Background:
I'm new to Octave, as of today.
I am running GNU Octave, version 4.0.2 on Ubuntu 16.04 LTS
I'm using the command-line interface at the terminal (ie, open the terminal and, type "octave").
I'm aware that there is a GUI, but I want to see if I can get this working in the terminal [such a setup is my preference in most applications]
PROBLEM:
Plots are plotted in text. As in:
How can I get a good-looking plot in a plotting window? I genuinely haven't been able to find this information in 10 minutes of Googling...I think it should be easier than that....maybe someday this post will be the easy solution for others.
Best,
-Ryan
I personally do this a lot; it looks like you have it installed in a *nix environment... Octave can produce nice looking figures through cooperation with a couple graphic toolkits, GNUPlot being the one i'm more familiar with.
Check out the documentation at: https://www.gnu.org/software/octave/doc/v4.0.1/Plotting.html
Without seeing your code we're kind of just guessing. I would try something like
figure();
to see if you get a fresh plot window, or try
available_graphics_toolkits()
to ensure that you actually have something installed to generate separate figures.
Related
I'm a Python beginner and recently came across the Atom editor and the package Hydrogen, that implements the Jupyter notebook. I did so after realizing that running the notebook in Chrome consumed way too many resources and also seemed to be a bit slower.
However, the Atom editor and Hydrogen always output prints within a little frame in the code (see image). Unfortunately, it doesn't use the full window width. I also don't see any console/terminal for installing pip libraries.
Is there a way to have the output in a console below the code, just as in Jupyter, and to have a terminal?
this comes most certainly too late, but in case someone else searches for this:
hit control+shift+P / cmd+shift+P and type "toggle output area".
Is there any way out here?
Evince is the standard PDF viewer of Ubuntu. The immensely popular platform for statistics, R, started its life as a Linux package. But when I do a plot in R -- vanilla, no frills, no user options -- and save it to PDF, I can never see axis labels, titles etc. In evince, even though they appear in every possible viewer (Acrobat, Foxreader, Sumatra, qpdfview) on any OS. I have included qpdfview as default in memeapps.list, but when I double-click a PDF file, I get evince. Is there any help except uninstall evince (which I don't want to do as it helps with other file formats).
This is an issue I am encountering for different pieces of codes I am writing in R.
Basically, I would like to generate a window that displays a picture (a .png file). Following for instance guidances from this or this, I come up with this kind of code:
library(tcltk)
tmpFile <- tempfile(fileext = ".png")
download.file("https://www.r-project.org/logo/Rlogo.png", tmpFile)
tcl("image","create","photo", "imageLogo", file=tmpFile)
win1 <- tktoplevel()
tkpack(ttklabel(win1, image="imageLogo", compound="image"))
This works fine under Mac OS, but not on Linux nor on Windows, where I am displayed such an error message:
[tcl] couldn't recognize data in image file
I can find some workarounds when I want to display graphs, using for instance packages tkrplot or igraph. Nonetheless, I would be really eager to understand why I got such errors when running my scripts on Linux or Windows, whereas it works just fine on Mac OS.
Apologies in case this issue is obvious, but I haven't found anything about potential differences with the tcltk package depending on the OS.
Tk's native support for PNG was added in 8.6. Prior to that, you need to have the tkimg extension loaded into Tk to add the image format handler required. If your installation of Tcl/Tk that R is using is set up right, you can probably make it work with:
tclRequire("Img")
once you've initialised things sufficiently. Yes, the name used internally is “Img” for historical reasons, but that's just impossible to search for! (This is the key thing in this mailing list message from way back.)
However, upgrading the versions of Tcl and Tk to 8.6 is likely to be a better move.
Finally and a bit lately, I would like to close this issue and sum up the different suggestions that were kindly made in response of my question:
R comes along with Tcl 8.5, even with the latest version 3.3.2, which means that there is no way for embedding a PNG file with the usual command into a window created thanks to Tcl/Tk. For some reasons it is working on Mac OS, but do not expect this to work easily on other OSs.
In order to display pictures, graphs, etc. in a window generated by Tcl/Tk in R, better look for either using the GIF support (when possible) or trying alternative solutions (see the question for possible alternative options).
