plotting a 2nd order matlab

Hello everybody,

I'm trying to plot a 2nd order polynomial. I have a vector X and the y values are determined by the equation

 Y= -0.01291*X.^2-0.1971*X+47.39;

When I try to plot using

plot(X,Y)

I get this plot

However I want a single line and not a filled form. Anyone know how to this?

Joaquim

[Wine]

Hi,

how have you defined your X-vector? Because the look of your plot depends on this X-vector. If you use for example

X = 0:1:100;

as vector definition, the plot will be a line.

Cheers Wine