Creating ramp signal from -1 to 1

I am trying to create a linear line from y = -1 to 1 from x = 0 to 2000 but my code is creating the linear line from y = 0 to 1. Where am I going wrong with this?

y = 167

t = 60

x = linspace(0, t, y*t);

rampIdx = 2000;
s4 = zeros(1, length(x));
s4(rampIdx+1:end)=1;
s4(1:rampIdx+1) = -1;
s4(1:rampIdx+1) = (1:rampIdx)/rampIdx

Answer 1

[Yongjian Feng]

First there is an error in the last line:

y = 167;
t = 60;
x = linspace(0, t, y*t);
rampIdx = 2000;
s4 = zeros(1, length(x));
s4(rampIdx+1:end)=1;
s4(1:rampIdx) = -1;
z = linspace(-rampIdx, rampIdx, rampIdx);
s4(1:rampIdx) = z/rampIdx;
plot(x, s4)

[Sheung Man Keung]

Thanks but the line still isn't linear going from y = -1 to 1.

[Yongjian Feng]

Modified. Please try again.

[Sheung Man Keung]

Thanks but it is not exactly what I am looking for. I have attached an image of what I am looking for.

[Yongjian Feng]

Your boundary overlapped. Fixed again.