I'm running Gnuplot in one of my applications and every time I generate a graph and run the executable, the Windows command line prompt displays for a short period of time before closing itself. Is there a way to hide the terminal and keep it from displaying?
Here's a section of the code I'm using:
# Create gnuplot
Gnuplot.open do |gp|
Gnuplot::Plot.new( gp ) do |plot|
plot.set("terminal", "png small size 800,500")
plot.set("title", File.basename(#current_epw_file))
plot.set("ylabel", "\"y1\" rotate by 0")
plot.set("y2label", "\"y2\" rotate by 0")
plot.set("bmargin", "7")
if (#show_grid)
plot.set("grid")
end
plot.set("xdata","time")
plot.set("timefmt", "\"%m/%d %H:%M\"")
plot.set("format", "x \"%m/%d\\n%H:%M\"")
plot.set("xrange", xrange)
plot.set("y2tics")
plot.set("key", "under")
# Insert day markers if that option is selected
if (#mark_days)
day_markers = generate_day_markers(xrange)
day_markers.each do |marker|
plot.set("arrow", "from \"#{marker} 0:00\",graph(0,0) to \"#{marker} 0:00\",graph(1,1) nohead")
end
end
plot.set("output", "weather_display.png")
plot.data = []
# Load all the data sets
for file in dataset_files
plot.data << Gnuplot::DataSet.new( "'#{file}'" ) do |ds|
weather_parameter_object = #requested_parameters.slice!(0)
ds.with = #with_value
# Check thick lines option
if (!#thick_lines)
ds.linewidth = 1
else
ds.linewidth = 2
end
ds.using = "1:3"
y_axis = #parameter_axes.slice!(0)
ds.axes = "x1y#{y_axis}"
if (using_both_axes)
ds.title = "#{weather_parameter_object.name} (#{weather_parameter_object.units}) [y#{y_axis}]"
else
ds.title = "#{weather_parameter_object.name} (#{weather_parameter_object.units})"
end
end
end
end
path = Plugin.dir + "/lib/ruby/ruby/gems/1.8/gems/gnuplot-2.6.2/gnuplot/bin/weather_display.png"
while (File.exists?(path) and File.size(path) > 0)
# Wait until image has been created
end
end
Related
This is my code:
require "gtk3"
builder_file = "#{File.expand_path(File.dirname(__FILE__))}/example.ui"
builder = Gtk::Builder.new(:file => builder_file)
window = builder.get_object("window")
window.signal_connect("destroy") { Gtk.main_quit }
progressbar=builder.get_object("progressbar1")
progressbar.set_fraction(0.5)
button = builder.get_object("button1")
button.signal_connect("clicked") {
for i in(0..4)
sleep(1)
puts "query " + (i+1).to_s + " done"
a=(i+1)/5.to_f
puts a
progressbar.set_fraction(a)
end
}
Gtk.main
sleep is just a placeholder for a web query that takes about 1 second. When I execute this code on my machine, the console output is fine, but the progress bar stays empty until it jumps to full after five seconds, which is not what I want. How can I make use of the progress bar?
The integration of the event loop of the GUI tool (Gtk, Tk, etc) and Ruby annoys beginners including me. I know two ways.
1.add thread
require 'gtk3'
win = Gtk::Window.new('Sample')
win.signal_connect('destroy') { Gtk.main_quit }
box = Gtk::Box.new(:vertical)
pb = Gtk::ProgressBar.new
pb.set_fraction(0.5)
b = Gtk::Button.new(label: 'Button')
b.signal_connect('clicked') do
Thread.new do
5.times do |i|
sleep 1
pb.fraction = (i + 1) / 5.0
end
end
end
win.add box
box.pack_start pb
box.pack_start b
win.show_all
Gtk.main
2.use GLib::Timeout
b.signal_connect('clicked') do
i = 0.0
GLib::Timeout.add(1000) do |a|
i += 0.2
pb.fraction = i
i < 1.0 # return false and stop when i >= 1.0
end
end
I have a few commands from a Twitch chat, it works and it's awesome! People can type commands like !about and it's going to send a response. There's just one problem, if you go down to the thread and look under # // COMMANDS // COMMANDS // COMMANDS. There's a problem, there´s a few admin commands (look under # ADMIN COMMANDS // ADMIN COMMANDS). I have this: if msg.include?("!project") then msg.slice!("!project "), but it's not working like I want it to. I want to be able to type !project Then some substring here. But when a substring is attached it doesn't work, even though I can print msg and it clearly includes !project. Both the !disconnect and !project command work when it's only those commands by themselves. Meaning that something like !disconnect Hello World wouldn't work even though it clearly includes !disconnect.