In case one really wants to display PNG files, the solution consists of installing Tcl 8.5 (for instance ActiveTcl) along with the extension Img. In order to use the Tcl/Tk package that you've just installed on your computer, you can refer to the R FAQ for Windows for instance (as stated in the FAQ, you need to install Tcl 8.5 - I tried with Tcl 8.6, thereby hoping to solve my issue, but it didn't work). Basically, you need to set up an environment variable (MY_TCLTK) and put the path where the package Tcl/Tk is installed. Needless to be said, Tcl/Tk is commonly used in R in order to implement GUIs; if you have to go through very complex procedures to set up the system, the package definitely loses its advantages.
Finally, since Tcl 8.6 should be available soon or later with R (already implemented in the devel version), this issue will be de facto outdated.
I'm new here.
I've the same matter as this one but only using QtOctave; beside oct2mat pkg hasn't never been loaded on my pc.
Typing:
pkg unload oct2mat
octave returns:
error: package oct2mat is not installed
error: \share\octave\3.6.2\m\pkg\pkg.m at line 2170, column 9
Using plot function directly in Octave it works properly, very stange!
Can enybody help me?
Thanks in advance.
Addendum to #vinukn's answer, as it might be too cryptic.
Try this:
>>> graphics_toolkit
ans = fltk
>>> agts = available_graphics_toolkits
agts =
{
[1,1] = fltk
[1,2] = gnuplot
}
>>> graphics_toolkit(agts{2}) % This sets the graphics toolkit.
>>> plot([1 2 3 4])
That is, the default was FLTK, and I've set Gnuplot. Try each, they look slightly different to each other.
This is on my default installation of Octave 3.6.2 on Windows Vista, with QtOctave. (I've tried the most recent build of Octave, with built-in GUI, but after starting it never drew in its windows, so it was unusable at this stage, which is a shame as there are probably a handful of lines of code that need to be changed to make it work... Will wait until that is fixed. In the meantime, Gnuplot doesn't freeze.)
Also, here is a list of keys to use in the Gnuplot window. Especially note:
Right-click to draw a zoom box.
a to autoscale (back to default zoom).
p to go back to the most recent previous zoom.
Don't use QtOctave. It has been deprecated for a reason. See the GUI section in Octave FAQ to understand why the GUI doesn't work. It is specially true for things such as plots and dialog windows.
Take special note on the fact that QtOctave and others are specially sensitive to new versions of Octave. You are using Octave 3.6.2 while QtOctave was abandoned back in 3.2.X. Your options are (by order of what I recommend):
use Octave on its own, no QtOctave;
build from development sources to use the experimental GUI;
fix QtOctave (I actually don't recommend this one at all. Its website has been closed, and it would be too much work which would be better spent helping the Octave developers with the native GUI);
Actually,the reason behind this problem is default graphics toolkit fltk or qt. Qtoctave works with pipe, fltk does nt support pipe, ie fltk works inside octave. Pipe does nt support both text and image(gui) same time. The solution is change default toolkit to gnuplot.
Is there an easy way to turn of all GUI elements in R and run it solely from the command line on OSX?
I'm trying to replicate the behavior of a remote linux terminal on my OSX machine. Thus plot() should just save a file and things like CRAN mirror selection should be text, not a Tk interface. I'm having trouble finding where to set this behavior.
I had this exact question and wanted a way to do it without changing my existing code. I usually run with graphics support but sometimes I'll run a script on the server for a larger dataset and then I just want the plots to be output somewhere automatically.
In Dirk's answer Ian Fellows gives the simple solution. On the command line in R type:
options(device=pdf)
And then any plots will be written to the current directly to an Rplots.pdf file.
If you want the files to not be plotted at all then use
options(device=NULL)
For the plots you can just direct the output to a file using the pdf() command (or png(), jpeg()...).
I don't own an OS X box, but did you try to unset the X11 environment variable DISPLAY:
DISPLAY="" R --vanilla
When I do that on Linux and query R for capabilties(), x11 comes up as FALSE as desired.
I don't run OSX but you could attempt to run R from the Terminal application, rather than the Mac OSX launcher, and see whether that runs as you need.
As Matti writes, you can send output to files using the following commands; but I don't know if that's really the substance of your question.
png("pngfile.png")
plot(foo)
title(main="bar")
dev.off()
So instead of the quartz graphical object, your output goes to the file.
Similarly, you can output what would normally appear in the terminal to a file.
sink("foo.file")