Mutable dynamic data structures for R
GGobi is an interactive, direct manipulation tool for visualizing high-dimensional data across linked plots. The GUI is built using Gtk+. It reads data in regular ASCII format and more richly using an XML format. Plugins for other formats are also available.
./bootstrap
./configure
make
make install
something is wrong; need to check it
I have been wondering for a long while why the number of listeners keeps on increasing when the grand tour is running (qtour() in cranvas), and today I figured out the reason: simply subsetting a mutaframe can add new listeners on it. Here is an example:
library(plumbr)
library(qtbase)
library(objectSignals)
mf_listeners = function(x) listeners(plumbr:::changed(x))
mf = mutaframe(x = rnorm(5), y = rnorm(5))
add_listener(mf, function(i, j) {
timestamp()
str(mf_listeners(mf)) # print str() of mf listeners
})
# use a timer to change mf$x every 2 seconds
tm = qtimer(2000, function() {
mf$x = rnorm(5)
})
tm$start()
## there was only one listener as expected, but the line below will add a new one
mf[1, ] # this will add a listener on mfBecause all plotting functions use [] frequently, the number of listeners can increase rapidly in a tour, which makes the tour slower and slower.
Is this new listener expected? I see it comes from [.mutaframe which uses filter_proxy().
Thanks!
> mutaframe()
Error in raw_bindings(mf, binders[!fun]) : 'data' must have names
Should produce a empty mutaframe
Each one of the following commands works with a data.frae, but not with a mutaframe - ... could we change this?
library(plumbr)
qmtcars <- qdata(mtcars)
qmtcars[,c("x","y")] <- data.frame(rnorm(n=nrow(mtcars)), rnorm(n=nrow(mtcars)))
# Error in which(data != new) :
# error in evaluating the argument 'x' in selecting a method for function 'which': Error: (list) object cannot be coerced to type 'double'
qmtcars[,c("x","y")] <- list(rnorm(n=nrow(mtcars)), rnorm(n=nrow(mtcars)))
# Error in which(data != new) :
# error in evaluating the argument 'x' in selecting a method for function 'which': Error: (list) object cannot be coerced to type 'double'
qmtcars[c("x","y")] <- list(rnorm(n=nrow(mtcars)), rnorm(n=nrow(mtcars)))
# Error in which(data != new) :
# error in evaluating the argument 'x' in selecting a method for function 'which': Error: (list) object cannot be coerced to type 'double'
I think this might be a bug, but I do not know how to fix it:
y = mutaframe(data.frame(a=1))
add_listener(y,function(i,j) print(j))
y$a = 3 # get 'a'
y$b = 2 # Problem 1: get NULL here, should be 'b'
add_listener(y, function(i, j) print(y[j]))
y$c = 5 # Problem 2: error
y # error
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