> > Message: 1 > Date: Fri, 12 Apr 2013 13:55:32 +0400 > From: Bakhtiyor Zokhidov <bakhtiyor_zokhi...@mail.ru> > Subject: [Matplotlib-users] Impossible to draw a direction of arrows > in Matplotlib??? > > Hi, > I have encountered some problem while I was drawing a direction of > arrow. I have point (x,y) coordinates and angle of them. What I want to > do is that to draw arrow according to the given angle (just to show the > point direction as an arrow in each point coordinate). Here, we should > assume coordinates of '+x', '+y', '-x ', '-y' are 90, 0, 270, 180 > degrees, respectively.? > I am a bit unfamiliar with Python drawing tools. I am still not sure to > draw directional point (arrow based on angle) whether I use pylab or > some other modules or.. still not sure at all. I put the following codes > as a sample to give better description:
I see the potential for some confusion over the direction of arrows on a plot here. In standard trigonometry angles of 0, 90, 180, 270 degrees lie along '+x' (1, 0), '+y' (0, 1), '-x' (-1, 0) and '-y' (0, -1). Totally different to what you want. However, this is obviously different to the compass rose. ________________ Dr Andrew Nelson andyf...@gmail.com _________________ ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
