Unix Man page/Perldoc/Info page, English-Chinese Dictionary,
Chinese-English Dictionary
Unix Man page/Perldoc/Info page, English-Chinese Dictionary,
Chinese-English Dictionary
PGPLOT(3pm) User Contributed Perl Documentation PGPLOT(3pm) NAME PDL::Graphics::PGPLOT - PGPLOT enhanced interface for PDL SYNOPSIS perldl> $a = pdl [1..100] perldl> $b = sqrt($a) perldl> line $b perldl> hold Graphics on HOLD perldl> $c = sin($a/10)*2 + 4 perldl> line $c DESCRIPTION "PDL::Graphics::PGPLOT" is a convenience interface to the PGPLOT com- mands, implemented using the object oriented PGPLOT plotting package in PDL::Graphics::PGPLOT::Window. See the documentation for that package for in-depth information about the usage of these commands and the options they accept. The list of currently availably commands: imag - Display an image (uses pgimag()/pggray() as appropriate) im - Shorthand to display an image with aspect ratio of 1 fits_imag - Display a FITS image with appropriate transforms & labels cont - Display image as contour map fits_cont - Display a FITS image in scientific coordinates as a contour map vect - Display 2 images as a vector field fits_vect - Display 2 FITS images in sci. coordinates as a vector field ctab - Load an image colour table ctab_info - Get information about currently loaded colour table line - Plot vector as connected points points - Plot vector as points errb - Plot error bars bin - Plot vector as histogram (e.g. bin(hist($data)) ) hi2d - Plot image as 2d histogram (not very good IMHO...) poly - Draw a polygon text - Write text in the plot area label_axes - Print axis titles legend - Create a legend with different texts, linestyles etc. cursor - Interactively read cursor positions. circle - Draw a circle ellipse - Draw an ellipse. Device manipulation commands: hold - Hold current plot window range - allows overlays etc. release - Release back to autoscaling of new plot window for each command rel - short alias for 'release' env - Define a plot window, put on 'hold' dev - Explicitly set a new PGPLOT graphics device new_window - Create a new plot window (use of dev is recommended) focus_window - Change focus to a new window window_list - Get a list of currently exisiting plot windows close_window - Close an open window FUNCTIONS The following is a list of the functions that are private to this pack- age, for the other functions please read the PDL::Graph- ics::PGPLOT::Window documentation. dev Open PGPLOT graphics device Usage: dev $device, [$nx,$ny, $opt]; $device is a PGPLOT graphics device such as "/xserve" or "/ps", if omitted defaults to last used device (or value of env var "PGPLOT_DEV" if first time). $nx, $ny specify sub-panelling. The function returns the id of the newly created window - this can subsequently be used as argument to "focus_window" to select the window. The result of this command can be modified using options. The options recognised are the same as for "new_window" - which primarily and in addition it is possible to set the default values for a window that are defined in PDL::PGPLOTOptions, see this for details but see below for a synopsis. In addition "dev" recognises the option "NewWindow" which allows the user to specify that a "dev" command is to create a new window rather than closing the previous. This allows a large number of output desti- nations to be open at the same time, which occasionally can be conve- nient. Here is a quick summary of the most useful additional options that can be given: Device Alternative to $device. AspectRatio The aspect ratio of the output window WindowWidth The width of the plot window in inches AxisColour The axis colour to be used as default for plots in this window. In the same way it is possible to set the default character size ("CharSize") and axis and box styles. See PDL::Graphics::PGPLOTOp- tions for details. WindowName The name of a window. This name can subsequently be used to refer to the window instead of its ID, making interactive use somewhat more intuitive. To open a X-window output that will stay on screen: $win = dev('/xs'); To open two windows, one small and square, one large and wide: $win1 = dev('/xs', {Aspect => 1, WindowWidth => 4}); $win2 = dev('/xs', {Aspect => 0.5, WindowWidth => 10}); new_window Open a PGPLOT graphics device $win = new_window($dev, $nx, $ny, $opt); This function is identical to dev except that it always creates a new window. This means that the user is required to close all windows explicitly using close_window. All functionality is otherwise like "dev" so see the documentation for dev for details of use. close_window Close a PGPLOT output device Usage: close_window($id) This function closes a PGPLOT output device created with "dev" or "new_window". It requires the id of the window to close. If $id is left undefined, the currently focussed window is deleted and focus is trans- ferred to the lowest numbered window in existence. If many windows have been created and deleted this might not be what you expect, so it is recommended to make an explicit call to focus_window after any call to "close_window". _get_windownumber Internal function to obtain the ID of a window. This allows the user to refer to a window with its name. focus_window Switch to another output window. Usage: focus_window($id); This command is used to switch output focus to another window created by dev or new_window. The window can be referred to either by its ID or by its name. $win1 = dev('/xs', {WindowName => 'X-output'}); $win2 = dev('test.ps/ps', {WindowName => 'PS-output'}); focus_window('X-output'); # Or focus_window($win1); <.. Commands ..> focus_window($win2); # Or focus_window('PS-output'); <.. Commands ..> window_list Return a list of ID numbers and names of the windows currently opened using dev or "new_window". Usage: ($numbers, $names)=window_list(); $numbers and $names are anonymous arrays giving the ID numbers and names of the open windows respectively. perl v5.8.8 2004-03-16 PGPLOT(3pm) |