使用图形生成器时，它允许您“突出显示”或“选择”图例中的特定数据子集。 图形生成器和数据表上的相应输出也会突出显示。 当选择数据子集时，其他子集会淡入背景或以交互方式增加其透明度。
我可以添加与所选数据集相对应的参考线以相同的方式交互运行吗？ 我是否可以让这些线条自动为自己着色，就像我将标称列放入图例字段时那样？
通过索引列表
["addrefline"]
- 好技巧:)
为什么它有效？
它找到第一个符号（独立于大写/小写和空格） - 并返回第一个参数？
这是一些入门 JSL。
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
oldselection = [];// don't update when nothing changes by comparing old to new
f = Function( {a}, // this callback tells which points are changing selected state
// and may send between 1 and N row numbers in the matrix a.
// this example will ignore a and just ask the table about the range of the currently
// selected points.
{subset, hmin, hmax, wmin, wmax, newselection}, // local variables
newselection = dt << getselectedrows; // compare to previous selection...
If( Try( N Rows( newselection ) != N Rows( oldselection ) | Any( newselection != oldselection ), 1 ),
oldselection = newselection; // remember the new selection for next time
dtSubset = dt << subset( SelctedRows( 1 ), LinkToOriginalDataTable( 1 ), invisible ); // make a subset of the selection to summarize
dtSummary = dtSubset << Summary( Min( :height ), Min( :weight ), Max( :height ), Max( :weight ), Freq( "None" ), Weight( "None" ) );
Close( dtSubset, "nosave" ); // done with the subset, use the summary...
hmin = dtSummary:name( "Min(Height)" )[1]; // capture the range of the selected axis
hmax = dtSummary:name( "Max(Height)" )[1];
wmin = dtSummary:name( "Min(Weight)" )[1];
wmax = dtSummary:name( "Max(Weight)" )[1];
Close( dtSummary, "nosave" ); // done with the summary, use the captured values...
// remove 2 old reflines first, from each axis, then add 2 new ones
// remove the old ref lines from the weight axis (1==horizontal)
Report( gb )[axisbox( 1 )] << removerefline( (Report( gb )[axisbox( 1 )] << getscript)["addrefline"] );
Report( gb )[axisbox( 1 )] << removerefline( (Report( gb )[axisbox( 1 )] << getscript)["addrefline"] );
// remove the old ref lines from the height axis (2==vertical)
Report( gb )[axisbox( 2 )] << removerefline( (Report( gb )[axisbox( 2 )] << getscript)["addrefline"] );
Report( gb )[axisbox( 2 )] << removerefline( (Report( gb )[axisbox( 2 )] << getscript)["addrefline"] );
// add the new ref lines...extend the bounding box by .5 for the integer height/weight (not required)
Report( gb )[axisbox( 1 )] << addrefline( wmin - .5, "solid", "red", "a", 2 );
Report( gb )[axisbox( 1 )] << addrefline( wmax + .5, "solid", "green", "b", 2 );
Report( gb )[axisbox( 2 )] << addrefline( hmin - .5, "solid", "blue", "c", 1 );
Report( gb )[axisbox( 2 )] << addrefline( hmax + .5, "solid", "black", "d", 1 );
);
);
rs = dt << make row state handler( f );
gb = Graph Builder(
Size( 416, 300 ),
Show Control Panel( 0 ),
Show Legend( 0 ),
Variables( X( :weight ), Y( :height ) ),
Elements( Points( X, Y, Legend( 3 ) ) ),
SendToReport( Dispatch( {}, "Graph Builder", OutlineBox, {Set Title( "" )} ), Dispatch( {}, "graph title", TextEditBox, {Set Text( "Demo" )} ) )
);
JSL 在数据表中安装 RowState 处理函数；当表的行状态数据更改时（当选择/隐藏/排除行，或者标记样式或颜色更改时），该函数会收到通知。该函数计算所选列的最小值和最大值，并删除旧的参考线并添加新的参考线。
The a-b-c-d ref lines are interactively tracking the rectangular point selectionabcd 参考线交互式地跟踪矩形点选择
它会在更新时闪烁，因为添加或删除每个参考线时都会重新绘制显示；对于大量数据，重绘图表需要很长时间，它可能会变得太慢。
