on the screen

Question

lilly lord 2020-4-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517299-how-to-get-answer-from-tic-tok-command-that-stays-on-the-screen

评论： lilly lord 2020-4-17

Hi, I m using tic toc commamand , but answer appears in commad window for nano sec, i think and then disappears. i have attached the code. can some one tell me where is the mistake?I cannot record the values.

function .....
    .....
tic
for i=0:total_Blocks-1
    
    Plain_Text=linear_Image((i*16)+1:(i*16)+16);
    
    Cipher_Text = cipher (Plain_Text, w, s_box, poly_mat, 1);
    re_plainText = inv_cipher (Cipher_Text, w, inv_s_box, inv_poly_mat, 1);
       
    enImage((i*16)+1:(i*16)+16)=Cipher_Text;
    deImage((i*16)+1:(i*16)+16)=re_plainText;%Retrieved Plain Text
    
toc
end
figure,
imshow(uint8(enImage));
end

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Answer 1

per isakson 2020-4-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517299-how-to-get-answer-from-tic-tok-command-that-stays-on-the-screen#answer_425512

编辑：per isakson 2020-4-12

在 MATLAB Online 中打开

Replace

toc

by

elapsed_time = toc;

which saves the elapsed time iin the variable, elapsed_time. And add

elapsed_time

after imshow()

In response to comment

The first mistake is that tic is outside the for-loop and toc inside. I missed that because toc wasn't intended. That raises the question which elapsed time do you want to measure.

Try something like this

function    elapsed_time = xyz(  )
    
    % code
    
    elapsed_time = nan( total_Blocks, 1 );
    for ii=0:total_Blocks-1
        tic
        Plain_Text=linear_Image((ii*16)+1:(ii*16)+16);
        Cipher_Text = cipher (Plain_Text, w, s_box, poly_mat, 1);
        re_plainText = inv_cipher(Cipher_Text, w, inv_s_box, inv_poly_mat, 1);
        
        enImage((ii*16)+1:(ii*16)+16)=Cipher_Text;
        deImage((ii*16)+1:(ii*16)+16)=re_plainText;%Retrieved Plain Text
        
        elapsed_time(ii+1) = toc;
    end
    figure,
    imshow(uint8(enImage));
end

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per isakson 2020-4-13

编辑：per isakson 2020-4-13

"nothing works" is not a very useful response. What exactly doesn't work?

"[I] have tried ur function as well" How did you call my function? The output variable, elapsed_time, was it empty on return?

lilly lord 2020-4-17

sorry i m new in coding , later i work on ur ur comment /answer

"The first mistake is that tic is outside the for-loop and toc inside. I missed that because toc wasn't intended. That raises the question which elapsed time do you want to measure.'

and i have solved the problem. thank you so much for ur help.

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