Rotating a plot about a center of origin

Question

Ammar Babikir 2017-9-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/354815-rotating-a-plot-about-a-center-of-origin

回答： Walter Roberson 2017-9-1

在 MATLAB Online 中打开

Hi everybody,

I'm trying to rotate an entire plot that I have about a specific origin.

Here is my code

x = 50; 
y = 50;
figure     
plot( [0:100; 0:100] , [0:100; 0:100] , 'k' )           
hold on                                       
      fill([0 1 1 0]+(x+1) , [0 0 1 1]+(y+3), 'blue')          
      fill([0 1 1 0]+(x+2) , [0 0 1 1]+(y+3), 'blue') 
      fill([0 1 1 0]+(x+1) , [0 0 1 1]+(50-2), 'blue')          
      fill([0 1 1 0]+(x+2) , [0 0 1 1]+(50-2), 'blue')         
      fill([0 1 1 0]+ (x+3) , [0 0 1 1]+(y), 'blue')          
      fill([0 1 1 0]+ (x+3) , [0 0 1 1]+ (y+1), 'blue')          
      fill([0 1 1 0]+(x) , [0 0 1 1]+(y), 'red') 
      fill([0 1 1 0]+(x+1) , [0 0 1 1]+(y), 'red') 
      fill([0 1 1 0]+(x) , [0 0 1 1]+(y+1), 'red') 
      fill([0 1 1 0]+(x+1) , [0 0 1 1]+(y+1), 'red') 
      fill([0 1 1 0]+(x-3) , [0 0 1 1]+(y+3), 'red') 
      fill([0 1 1 0]+(x-2) , [0 0 1 1]+(y+3), 'red') 
      fill([0 1 1 0]+(x-1) , [0 0 1 1]+(y+3), 'red') 
          fill([0 1 1 0]+(x-3) , [0 0 1 1]+(y-2), 'red') 
          fill([0 1 1 0]+(x-2) , [0 0 1 1]+(y-2), 'red') 
          fill([0 1 1 0]+(x-1) , [0 0 1 1]+(y-2), 'red') 
          fill([0 1 1 0]+(x-3) , [0 0 1 1]+(y+3), 'red') 
          fill([0 1 1 0]+(x-2) , [0 0 1 1]+(y+3), 'red') 
          fill([0 1 1 0]+(x-1) , [0 0 1 1]+(y+3), 'red') 
           fill([0 1 1 0]+(x-1) , [0 0 1 1]+(y), 'black') 
          fill([0 1 1 0]+(x-2) , [0 0 1 1]+(y), 'black') 
           fill([0 1 1 0]+(x-3) , [0 0 1 1]+(y), 'black') 
          fill([0 1 1 0]+(x+2) , [0 0 1 1]+(y), 'black') 
          fill([0 1 1 0]+(x-1) , [0 0 1 1]+(y+1), 'black') 
          fill([0 1 1 0]+(x-2) , [0 0 1 1]+(y+1), 'black')
          fill([0 1 1 0]+(x-3) , [0 0 1 1]+(y+1), 'black') 
          fill([0 1 1 0]+(x+2) , [0 0 1 1]+(y+1), 'black')
          fill([0 1 1 0]+(x+2) , [0 0 1 1]+(y+1), 'black') 
          fill([0 1 1 0]+(x) , [0 0 1 1]+(y-1), 'black') 
          fill([0 1 1 0]+(x+1) , [0 0 1 1]+(y+2), 'black') 
          fill([0 1 1 0]+(x+2) , [0 0 1 1]+(y+2), 'black') 
          fill([0 1 1 0]+(x) , [0 0 1 1]+(y+2), 'black') 
          fill([0 1 1 0]+(x+1) , [0 0 1 1]+(y-1), 'black') 
          fill([0 1 1 0]+(x+2) , [0 0 1 1]+(y-1), 'black') 
          fill([0 1 1 0]+(x-1) , [0 0 1 1]+(y+2), 'black') 
          fill([0 1 1 0]+(x-2) , [0 0 1 1]+(y+2), 'black') 
          fill([0 1 1 0]+(x-3) , [0 0 1 1]+(y+2), 'black') 
          fill([0 1 1 0]+(x-1) , [0 0 1 1]+(y-1), 'black') 
          fill([0 1 1 0]+(x-2) , [0 0 1 1]+(y-1), 'black') 
          fill([0 1 1 0]+(x-3) , [0 0 1 1]+(y-1), 'black') 
hold off                                             
hax = gca;                                          
hax.XTick = 0:100;                                  
hax.YTick = 0:100;                                  
hax.XTickLabel = [];                               
hax.YTickLabel = [];                              
grid                                               
axis square

Here is the plot that it outputs. I took a screenshot and labeled exactly where my center of origin is with its coordinates

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Answer 1

Walter Roberson 2017-9-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/354815-rotating-a-plot-about-a-center-of-origin#answer_279917

If the rotation is for visual purposes, you could consider parenting to a hgtransform group and applying transforms to the group. Note that this would end up rotating the lines as well.