### Options

`PAUSE` = scalar |
Time in seconds to pause before changing to the next window; default 1 |

### Parameter

`WINDOW` = scalar |
Window number to view |

### Description

The Genstat Graphics Viewer displays all graphs sent to `DEVICE`

`1`

in windows, only one of which can be seen at a time. The open windows are always numbered sequentially from one. You can use `DVIEW`

to display any of these windows. The `WINDOW`

parameter specifies which one to display. A positive integer *n* displays the *n*th window. Alternatively, a negative integer –*n* displays the *n*th window from the top: for example `WINDOW=-2`

displays the graph plotted immediately before the most recent graph. If a list of windows is provided, the windows are displayed sequentially. The `PAUSE`

option specifies how long to wait, in seconds, before moving on to the next window; default 1. This allows you to create an animated series of graphs. For example `DVIEW [PAUSE=0.5] 1...100`

creates a movie from the first 100 graphs in the viewer, displaying each new frame after a half second delay. The minimum pause achievable between graphs will depend on the complexity of the graphs and the speed of the computer. Options: `PAUSE`

. Parameter: `WINDOW`

.

### See also

Directive: `DCLOSE`

.

Commands for: Graphics.

### Example

" Movie with DVIEW " DCLOSE " Close viewer." SCALAR N; VALUE=100 VARIATE [VALUES=1...N] Index CALCULATE t = Index + 4 & X = (t)**(2/3)*COS(C('pi')*(t/3)**(2/3)) & Y = (t)**(2/3)*SIN(C('pi')*(t/3)**(2/3)) PEN 1,2; SYMBOL='circle'; COLOUR='black','red'; CFILL='match'; SIZE=0.5,2 FOR [NTIMES=N; INDEX=i] CALC Pen = 1 + (Index == i) DGRAPH [WINDOW=3; KEY=0] Y; X; PEN=Pen ENDFOR %SLEEP 10 " Allow graphs to display in viewer." DVIEW [PAUSE=0.1] 1...N DCLOSE 0 " Close all windows."