I am trying to plot a contour ellipse

ContourPlot[2.8034950798347694*10^8 + 346.6795282575007 x^2 –

929387.1591151787 y + 770.3723456790123 y^2 +

x (-623273.1898861742 + 1032.7522877535007 y) == 50000, {x, -600,

600}, {y, 0, 650}]

But the ellipse appears to be “broken”, is there any remedy for this?

On doing the same thing on WolframAlpha I got a nice smooth ellipse though.

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1 Answer

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ContourPlot[

2.8034950798347694*10^8 + 346.6795282575007 x^2 –

929387.1591151787 y + 770.3723456790123 y^2 +

x (-623273.1898861742 + 1032.7522877535007 y) == 50000, {x, -600,

600}, {y, 0, 650}, PlotPoints -> 50]

Don’t forget the PlotPoints.