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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,68 +1,100 @@ | ||
| "angles" <- | ||
| function (x, id = levels(x$id), burst = levels(x$burst), | ||
| date = NULL, slsp = c("remove", "missing")) | ||
| { | ||
| "angles" <- function (x, id = levels(x$id), burst = levels(x$burst), | ||
| date = NULL, slsp = c("remove", "missing")) | ||
| { | ||
| ## The function is deprecated | ||
| .Deprecated("as.ltraj") | ||
|
|
||
| ## Verifications | ||
| if (!inherits(x, "traj")) | ||
| stop("x should be of class \"traj\"") | ||
| stop("x should be of class \"traj\"") | ||
| slsp <- match.arg(slsp) | ||
|
|
||
|
|
||
| ## prepangles is used to remove successive relocations | ||
| ## located at the same place | ||
| prepangles <- function(x) | ||
| { | ||
| { | ||
| ## Verifications | ||
| if (!inherits(x, "traj")) | ||
| stop("x should be of class \"traj\"") | ||
| stop("x should be of class \"traj\"") | ||
|
|
||
| ## split per burst | ||
| li <- split(x, x$burst) | ||
|
|
||
| ## keeps only the successive relocations at different places | ||
| foo <- function(y) { | ||
| oo <- unlist(lapply(2:nrow(y), | ||
| function(i) (!all(y[i,c("x","y")]==y[i-1,c("x","y")])))) | ||
| oo <- c(TRUE,oo) | ||
| y <- y[oo,] | ||
| oo <- unlist(lapply(2:nrow(y), | ||
| function(i) | ||
| (!all(y[i,c("x","y")]==y[i-1,c("x","y")])))) | ||
| oo <- c(TRUE,oo) | ||
| y <- y[oo,] | ||
| } | ||
|
|
||
| ## output | ||
| res <- do.call("rbind", lapply(li, foo)) | ||
| return(res) | ||
| } | ||
| } | ||
|
|
||
| ## gets the selected bursts | ||
| x <- getburst(x, burst = burst, id = id, date = date) | ||
|
|
||
| ## if the angles are to be removed when successive relocations are | ||
| ## on the same place | ||
| if (slsp=="remove") | ||
| x <- prepangles(x) | ||
| x <- prepangles(x) | ||
|
|
||
| ## split per burst | ||
| li <- split(x, x$burst) | ||
|
|
||
| ## To compute the angles | ||
| foo <- function(x) { | ||
| xy<-as.matrix(x[,c("x","y")]) | ||
| ang<-1:(nrow(xy)-2) | ||
| for (i in 2:(nrow(xy)-1)) { | ||
| na <- 0 | ||
| ref1<-xy[i-1,] | ||
| xyb1<-t(t(xy)-ref1) | ||
| ang1<--atan2(xyb1[i,2],xyb1[i,1]) | ||
|
|
||
| ## calcul de la position de x2 et x3 rotaté | ||
| x2<-c(sqrt(sum(xyb1[i,]^2)), 0) | ||
| if (sum(abs(x2)) < 1e-7) | ||
| na<-1 | ||
| x3b<-x3<-xyb1[i+1,] | ||
| x3b[1]= cos(ang1)*x3[1] - sin(ang1)*x3[2] | ||
| x3b[2]= sin(ang1)*x3[1] + cos(ang1)*x3[2] | ||
| x3<-x3b | ||
|
|
||
| ## et recalcul de l'angle | ||
| x3<-x3-x2 | ||
| if (sum(abs(x3)) < 1e-7) | ||
| na<-1 | ||
| ang[i-1]<-atan2(x3[2],x3[1]) | ||
| if (na > 0.5) | ||
| if (slsp == "missing") | ||
| ang[i - 1] <- NA | ||
| } | ||
| so<-data.frame(id=x$id[-c(1,nrow(xy))], | ||
| x=xy[-c(1,nrow(xy)),1], | ||
| y=xy[-c(1,nrow(xy)),2], | ||
| date=x$date[-c(1,nrow(xy))], | ||
| burst=x$burst[-c(1,nrow(xy))], | ||
| angles=ang) | ||
|
|
||
| ## gets the coordinates | ||
| xy<-as.matrix(x[,c("x","y")]) | ||
| ang<-1:(nrow(xy)-2) | ||
|
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||
|
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||
| for (i in 2:(nrow(xy)-1)) { | ||
|
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||
| ## current relocation, with the previous one | ||
| na <- 0 | ||
| ref1<-xy[i-1,] | ||
|
|
||
| ## the origin of the space is placed on the previous reloc | ||
| xyb1<-t(t(xy)-ref1) | ||
| ang1<--atan2(xyb1[i,2],xyb1[i,1]) | ||
|
|
||
| ## Position of rotated x2 and x3 | ||
| x2<-c(sqrt(sum(xyb1[i,]^2)), 0) | ||
| if (sum(abs(x2)) < 1e-7) | ||
| na<-1 | ||
| x3b<-x3<-xyb1[i+1,] | ||
| x3b[1]= cos(ang1)*x3[1] - sin(ang1)*x3[2] | ||
| x3b[2]= sin(ang1)*x3[1] + cos(ang1)*x3[2] | ||
| x3<-x3b | ||
|
|
||
| ## Computation of the angles | ||
| x3<-x3-x2 | ||
| if (sum(abs(x3)) < 1e-7) | ||
| na<-1 | ||
| ang[i-1]<-atan2(x3[2],x3[1]) | ||
| if (na > 0.5) | ||
| if (slsp == "missing") | ||
| ang[i - 1] <- NA | ||
| } | ||
|
|
||
| ## output | ||
| so<-data.frame(id=x$id[-c(1,nrow(xy))], | ||
| x=xy[-c(1,nrow(xy)),1], | ||
| y=xy[-c(1,nrow(xy)),2], | ||
| date=x$date[-c(1,nrow(xy))], | ||
| burst=x$burst[-c(1,nrow(xy))], | ||
| angles=ang) | ||
| } | ||
|
|
||
| ## output | ||
| lo <- do.call("rbind", lapply(li, foo)) | ||
| row.names(lo) <- 1:nrow(lo) | ||
| return(lo) | ||
| } | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,17 +1,23 @@ | ||
| "ararea" <- | ||
| function(x) | ||
| "ararea" <- function(x) | ||
| { | ||
| if (!inherits(x, "area")) | ||
| stop("x should be of class \"area\"") | ||
| if (!require(gpclib)) | ||
| stop("package gpclib needed for this function") | ||
| uu <- split(x[,2:3], x[,1]) | ||
| foo <- function(y) { | ||
| class(y) <- "data.frame" | ||
| u <- area.poly(as(y, "gpc.poly")) | ||
| } | ||
| res <- unlist(lapply(uu, foo)) | ||
| names(res) <- names(uu) | ||
| return(res) | ||
| ## Verifications | ||
| if (!inherits(x, "area")) | ||
| stop("x should be of class \"area\"") | ||
|
|
||
| ## package gpclib needed | ||
| if (!require(gpclib)) | ||
| stop("package gpclib needed for this function") | ||
|
|
||
| ## Computes the area of each polygon | ||
| uu <- split(x[,2:3], x[,1]) | ||
| foo <- function(y) { | ||
| class(y) <- "data.frame" | ||
| u <- area.poly(as(y, "gpc.poly")) | ||
| } | ||
|
|
||
| ## Output | ||
| res <- unlist(lapply(uu, foo)) | ||
| names(res) <- names(uu) | ||
| return(res) | ||
| } | ||
|
|
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