x = [1 3 4 0]
y = [2 1 0 1]
A = [1 0 ; 0 -1]
out = A*[x; y]
fill(x,y,'r',out(1,:),out(2,:),'b')
axis('square','on')
out(1,:)
|
x =
1 3 4 0
y =
2 1 0 1
A =
1 0
0 -1
out =
1 3 4 0
-2 -1 0 -1
ans =
1 3 4 0
2 |-------------------------------------------------|
| + ##XXXXXXX+ ##### + + + |
1.5 |-+ ###XXXXXXXXXXXXXX ##### +-|
| ###XXXXXXXXXXXXXXXXXXXXXX ##### |
| ##XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX ## |
1 |#####XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX#### +-|
| ##########XXXXXXXXXXXXXXXXXXXXXXXXX ## |
0.5 |-+ ##########XXXXXXXXXXXXXXXXX ### +-|
| ##########XXXXXXXXXX ## |
| ##########XX #|
0 |-+ %%%%%%%%%%%%%%|
| %%%%%%%%%% XXXXXXX%% |
-0.5 |-+ %%%%%%%%%% XXXXXXXXXXXXXX%%% +-|
| %%%%%%%%%% XXXXXXXXXXXXXXXXXXXXXX%% |
|%%%%% XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX%% |
-1 |%%%XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX%%%% +-|
| X%%%XXXXXXXXXXXXXXXXXXXXXXXX%%%%% |
-1.5 |-+ XX%%%XXXXXXXXXXXXXXXX%%%%% +-|
| XX%%XXXXXXXXX%%%%% |
| + XX%XXX%%%%% + + + + |
-2 |-------------------------------------------------|
0 0.5 1 1.5 2 2.5 3 3.5 4
x =
1 3 4 0
y =
2 1 0 1
A =
1 0
0 -1
out =
1 3 4 0
-2 -1 0 -1
ans =
1 3 4 0
2 |-------------------------------------------------|
| + ##XXXXXXX+ ##### + + + |
1.5 |-+ ###XXXXXXXXXXXXXX ##### +-|
| ###XXXXXXXXXXXXXXXXXXXXXX ##### |
| ##XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX ## |
1 |#####XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX#### +-|
| ##########XXXXXXXXXXXXXXXXXXXXXXXXX ## |
0.5 |-+ ##########XXXXXXXXXXXXXXXXX ### +-|
| ##########XXXXXXXXXX ## |
| ##########XX #|
0 |-+ %%%%%%%%%%%%%%|
| %%%%%%%%%% XXXXXXX%% |
-0.5 |-+ %%%%%%%%%% XXXXXXXXXXXXXX%%% +-|
| %%%%%%%%%% XXXXXXXXXXXXXXXXXXXXXX%% |
|%%%%% XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX%% |
-1 |%%%XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX%%%% +-|
| X%%%XXXXXXXXXXXXXXXXXXXXXXXX%%%%% |
-1.5 |-+ XX%%%XXXXXXXXXXXXXXXX%%%%% +-|
| XX%%XXXXXXXXX%%%%% |
| + XX%XXX%%%%% + + + + |
-2 |-------------------------------------------------|
0 0.5 1 1.5 2 2.5 3 3.5 4
|