Re: [R] Plot lines whose angle and length depict vector quantities
On 27/09/2013 21:01, Bert Gunter wrote: On Fri, Sep 27, 2013 at 12:44 PM, Sarah Goslee sarah.gos...@gmail.com wrote: It's a straightforward trigonometry problem, isn't it? Indeed! ( (r,theta) to (x,y) coordinates ) . So I wonder if this is a homework problem. If so, the OP should note that we try not to do homework here. So that would make it unanimous that everyone here is trying not to do homework. Pat Cheers, Bert On Fri, Sep 27, 2013 at 2:56 PM, Conor Ryan miol...@gmail.com wrote: I am trying to plot points on a map for each ship locations (lat/long), where each point is a line whose angle (degrees) denotes ships heading and whose line length denotes it's speed. Unfortunately arrows(); p.arrows (sfsmisc) and ms.arrows (TeachingDemos) require start and end coordinates but I only have a single coordinate and an angle to work with. Can you suggest any other packages or commands that might allow me to plot this? Alternatively, can anyone suggest a method of making 'angle' a vector quantity when using the arrows function? Any advice would be much appreciated! -- Sarah Goslee http://www.functionaldiversity.org __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Patrick Burns pbu...@pburns.seanet.com twitter: @burnsstat @portfolioprobe http://www.portfolioprobe.com/blog http://www.burns-stat.com (home of: 'Impatient R' 'The R Inferno' 'Tao Te Programming') __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Plot lines whose angle and length depict vector quantities
Hi Jim, vectorField worked a treat - thanks! On 28 September 2013 01:57, Jim Lemon j...@bitwrit.com.au wrote: On 09/28/2013 04:56 AM, Conor Ryan wrote: I am trying to plot points on a map for each ship locations (lat/long), where each point is a line whose angle (degrees) denotes ships heading and whose line length denotes it's speed. Unfortunately arrows(); p.arrows (sfsmisc) and ms.arrows (TeachingDemos) require start and end coordinates but I only have a single coordinate and an angle to work with. Can you suggest any other packages or commands that might allow me to plot this? Alternatively, can anyone suggest a method of making 'angle' a vector quantity when using the arrows function? Any advice would be much appreciated! Hi Conor, Try the vector.field function (plotrix). Jim [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Plot lines whose angle and length depict vector quantities
Certainly not a homework question. Elementary questions do not necessarily indicate that one is a student! Always learning... Dr Conor Ryan On 28 September 2013 11:39, Patrick Burns pbu...@pburns.seanet.com wrote: On 27/09/2013 21:01, Bert Gunter wrote: On Fri, Sep 27, 2013 at 12:44 PM, Sarah Goslee sarah.gos...@gmail.com wrote: It's a straightforward trigonometry problem, isn't it? Indeed! ( (r,theta) to (x,y) coordinates ) . So I wonder if this is a homework problem. If so, the OP should note that we try not to do homework here. So that would make it unanimous that everyone here is trying not to do homework. Pat Cheers, Bert On Fri, Sep 27, 2013 at 2:56 PM, Conor Ryan miol...@gmail.com wrote: I am trying to plot points on a map for each ship locations (lat/long), where each point is a line whose angle (degrees) denotes ships heading and whose line length denotes it's speed. Unfortunately arrows(); p.arrows (sfsmisc) and ms.arrows (TeachingDemos) require start and end coordinates but I only have a single coordinate and an angle to work with. Can you suggest any other packages or commands that might allow me to plot this? Alternatively, can anyone suggest a method of making 'angle' a vector quantity when using the arrows function? Any advice would be much appreciated! -- Sarah Goslee http://www.**functionaldiversity.orghttp://www.functionaldiversity.org __** R-help@r-project.org mailing list https://stat.ethz.ch/mailman/**listinfo/r-helphttps://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/** posting-guide.html http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Patrick Burns pbu...@pburns.seanet.com twitter: @burnsstat @portfolioprobe http://www.portfolioprobe.com/**blog http://www.portfolioprobe.com/blog http://www.burns-stat.com (home of: 'Impatient R' 'The R Inferno' 'Tao Te Programming') __** R-help@r-project.org mailing list https://stat.ethz.ch/mailman/**listinfo/r-helphttps://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/** posting-guide.html http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Plot lines whose angle and length depict vector quantities
Hi Greg, thanks for your help. I found vectorFields, as suggested by Jim Lemon, in plotrix to be slightly easier (given my relatively basic R language knowledge!). Kind Regards, Conor On 27 September 2013 22:07, Greg Snow 538...@gmail.com wrote: The ms.arrows along with my.symbols in the TeachingDemos package does not require start and end points, it takes a single point along with the angle and length (and the length can be a single constant to have all the arrows the same length, or a variable to have different lengths). You can also set an adjustment parameter to decide if the arrows should be centered on the point, start at the point, or end at the point. The ms.arrows function was designed for exactly what you describe. On Fri, Sep 27, 2013 at 12:56 PM, Conor Ryan miol...@gmail.com wrote: I am trying to plot points on a map for each ship locations (lat/long), where each point is a line whose angle (degrees) denotes ships heading and whose line length denotes it's speed. Unfortunately arrows(); p.arrows (sfsmisc) and ms.arrows (TeachingDemos) require start and end coordinates but I only have a single coordinate and an angle to work with. Can you suggest any other packages or commands that might allow me to plot this? Alternatively, can anyone suggest a method of making 'angle' a vector quantity when using the arrows function? Any advice would be much appreciated! [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.com [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Plot lines whose angle and length depict vector quantities