# Message formatting in console
class String
def red; "\e[31m#{self}\e[0m" end
def yellow; "\e[33m#{self}\e[0m" end
def green; "\e[32m#{self}\e[0m" end
def cyan; "\e[36m#{self}\e[0m" end
def bold; "\e[1m#{self}\e[22m" end
end
# Requied packages / modules
require 'socket'
require 'logger'
require 'open-uri'
# Create logger
File.delete("log.txt") # Clear previous log
log = Logger.new("log.txt", formatter: proc {|severity, datetime, progname, msg|
"#{datetime}: #{msg}\n"})
# Required Info
load "credentials.txt"
log.info("Loading \"credentials.txt\"")
# -------- IGNORE -------- #
OAUTH.downcase!
BOTNAME.downcase!
CHANNEL.downcase!.gsub!("#", "")
# //- AGE -// #
time = Time.new
age = time.year - 2000
if time.month == 10
if time.day < 28
age -= 1
end
elsif time.month < 10
age -= 1
end
# -------- IGNORE -------- #
# Save "Preparing to connect" to "log.txt"
log.info("Preparing to connect")
# Variables
socket = TCPSocket.new('irc.chat.twitch.tv', 6667)
send = "PRIVMSG ##{CHANNEL} :" # shortcut for sending messages
running = true
content = nil
message_count = 0
message_limit = Time.now.to_i
# Commands
commands = ["!about","!uptime","!commands","!cortexio","!followed"]
api_commands = ["!followed","!uptime"]
admin_commands = ["!disconnect","!project"]
# Authorization Login
socket.puts("PASS #{OAUTH}") # Send the password(oauth) to Twitch
socket.puts("NICK #{BOTNAME}") # Send the botname to Twitch
socket.puts("JOIN ##{CHANNEL}") # Send the channel to Twitch
# Save "Connected!" to "log.txt
log.info("Joining #{CHANNEL.capitalize} as #{BOTNAME.capitalize} using OAUTH Token: #{OAUTH[6,OAUTH.length-12]}" + "*"*12)
# Thread.abort_on_exception = true
# Loop (Background Thread) for recieving Twitch chat data
Thread.start do
socket.puts(send + "Connected!") # Send "Connected!" to the Twitch channel
puts "#{BOTNAME} Joined ##{CHANNEL}" # Connection Status
puts "You should be fully connected now" # Connection Status
puts ""
puts "Type \"clear\" to clear terminal"
puts ""
while (running) do
ready = IO.select([socket])
ready[0].each do |s|
line = s.gets
# Respond to Twitch IRC "PING" Message
if line.index("PING") == 0
line.strip!
socket.puts("PONG :tmi.twitch.tv\r\n")
log.info("[IRC Message]: " + line)
log.info("[IRC Response]: PONG :tmi.twitch.tv")
puts("-".bold.red*line.length)
puts "[Twitch] ".bold.cyan + "IRC: ".bold.yellow + line.bold.green
puts "[Response] ".bold.cyan + "IRC: ".bold.yellow + "PONG :tmi.twitch.tv".bold.green
puts("-".bold.red*line.length)
end
match = line.match(/^:(.+)!(.+)PRIVMSG ##{CHANNEL} :(.+)$/)
message = match && match[3]
if message =~ /^/
message.strip!
