我想在MATLAB上用3种颜色绘制线条

Question

我有3个变量，x，y，z。 我想用3种颜色绘制线条，h = 0时为红色，h = 1时为绿色，h = 2时为蓝色。

x = [0 1 2 3 4 5 6 7 8 9 10 11 12 13 14];
y = [0 1 2 1 3 4 7 9 8 6 5 3 2 1 0];
h = [0 0 0 0 0 1 1 1 1 1 2 2 2 2 2];
color = [1 0 0 ; 0 1 0 ; 0 0 1];

Answer 1

试试这个：

x = [0 1 2 3 4 5 6 7 8 9 10 11 12 13 14];
y = [0 1 2 1 3 4 7 9 8 6 5 3 2 1 0];
h = [0 0 0 0 0 1 1 1 1 1 2 2 2 2 2];
color = [1 0 0 ; 0 1 0 ; 0 0 1];


greens = h<1;
reds = h>=1;
blues = h>=2;

greenLine = y;
redLine = y;
blueLine = y;


greenLine(~greens) = NaN;

redLine(~reds) = NaN

blueLine(~blues) = NaN

plot(x,greenLine,'g',x,redLine,'r',x,blueLine,'b');