I am trying to plot points on a map for each ship locations (lat/long), where each point is a line whose angle (degrees) denotes ships heading and whose line length denotes it's speed. Unfortunately arrows(); p.arrows (sfsmisc) and ms.arrows (TeachingDemos) require start and end coordinates but I only have a single coordinate and an angle to work with. Can you suggest any other packages or commands that might allow me to plot this? Alternatively, can anyone suggest a method of making 'angle' a vector quantity when using the arrows function? Any advice would be much appreciated! [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Plot lines whose angle and length depict vector quantities
It's a straightforward trigonometry problem, isn't it? On Fri, Sep 27, 2013 at 2:56 PM, Conor Ryan miol...@gmail.com wrote: I am trying to plot points on a map for each ship locations (lat/long), where each point is a line whose angle (degrees) denotes ships heading and whose line length denotes it's speed. Unfortunately arrows(); p.arrows (sfsmisc) and ms.arrows (TeachingDemos) require start and end coordinates but I only have a single coordinate and an angle to work with. Can you suggest any other packages or commands that might allow me to plot this? Alternatively, can anyone suggest a method of making 'angle' a vector quantity when using the arrows function? Any advice would be much appreciated! -- Sarah Goslee http://www.functionaldiversity.org __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Plot lines whose angle and length depict vector quantities
On Fri, Sep 27, 2013 at 12:44 PM, Sarah Goslee sarah.gos...@gmail.com wrote: It's a straightforward trigonometry problem, isn't it? Indeed! ( (r,theta) to (x,y) coordinates ) . So I wonder if this is a homework problem. If so, the OP should note that we try not to do homework here. Cheers, Bert On Fri, Sep 27, 2013 at 2:56 PM, Conor Ryan miol...@gmail.com wrote: I am trying to plot points on a map for each ship locations (lat/long), where each point is a line whose angle (degrees) denotes ships heading and whose line length denotes it's speed. Unfortunately arrows(); p.arrows (sfsmisc) and ms.arrows (TeachingDemos) require start and end coordinates but I only have a single coordinate and an angle to work with. Can you suggest any other packages or commands that might allow me to plot this? Alternatively, can anyone suggest a method of making 'angle' a vector quantity when using the arrows function? Any advice would be much appreciated! -- Sarah Goslee http://www.functionaldiversity.org __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Plot lines whose angle and length depict vector quantities
The ms.arrows along with my.symbols in the TeachingDemos package does not require start and end points, it takes a single point along with the angle and length (and the length can be a single constant to have all the arrows the same length, or a variable to have different lengths). You can also set an adjustment parameter to decide if the arrows should be centered on the point, start at the point, or end at the point. The ms.arrows function was designed for exactly what you describe. On Fri, Sep 27, 2013 at 12:56 PM, Conor Ryan miol...@gmail.com wrote: I am trying to plot points on a map for each ship locations (lat/long), where each point is a line whose angle (degrees) denotes ships heading and whose line length denotes it's speed. Unfortunately arrows(); p.arrows (sfsmisc) and ms.arrows (TeachingDemos) require start and end coordinates but I only have a single coordinate and an angle to work with. Can you suggest any other packages or commands that might allow me to plot this? Alternatively, can anyone suggest a method of making 'angle' a vector quantity when using the arrows function? Any advice would be much appreciated! [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.com [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Plot lines whose angle and length depict vector quantities
On 09/28/2013 04:56 AM, Conor Ryan wrote: I am trying to plot points on a map for each ship locations (lat/long), where each point is a line whose angle (degrees) denotes ships heading and whose line length denotes it's speed. Unfortunately arrows(); p.arrows (sfsmisc) and ms.arrows (TeachingDemos) require start and end coordinates but I only have a single coordinate and an angle to work with. Can you suggest any other packages or commands that might allow me to plot this? Alternatively, can anyone suggest a method of making 'angle' a vector quantity when using the arrows function? Any advice would be much appreciated! Hi Conor, Try the vector.field function (plotrix). Jim __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