user = match[1] # Get username
# Twitch message limit - (Max 100 messages in 30 secs - Applies to mods and above)
# Avoid global ban
if Time.now.to_i - message_limit > 30 # If more than 30 seconds has passed
message_count = 0 # Reset "message_count"
end
if message_count == 0 # If "message_count" is 0
message_limit = Time.now.to_i # Start counting to 30 again
end
message_count = message_count + 1
end
# // COMMANDS // COMMANDS // COMMANDS
if message != nil
msg = message.downcase
# ADMIN COMMANDS // ADMIN COMMANDS
if admin_commands.include?(msg) and user == CHANNEL
if msg.include?("!disconnect")
socket.puts(send + "Disconnecting") # Disconnect from the channel
socket.puts("PART ##{CHANNEL}") # Disconnect from the channel
Disconnect()
log.info("[Command] #{user}: #{message}")
elsif msg.include?("!project")
msg.slice!("!project ")
File.write("Responses/project.txt", msg)
end
user = user.capitalize # Capitalize first letter (Cuz I'm that kind of person)
elsif commands.include?(msg) and message_count < 80
puts "[Command] ".bold.cyan + "#{user}: ".bold + "#{message}".bold.cyan
# API COMMANDS // API COMMANDS
if api_commands.include?(msg)
if msg.include?("!uptime")
file = open("https://decapi.me/twitch/uptime?channel=#{CHANNEL}")
content = "#{CHANNEL} has been streaming for: " + file.read
elsif msg.include?("!followed")
file = open("https://decapi.me/twitch/followage/#{CHANNEL}/#{user}")
content = file.read
if content == "Follow not found"
content = "#{user} is not following #{CHANNEL}"
else
content = "#{user} has been following #{CHANNEL} for " + content
end
end
puts "[Response] ".bold.red + "Cortexio: ".bold + "API: ".bold.yellow + "\"#{content}\"".bold.red
else
file = open "Responses/" + msg.gsub!("!","") + ".txt" # open matching file
content = file.read
file.close
puts "[Response] ".bold.red + "Cortexio: ".bold + "File: ".bold.yellow + "\"#{msg}.txt\"".bold.red
end
file.close
log.info("[Command] #{user}: #{message}")
else
puts "[Message] ".bold.green + "#{user}: ".bold + "#{message}".bold.green
log.info("[Message] #{user}: #{message}")
if message[0] == "!" # Unrecognized command
content = "Unrecognized command: \"#{message}\" - Type !commands to see a list of available commands."
end
end
# Response handling
if content != nil
content.gsub!("USER", "##{user}")
content.gsub!("AGE", "#{age}")
content.gsub!("CHANNEL", "#{CHANNEL}")
if content.include?("COMMANDS")
content.gsub!("COMMANDS", "#{commands}")
content.gsub!("\"", "")
content.gsub!("[","")
content.gsub!("]","")
end
socket.puts(send + content) # Send response if any
content = nil # Too avoid multiple messages with the same response
end
end
end
end
end
def Disconnect() # End script
running = false
exit
end
# Loop to keep bot going
while (running) do
input = gets.chomp
if input == "clear"
system "clear" or system "cls"
end
end
The problem isn't with
if msg.include?("!project")
it's with the line before it:
admin_commands.include?(msg)
admin_commands is an array which contains the 2 strings ["!disconnect","!project"]. It does not, however, contain the string "!project Then some substring here", so you are never checking if msg.include?("!project"). You should be seeing your log messages about an unrecognized command, which means you aren't making it into your first if statement. What you'll want to be doing is something like:
if admin_commands.any? { |command| msg.include?(command) }
if msg.include?("!project")
# ...
The line: pics.box.signal_connect("button_press_event"){pics.nuImage}, triggers nuImage and adds 1 to the picindex counter upon clicking, making the current image destroy, and next image show. I would like to make this automatic, like a slideshow without having to click. It needs to show a new image every x amount of seconds, using a sleep or something like GLib.timeout_add_seconds (), but I do not understand how to implement these options to continue looping without any user input. Thank you for your help, I am very new to ruby.
