SAS/SPECTRAVIEW Software User's Guide |
The
SAS/SPECTRAVIEW interface
is a point-and-click, button-driven interface that provides the functionality
to visually explore data.
|
Invoking SAS/SPECTRAVIEW Software |
-
First, bring
up the SAS System. For information
on bringing up the SAS System, see your SAS Installation Representative.
- Issue one or more LIBNAME statements to assign
a libref to each data library containing data sets that you want to use in
the session. For example,
libname mylib 'mypath';
. Details are
provided in Assigning Librefs to Data.
-
Then,
invoke
SAS/SPECTRAVIEW with
a command or as a SAS procedure. On a command line, issue the command
spectraview
; acceptable abbreviations include
spectrav
and
sview
.
Invoking SAS/SPECTRAVIEW with a Command
Or
issue the SPECTRAVIEW procedure, which can be abbreviated to
proc spectrav;
or
proc sview;
. Note that you do not need to include
a RUN statement.
Invoking SAS/SPECTRAVIEW as a Procedure
|
Looking at the Initial Display |
Once you invoke the software,
the initial interface display appears.
By default, the interface is ready for you to load data; that is, [Data] and [Load data] are already selected. From the
initial display, you can do the following:
- Load a SAS data set, which you must do before
you can do anything else. That is, you cannot select any other buttons until
you have loaded a data set. Details are provided in Loading Data.
- Apply data filtering, which is
explained in Adjusting Data with Filters.
- Customize colors for your images with the color
palette. From the color palette, you can define response value ranges and
specify colors for those ranges. You can also specify colors for image customizations
like text, axis tick marks, and so on. Of course, you can simply use the
software defaults. Details are provided in Setting Response Value Colors for Images.
- Request the various visualization
techniques that
produce the images such as cutting planes, point clouds, isosurfaces, a solid-volume
display, and direct volume rendering. Details are provided in Exploring Data with Visualization Techniques.
SAS/SPECTRAVIEW Initial Display
You
interact with the software by selecting buttons with your graphics input device,
which can be a mouse, a pick, or a stylus. SAS/SPECTRAVIEW treats
all graphics input devices the same. For simplicity, this document refers
to the graphics input device as a mouse.
To select a button, position the cursor on it, and click
the left mouse button. Once selected, the button becomes shaded, and in many
cases, additional buttons appear. Note that in some situations, the
software will select a button for you by default.
You view and manipulate images in display windows,
and you communicate
with the software in the text window.
Display Windows
There are four display windows,
which provide different
views of an image:
Display Windows
Instructions to
resize the display windows are in Resizing the Display Windows.
Text Window
Using the text window, which is located to
the right
of the three basic function buttons (that is, [Data], [Palette], and [Tools]), you can enter text and receive
messages from the software.
For example, when you position the cursor on a button,
a one-line help message, which is usually a description or instruction, displays
in the text window. In response, you usually select a button, enter a value,
or use the cursor in a window. You also use the text window to enter specifications,
such as for a WHERE clause or to enter text to be added to an image.
Text Window
Instructions to resize
the text window are in Resizing the Text Window.
Global buttons, located
at the top middle of the interface above the text window, display at all times.
Global buttons provide the following capabilities:
Global Buttons
[Xform] |
To transform an image by rotating
and zooming, to probe for a response value, or to manually move a cutting
plane through the volume grid. |
[Reset] |
To reset the display window's orientation,
the color palette, or the entire software. |
[Axis] |
To define axis labels. |
[Save] |
To save an image as a PostScript
file or a TIFF file or to save data values to a SAS data set. |
[Help] |
To display the online help. |
[Anno] |
To add annotation to an image by
defining text, displaying the response legend, or displaying the bounding
box. |
[Exit] |
To terminate SAS/SPECTRAVIEW software. |
SAS/SPECTRAVIEW provides
online help for the interface buttons and sliders. By default, when you position
the cursor on a button, a one-line help message displays in the text window.
To display more detailed online help, you use the [Help] global
button.
To access the detailed online help:
- Select [Help], then [Detail]. The
software opens the Online Reference window.
- Move the window to a position so that you can
view both it and the SAS/SPECTRAVIEW interface
window. You can move the window by dragging it to any location. You can also
pop it behind the interface.
In order for the Online Reference window to be visible,
the SAS/SPECTRAVIEW interface should
be set to pop-to-top only when you select its window border. If the Online
Reference window does not stay on top, you need to modify your window manager
files as explained in Controlling the Online Reference Window.
- Click the SAS/SPECTRAVIEW
interface
window to make it the active window.
- Position the cursor on a button or slider and
wait a moment. Note that to display online help, you only have to position
the cursor on a button; you do not have to select it.
Online Reference Window
- If the text is longer than the
window, shift the
text vertically with the scroll bar on the right. Clicking the up arrow shifts
the text up; clicking the down arrow shifts the text down. You can also drag
the scroll bar itself up or down.
To remove the Online Reference window and continue the
one-line help message in the text window, select [Help], then [Brief]. To turn off both, select [Off]. Note
that you cannot close the Online Reference window from the window itself.
Using the Detailed Online Help
The text for each button follows a top-down structure.
Information that you need frequently appears at the top. Concepts and other
information that you may read only once appears lower down. Each button's
information
- starts with a general description of that button's
function
- describes subsequent button choices next (if applicable)
- ends with more detailed information, such as,
information on understanding a tool.
|
Recognizing and Using Cursors |
As
you use the interface, you will notice several cursors presented as symbols.
These symbols represent different actions to help you perform an activity.
The default cursor is an arrow. The default cursor will change for some
activities. For example:
- When the software is waiting for you to enter
a response, such as for a filename when saving an image, the default cursor
changes to an input cursor, which is a standard I-beam (eye-beam) symbol.
- When you request to rotate an image, the cursor
changes to a directional symbol, indicating the directions for dragging the
mouse.
- When you are deleting text, a hand symbol displays
so that you can point to the text line to be deleted. The hand symbol also
lets you indicate where you want axis labels to appear.
You exit
SAS/SPECTRAVIEW with
the [Exit] global button, which is located at the top right
of the interface. Exiting SAS/SPECTRAVIEW returns
you to the SAS System.
- Select [Exit]. The button becomes
highlighted, indicating that you need to confirm the request.
- To confirm the request, select [Exit]
again.
Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.