Matlab/Octave

  

 

 

 

Short Tips

 

Followings are list of the short tips that may be useful for you.

 

 

 

Change the size of Figure Window

 

    set(gcf, 'Position', [startX startY width height])

 

Example 01 >

 

Ex 1 >  This has been tested in Matlab only (not in Octave)

    t = 0:0.1:2*pi;

    plot(t,sin(t));

    xlim([min(t) max(t)]);

    set(gcf, 'Position', [100 100 400 200]);

Output

 

 

 

Printing Math Expression

 

 

Example 01 >

 

Ex 1 >  This has been tested in Matlab only (not in Octave)

    t=0:2*pi/40:6*pi;

    a = 0.2;

    b = 1.0;

    f = exp((a+b*j)*t);

     

    plot(real(f),imag(f));

    xlabel(strcat('Re[ -e^{a+b j},a=',num2str(a),' b=',num2str(b),']'));

    ylabel(strcat('Im[ -e^{a+b j},a=',num2str(a),' b=',num2str(b),']'));

Output

 

 

 

Deleting All Text in Graph

 

    t = findall(gcf,'type','text');

    delete(t);

 

 

 

Changing Background Color in Graph

 

    set(gcf,'color','w');

 

 

 

Flatten 2D Matrix to 1D Vector

 

    matA = reshape(matA ,[] ,1) % Flatten to a Column Vector

    matA = reshape(matA ,1, []) % Flatten to a Row Vector

     

 

 

 

Magnifying Image Display

 

    imshow(img,'InitialMagnification','fit');