require 'gtk2'
class Pics
attr_accessor :pile, :picindex, :imgLoaded, :image, :box, :window, :time
def initialize
#window = Gtk::Window.new()
#window.signal_connect("destroy"){Gtk.main_quit}
pic1 = "1.jpg"
pic2 = "2.jpg"
pic3 = "3.jpg"
pic4 = "4.jpg"
#pile = [pic1, pic2, pic3, pic4]
#picindex = 0
self.getImage
#box = Gtk::EventBox.new.add(#image)
#time = true
end
def nuImage
#box.remove(#image)
#picindex = #picindex + 1
#picindex = 0 if #picindex == #pile.length
self.getImage
#box.add(#image)
#box.show
end
def getImage
#imgLoaded = #pile[#picindex]
img = Gdk::Pixbuf.new(#imgLoaded, 556, 900)
#image = Gtk::Image.new(img)
#image.show
end
end # class Pics
pics = Pics.new
pics.box.signal_connect("button_press_event"){pics.nuImage}
pics.window.set_default_size(556, 900)
pics.window.add(pics.box)
pics.window.show_all
Gtk.main
the following code is an implementation:
GLib::Timeout.add(1000) do
pics.nuImage if pics.time
true
end
pics.window.signal_connect("key_press_event") do |_window, event|
case event.keyval
when Gdk::Keyval::GDK_KEY_space
pics.time = !pics.time
end
end
more details: http://ruby-gnome2.sourceforge.jp/hiki.cgi?GLib%3A%3ATimeout
related: Ruby GTK Pixbuf timed image change
I have problems reading a CSV file with two columns separated by "\tab".
My code is:
require 'csv'
require 'rubygems'
# Globals
INFINITY = 1.0/0
if __FILE__ == $0
# Locals
data = []
fn = ''
# Argument check
if ARGV.length == 1
fn = ARGV[0]
else
puts 'Usage: kmeans.rb INPUT-FILE'
exit
end
# Get all data
CSV.foreach(fn) do |row|
x = row[0].to_f
y = row[1].to_f
p = Point.new(x,y)
data.push p
end
# Determine the number of clusters to find
puts 'Number of clusters to find:'
k = STDIN.gets.chomp!.to_i
# Run algorithm on data
clusters = kmeans(data, k)
# Graph output by running gnuplot pipe
Gnuplot.open do |gp|
# Start a new plot
Gnuplot::Plot.new(gp) do |plot|
plot.title fn
# Plot each cluster's points
clusters.each do |cluster|
# Collect all x and y coords for this cluster
x = cluster.points.collect {|p| p.x }
y = cluster.points.collect {|p| p.y }
# Plot w/o a title (clutters things up)
plot.data << Gnuplot::DataSet.new([x,y]) do |ds|
ds.notitle
end
end
end
end
end
The file is:
48.2641334571 86.4516903905
0.1140042627 35.8368597414
97.4319168245 92.8009240744
24.4614031388 18.3292584382
36.2367675367 32.8294024271
75.5836860736 68.30729977
38.6577034445 25.7701728584
28.2607136287 64.4493377817
61.5358486771 61.2195232194
I'm getting this error:
test.csv:1: syntax error, unexpected ',', expecting $end
48.2641334571,86.4516903905
^
You are just missing an end at the bottom. Your very first if is not closed.
CSV are "Comma-Separated Values". Yours are using tabs. This is not a big problem, because the CSV class can handle it, you just need to specify that your separator is a tab:
CSV.foreach(fn, { :col_sep => "\t" })
Be sure to double-check your file that it is using tabs, not spaces which are not the same.
I'm still confused about the error message, is this everything you received?
I'm looking for an easy way to get width and height dimensions for image files in Ruby without having to use ImageMagick or ImageScience (running Snow Leapard).
As of June 2012, FastImage which "finds the size or type of an image given its uri by fetching as little as needed" is a good option. It works with local images and those on remote servers.
