On Dec 15, 2013, at 4:46 AM, 水静流深 wrote:
t--4:4
y-c(5,7,10,13,15,16,14,12,11)
plot(t,y,type=l)
how can i add a curve y=0.83*t-0.44*t^2 in the graph?
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t--4:4
y-c(5,7,10,13,15,16,14,12,11)
plot(t,y,type=l, ylim=c(-4,16))
curve( 0.83*x-0.44*x^2 ,
t--4:4
y-c(5,7,10,13,15,16,14,12,11)
plot(t,y,type=l)
how can i add a curve y=0.83*t-0.44*t^2 in the graph?
[[alternative HTML version deleted]]
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Hi,
On itself one way of doing this is:
lines(seq(-4,4,0.1),sapply(seq(-4,4,0.1),function(t)0.83*t-0.44*t^2))
The curve does not fit in the scale, however. Are you sure the formula is
correct? Then you have to adapt the scale:
plot.new()
plot.window(xlim=c(-4,4), ylim=c(-10,16))
axis(1)
axis(2)
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