adding points to a surface reverses x and y axis
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Descripción
In trying to replicate some 3D marginal plots of a model, I notice that plot_ly swaps axes when adding points.
When using persp, I get a figure which I consider correct. meshout changes with size, but not distance.

but when mapping size and distance to x and y respectively, axes appear to be switched.

When manually switching them, plot appears fine.

Is this something you guys can look into? Below is a fully working example.
library(plotly)
library(ggplot2)
library(reshape2)
library(rgl)
N <- 50
B0 <- 1.2
B1 <- 1.5
B2 <- -0.5
set.seed(357)
count <- rpois(N, 10)
distance <- seq(-0.5, 0.5,,length(count))
size <- (log(count) - B0 - B2 * distance) / B1
xy <- data.frame(count, size, distance)
mdl <- glm(count ~ size * distance, family = poisson(link = log), data = xy)
summary(mdl)
ggplot(xy, aes(x = size, y = count, color = distance)) +
geom_point()
npts <- 50
s.size <- seq(from = min(xy$size), to = max(xy$size), length.out = npts)
s.dist <- seq(from = min(xy$distance), to = max(xy$distance), length.out = npts)
mesh <- expand.grid(
size = s.size,
distance = s.dist
)
mesh$count <- predict(mdl, newdata = mesh, type = "response")
head(mesh)
meshout <- as.matrix(
dcast(mesh, formula = size ~ distance, value.var = "count")[, -1]
)
pmat <- persp(x = s.size, y = s.dist, z = meshout, # size and distance mapped OK
theta = 0, phi = 30,
col = "grey90", border = "grey50")
points(trans3d(x = xy$size, y = xy$dist, z = xy$count, pmat = pmat))
plot3d(x = xy$size, y = xy$distance, z = xy$count) # check, distance and size are plotted correctly
# https://stackoverflow.com/questions/5468280/scale-a-series-between-two-points#comment49916403_5468527
range02 <- function(x, newMin, newMax){ (x - min(x))/(max(x)-min(x)) * (newMax - newMin) + newMin }
xy$scaled_size <- range02(xy$size, newMin = 0, newMax = 50)
xy$scaled_distance <- range02(xy$distance, newMin = 0, newMax = 50)
# size and distance swapped
plot_ly(z = ~ meshout) %>%
add_surface(name = "Incorrect mapping of x and y") %>%
add_markers(data = xy, x = ~scaled_size, y = ~scaled_distance, z = ~count,
marker = list(size = 5, color = "black"), name = "Incorrect mapping of x and y")
# when switching mapping of x and y, plots fine
plot_ly(z = ~ meshout) %>%
add_surface(name = "Incorrect mapping of x and y") %>%
add_markers(data = xy, x = ~scaled_distance, y = ~scaled_size, z = ~count,
marker = list(size = 5, color = "black"), name = "Incorrect mapping of x and y")
Guía de contribución
Primeros pasos
- Lee el issue completo y luego la guía de contribución del proyecto.
- Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
- Haz un fork del repositorio y trabaja en una rama.
- Abre un pull request que haga referencia al número del issue.
Línea de trabajo
Comienza con el ejemplo reproducible en R usando plot_ly(), add_surface() y add_markers(), y compara su mapeo de ejes con persp() y plot3d(). Traza cómo se establecen las coordenadas de la superficie con respecto a los valores x e y de los marcadores; se considera terminado cuando la superficie y los puntos añadidos usan los mismos ejes de tamaño y distancia sin intercambiarlos manualmente.
Escrito por el modelo de indexación a partir del texto del issue.
Evaluación
- Stack tecnológico
- r
- Área
- data-visualization
- Tipo de issue
- Error
- Dificultad
- 4/5
- Tiempo estimado
- 3-5 días
- Estado de actividad
- Estancado
- Claridad
- Bastante claro
- Aptitud para principiantes
- 35/100