An IRB example from the readme:
require 'fastimage'
FastImage.size("http://stephensykes.com/images/ss.com_x.gif")
=> [266, 56] # width, height
Standard array assignment in a script:
require 'fastimage'
size_array = FastImage.size("http://stephensykes.com/images/ss.com_x.gif")
puts "Width: #{size_array[0]}"
puts "Height: #{size_array[1]}"
Or, using multiple assignment in a script:
require 'fastimage'
width, height = FastImage.size("http://stephensykes.com/images/ss.com_x.gif")
puts "Width: #{width}"
puts "Height: #{height}"
You could try these (untested):
http://snippets.dzone.com/posts/show/805
PNG:
IO.read('image.png')[0x10..0x18].unpack('NN')
=> [713, 54]
GIF:
IO.read('image.gif')[6..10].unpack('SS')
=> [130, 50]
BMP:
d = IO.read('image.bmp')[14..28]
d[0] == 40 ? d[4..-1].unpack('LL') : d[4..8].unpack('SS')
JPG:
class JPEG
attr_reader :width, :height, :bits
def initialize(file)
if file.kind_of? IO
examine(file)
else
File.open(file, 'rb') { |io| examine(io) }
end
end
private
def examine(io)
raise 'malformed JPEG' unless io.getc == 0xFF && io.getc == 0xD8 # SOI
class << io
def readint; (readchar << 8) + readchar; end
def readframe; read(readint - 2); end
def readsof; [readint, readchar, readint, readint, readchar]; end
def next
c = readchar while c != 0xFF
c = readchar while c == 0xFF
c
end
end
while marker = io.next
case marker
when 0xC0..0xC3, 0xC5..0xC7, 0xC9..0xCB, 0xCD..0xCF # SOF markers
length, #bits, #height, #width, components = io.readsof
raise 'malformed JPEG' unless length == 8 + components * 3
when 0xD9, 0xDA: break # EOI, SOS
when 0xFE: #comment = io.readframe # COM
when 0xE1: io.readframe # APP1, contains EXIF tag
else io.readframe # ignore frame
end
end
end
end
There's also a new (July 2011) library that wasn't around at the time the question was originally asked: the Dimensions rubygem (which seems to be authored by the same Sam Stephenson responsible for the byte-manipulation techniques also suggested here.)
Below code sample from project's README
require 'dimensions'
Dimensions.dimensions("upload_bird.jpg") # => [300, 225]
Dimensions.width("upload_bird.jpg") # => 300
Dimensions.height("upload_bird.jpg") # => 225
There's a handy method in the paperclip gem:
>> Paperclip::Geometry.from_file("/path/to/image.jpg")
=> 180x180
This only works if identify is installed. If it isn't, if PHP is installed, you could do something like this:
system(%{php -r '$w = getimagesize("#{path}"); echo("${w[0]}x${w[1]}");'})
# eg returns "200x100" (width x height)
I have finally found a nice quick way to get dimensions of an image. You should use MiniMagick.
require 'mini_magick'
image = MiniMagick::Image.open('http://www.thetvdb.com/banners/fanart/original/81189-43.jpg')
assert_equal 1920, image[:width]
assert_equal 1080, image[:height]
libimage-size is a Ruby library for calculating image sizes for a wide variety of graphical formats. A gem is available, or you can download the source tarball and extract the image_size.rb file.
Here's a version of the JPEG class from ChristopheD's answer that works in both Ruby 1.8.7 and Ruby 1.9. This allows you to get the width and height of a JPEG (.jpg) image file by looking directly at the bits. (Alternatively, just use the Dimensions gem, as suggested in another answer.)
class JPEG
attr_reader :width, :height, :bits
def initialize(file)
if file.kind_of? IO
examine(file)
else
File.open(file, 'rb') { |io| examine(io) }
end
end
private
def examine(io)
if RUBY_VERSION >= "1.9"
class << io
def getc; super.bytes.first; end
def readchar; super.bytes.first; end
end
end
class << io
def readint; (readchar << 8) + readchar; end
def readframe; read(readint - 2); end
def readsof; [readint, readchar, readint, readint, readchar]; end
def next
c = readchar while c != 0xFF
c = readchar while c == 0xFF
c
end
end
raise 'malformed JPEG' unless io.getc == 0xFF && io.getc == 0xD8 # SOI
while marker = io.next
case marker
when 0xC0..0xC3, 0xC5..0xC7, 0xC9..0xCB, 0xCD..0xCF # SOF markers
length, #bits, #height, #width, components = io.readsof
raise 'malformed JPEG' unless length == 8 + components * 3
# colons not allowed in 1.9, change to "then"
when 0xD9, 0xDA then break # EOI, SOS
when 0xFE then #comment = io.readframe # COM
when 0xE1 then io.readframe # APP1, contains EXIF tag
else io.readframe # ignore frame
end
end
end
end
For PNGs I got this modified version of ChristopeD's method to work.
File.binread(path, 64)[0x10..0x18].unpack('NN')