Hello :-) I am trying to run the next script, it generates "random
areas" inside a map of the american continent,
and then plot it, it´s suppose that every frame gives you the evolution
of the program but at some point it stops
with the weirdest of the errors I´ve ever seen in R, I don´t even have a
line like that :-|
Error in if (random_matrix[x_list[random_sq] - 1, y_list[random_sq]] == :
missing value where TRUE/FALSE needed
the script is this:
# ______________
# ----- Define a function for
plotting a matrix ----- #
myImagePlot <- function(x, ...){
min <- min(x)
max <- max(x)
yLabels <- rownames(x)
xLabels <- colnames(x)
title <-c()
# check for additional function
arguments
if( length(list(...)) ){
Lst <- list(...)
if( !is.null(Lst$zlim) ){
min <- Lst$zlim[1]
max <- Lst$zlim[2]
}
if( !is.null(Lst$yLabels) ){
yLabels <- c(Lst$yLabels)
}
if( !is.null(Lst$xLabels) ){
xLabels <- c(Lst$xLabels)
}
if( !is.null(Lst$title) ){
title <- Lst$title
}
}
# check for null values
if( is.null(xLabels) ){
xLabels <- c(1:ncol(x))
}
if( is.null(yLabels) ){
yLabels <- c(1:nrow(x))
}
layout(matrix(data=c(1,2), nrow=1, ncol=2), widths=c(4,1), heights=c(1,1))
# Red and green range from 0 to
1 while Blue ranges from 1 to 0
ColorRamp <- rgb( seq(0,1,length=256), # Red
seq(0,1,length=256), # Green
seq(1,0,length=256)) # Blue
ColorLevels <- seq(min, max, length=length(ColorRamp))
# Reverse Y axis
reverse <- nrow(x) : 1
yLabels <- yLabels[reverse]
x <- x[reverse,]
# Data Map
par(mar = c(3,5,2.5,2))
image(1:length(xLabels), 1:length(yLabels), t(x), col=ColorRamp, xlab="",
ylab="", axes=FALSE, zlim=c(min,max))
if( !is.null(title) ){
title(main=title)
}
axis(BELOW<-1, at=1:length(xLabels), labels=xLabels, cex.axis=0.7)
axis(LEFT <-2, at=1:length(yLabels), labels=yLabels, las= HORIZONTAL<-1,
cex.axis=0.7)
# Color Scale
par(mar = c(3,2.5,2.5,2))
image(1, ColorLevels,
matrix(data=ColorLevels, ncol=length(ColorLevels),nrow=1),
col=ColorRamp,
xlab="",ylab="",
xaxt="n")
layout(1)
}
# ----- END plot function ----- #
# Read the table to create the
matrix needed
setwd("/home/natorro/Batmaps/")
mexico_matrix <- read.table("/home/natorro/Batmaps/mexico_matrix.dat",
header=TRUE)
# Let's generate a matrix full
of zeroes
random_matrix <- matrix(0, nrow=175, ncol=175)
# Size of range (area of
distribution)
range_size <- 100
# Let's choose initial point
initial_point_passed <- FALSE
initial_point <- sample(175, 2)
while (initial_point_passed == FALSE){
if (mexico_matrix[initial_point[1], initial_point[2]] == 0)
initial_point <- sample(175, 2) else {
random_matrix[initial_point[1], initial_point[2]] <- 1
initial_point_passed <- TRUE
}
}
# Define vectors x_list and y_list
x_list <- matrix(0, nrow=range_size, ncol=1)
y_list <- matrix(0, nrow=range_size, ncol=1)
x_list[1] <- initial_point[1]
y_list[1] <- initial_point[2]
# Range counter
range_counter <- 1
flag <- 0
while (range_counter < range_size){
random_sq <- round((runif(1) * range_counter ) + 1)
flag <- 0
while (flag == 0) {
if(random_matrix[x_list[random_sq]-1, y_list[random_sq]]== 0 ||
random_matrix[x_list[random_sq] + 1, y_list[random_sq]] == 0 ||
random_matrix[x_list[random_sq], y_list[random_sq] + 1] == 0 ||
random_matrix[x_list[random_sq], y_list[random_sq] - 1] == 0) {
aleatorio <- runif(1)
if (aleatorio < 1) {
if (random_matrix[x_list[random_sq],y_list[random_sq]-1]== 0 ) {
random_matrix[x_list[random_sq], y_list[random_sq] - 1] <- 1
flag <- 1
range_counter <- range_counter + 1
x_list[range_counter] <- x_list[random_sq]
y_list[range_counter] <- y_list[random_sq] - 1
myImagePlot(mexico_matrix + random_matrix)
}
}
if (aleatorio < 0.75){
if (random_matrix[x_list[random_sq],y_list[random_sq] + 1] == 0) {
random_matrix[x_list[random_sq], y_list[random_sq] + 1] <- 1
flag <- 1
range_counter <- range_counter + 1
x_list[range_counter] <- x_list[random_sq]
y_list[range_counter] <- y_list[random_sq] + 1
myImagePlot(mexico_matrix + random_matrix)
}
}
if (aleatorio < 0.50){
if(random_matrix[x_list[random_sq]+1, y_list[random_sq]] == 0) {
random_matrix[x_list[random_sq] + 1, y_list[random_sq]] <- 1
flag <- 1
range_counter <- range_counter + 1
x_list[range_counter] <- x_list[random_sq] + 1
y_list[range_counter] <- y_list[random_sq]
myImagePlot(mexico_matrix + random_matrix)
}
}
if (aleatorio < 0.25) {
if(random_matrix[x_list[random_sq]-1, y_list[random_sq]] == 0 ) {
random_matrix[x_list[random_sq] - 1, y_list[random_sq]] <- 1
flag <- 1
range_counter <- range_counter + 1
x_list[range_counter] <- x_list[random_sq] - 1
y_list[range_counter] <- y_list[random_sq]
myImagePlot(mexico_matrix + random_matrix)
}
}
}
}
}
sum(random_matrix)
#-------------------------------
I do the "sum(random_matrix)" just to check out if the number of zeroes
needed have been set (never has reached 100 so far :-()
I´m not sure what I am doing wrong, I´ve been working with this file in
windows and mac at the same time in a colaboration.
Any help will be greatly appreciated.
Carlos
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