MATLAB isn't working to generate figures

my matlab is not generating any output like its not giving the figure when i write i amshow command or performaning any commands given below ...please help its argent

Answer 1

[Daniel Pollard]

Use hold on and hold off when generating figures. I've not used imshow before, but I'll guess that each time you generate a figure it overwrites the old one. The hold commands stop that.

While I'm here:

https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

https://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

Also, I can't test if my suggestion helps you, because I can't run a screenshot of your code. Copy and paste your code, format it correctly and attach any files you use and someone will be 100x more likely to be able to help.

[hufsa tahseen]

>> A=imread('2.jpg');

>> [m,n]=size(A);

>> for i=1:m

for j=1:n

a=A(i,j);

b=dec2bin(a,8);

c=b(1:4);

d=b(1:2);

e=b(1);

C(i,j)=bin2dec(c);

D(i,j)=bin2dec(d);

E(i,j)=bin2dec(e);

end

end

>> imshow(A);

title('original')

C=C*17;

figure;imshow(uint8(C));

D=D*85;

figure;imshow(uint8(D));

title('2-bit');

E=E*255;

figure;imshow(uint8));

title('1bit');

[hufsa tahseen]

this is the code i am trying but when i write my matlab don't respond and don't show any figure and outputs

[Daniel Pollard]

Again, I can't run it because I don't have "2.jpg". Did you try using the hold commands?

[hufsa tahseen]

can you please guide me how can i use hold commands i have no idea about it

[Daniel Pollard]

When you create a figure, you can tell Matlab to keep working on that environment until you say otherwise. This is particularly useful if you want to plot multiple things on the same axis, or generate multiple plots without overwriting any others. For example, for your code, I would write

figure; hold on
imshow(A);
title('original')
hold off

C=C*17;
figure; hold on
imshow(uint8(C));
hold off

D=D*85;
figure; hold on
imshow(uint8(D));
title('2-bit');
hold off

E=E*255;
figure; hold on
imshow(uint8));
title('1bit');
hold off

Let me know if that works.

Edit In the future, it's very helpful to use the matlab documention if you're unsure. Googling matlab hold returns the documentation as the first result, or you can type help hold or doc hold into your Matlab command window (even without an internet connection) to see the documentation.