How to plot unit square using single matrix, to apply transformation matrices onto it.

Question

Bruck Assefa 2019-10-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/485779-how-to-plot-unit-square-using-single-matrix-to-apply-transformation-matrices-onto-it

回答： Walter Roberson 2019-10-17

I am attempting to make a live script that demonstrates the effect of transformation matrices by showing its affect on the plotted unit square. Is it possible to plot a unit square using just a single matrix, such that transformation matrices can be applied to it and reflected in the plot? I am able to plot a unit square using x and y row vectors but not together. I am unsure if plot() is even the best way to go about this, any help would be appreciate it.

A = [0 0 1 1 0; 
    0 1 1 0 0]
plot(A)
x = [0 0 1 1 0] 
y = [0 1 1 0 0]
plot(x,y)

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2019-10-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/485779-how-to-plot-unit-square-using-single-matrix-to-apply-transformation-matrices-onto-it#answer_396712

Is it possible to plot a unit square using just a single matrix, such that transformation matrices can be applied to it and reflected in the plot?

All of the plotting routines that I can think of in MATLAB want separated X and Y.

There are two ways to proceed:

Put the separated X Y together in a matrix, apply the transform matrix, pull apart the results and plot. This will permit you to demonstrate the transformed coordinates to the user.
create a hgtransform group. plot() the separated X Y parented to the hgtransform group. Then each time you can apply a transform matrix by change the Matrix property of the hgtransform. This will easily show the results of the transform matrix, but will not as easily permit you to display the transformed coordinates.