curve

This question already has an answer here: Set R plots x axis to show at y=0 2 answers Suppose I want to plot x^2 . I can use curve() as follows. curve(x^2, -5, 5) However, I would like the axes to go through (0, 0). I could do something as follows: curve(x^2, -5, 5, axes=FALSE) axis(1, pos=0) axis(2, pos=0) abline(h=0) abline(v=0) And I end up getting something like below, which looks OK. But the only gripe I have is that this way of plotting axes makes the actual axes - for example the segment between -4 and 4 of the x-axis - thicker than the segments to the right side and the left side. The

I have a set of points on a plane. They are partitioned into subsets. I want to plot a closed curve around points that belong to the same subset, so that points that belong to a subset will be inside the curve, and those that aren't will be outside. Therefore simple circles, or a convex hull might not work. For a starter, let's say I just want to have a smooth curve around a set of point (without the requirement that it excludes other points) Any ideas how to do that in R? ---added later--- What I'm looking eventually, is something in the spirit of the graphics in here: https://tex

I have a canvas and draw curve with this code: using (Graphics g = Graphics.FromImage(canvas.BackgroundImage)) { g.DrawCurve(pen, points); points is array that I fill that by mouse location points. In the result I see some jagged lines that I didn't draw. You can see them here(in red rectangles): What can i do about this? What you is see is the somewhat unlucky combination of the default for Linejoin , which is Miter and the default for MiterLimit , which is 10. Instead you have a choice of either picking one of the other LineJoin options or reducing the MiterLimit to say less than half the

I think my issue is similar to: Orient object's rotation to a spline point tangent in THREE.JS but I can't access the jsfiddle's properly and I struggled with the second part of the explanation. Basically, I have created this jsfiddle: http://jsfiddle.net/jayfield1979/qGPTT/2/ which demonstrates a simple cube following the path created by a spline using SplineCurve3 . Use standard TrackBall mouse interaction to navigate. Positioning the cube along the path is simple. However I have two questions. First, I am using the spline.getTanget( t ) where t is the position along the path in order to

I'm creating a graph in JavaFX which is supposed to be connected by directed edges. Best would be a bicubic curve. Does anyone know how to do add the arrow heads? The arrow heads should of course be rotated depending on the end of the curve. Here's a simple example without the arrows: import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.paint.Color; import javafx.scene.shape.CubicCurve; import javafx.scene.shape.Rectangle; import javafx.stage.Stage; public class BasicConnection extends Application { public static void main(String[]