# Function "simm.mou" in the package "adehabitatLT": how to modify distance between locations ?

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## Function "simm.mou" in the package "adehabitatLT": how to modify distance between locations ?

 Marine Regis a partag� un fichier OneDrive avec vous. Pour l�afficher, cliquez sur le lien ci-dessous. [https://r1.res.office365.com/owa/prem/images/dc-generic_20.png] Picture1.tif Hello, I would like to simulate a bivariate Ornstein-Uhlenbeck process in order to represent animal movement in a landscape raster. To do this, I am testing the function �simm.mou� in the package �adehabitatLT�. From this function, how can I simulate a bivariate Ornstein-Uhlenbeck process that generates centroid points with distance between two points equal to 1 or sqrt(2) within the raster extent ? Here is the code that generates the raster (or landscape) and draws the start point (in red) set.seed(1) r <- squareRaster(extent(0, 10, 0, 10), cells=100) res(r) <- 1 vals <- sample(1:10, 100, replace = TRUE) r[] <- vals plot(r) points(5.5, 5.5, pch = 16, col = "red") Here is the code that simulates a bivariate Ornstein-Uhlenbeck process using the function �simm.mou� v <- simm.mou(1:50, x0=c(5.5, 5.5), b=c(3.5,3.5)) x0 contains the coordinates of the start point and b contains the coordinates of the attraction point. I attached an image showing animal movement from the start point (5.5, 5.5) to the attraction point (3.5, 3.5). The attraction point is represented in blue. Any help is welcome. Thanks in advance. Best, Marine         [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list [hidden email] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
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## Re: Function "simm.mou" in the package "adehabitatLT": how to modify distance between locations ?

 Sorry, the link seems to be wrong. Here is the link: https://1drv.ms/i/s!ArMv0o38inhEbWv5SSHRYu0lgRoMarine [https://ts6guw-dm2305.files.1drv.com/y4m2sjMObmyp-pH0Ss-IaT9koUupvLVJSHqEUUGiPjqlxLVrRH3KYSwb1vaO6B5ZZelGqdrfddHsvkl3aZ0lFIKYq1Lx7a87kSaSVeoMfJhElV8K6Vy20mvHkXLjMOm7Bm3UeX_nXQZlNdx0HNr1MEDVfw-kn5RENmxOxl5A9stm8E] [https://ts6guw-dm2305.files.1drv.com/y4m2sjMObmyp-pH0Ss-IaT9koUupvLVJSHqEUUGiPjqlxLVrRH3KYSwb1vaO6B5ZZelGqdrfddHsvkl3aZ0lFIKYq1Lx7a87kSaSVeoMfJhElV8K6Vy20mvHkXLjMOm7Bm3UeX_nXQZlNdx0HNr1MEDVfw-kn5RENmxOxl5A9stm8E] ________________________________ De : R-sig-Geo <[hidden email]> de la part de Marine Regis <[hidden email]> Envoyé : jeudi 26 octobre 2017 00:13 À : [hidden email] Objet : [R-sig-Geo] Function "simm.mou" in the package "adehabitatLT": how to modify distance between locations ? Marine Regis a partag� un fichier OneDrive avec vous. Pour l�afficher, cliquez sur le lien ci-dessous. [https://r1.res.office365.com/owa/prem/images/dc-generic_20.png] Picture1.tif Hello, I would like to simulate a bivariate Ornstein-Uhlenbeck process in order to represent animal movement in a landscape raster. To do this, I am testing the function �simm.mou� in the package �adehabitatLT�. From this function, how can I simulate a bivariate Ornstein-Uhlenbeck process that generates centroid points with distance between two points equal to 1 or sqrt(2) within the raster extent ? Here is the code that generates the raster (or landscape) and draws the start point (in red) set.seed(1) r <- squareRaster(extent(0, 10, 0, 10), cells=100) res(r) <- 1 vals <- sample(1:10, 100, replace = TRUE) r[] <- vals plot(r) points(5.5, 5.5, pch = 16, col = "red") Here is the code that simulates a bivariate Ornstein-Uhlenbeck process using the function �simm.mou� v <- simm.mou(1:50, x0=c(5.5, 5.5), b=c(3.5,3.5)) x0 contains the coordinates of the start point and b contains the coordinates of the attraction point. I attached an image showing animal movement from the start point (5.5, 5.5) to the attraction point (3.5, 3.5). The attraction point is represented in blue. Any help is welcome. Thanks in advance. Best, Marine         [[alternative HTML version deleted]]         [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list [hidden email] https://stat.ethz.ch/mailman/listinfo/r-sig-geo