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`@@ -150,6 +150,51 @@ fig.add_selection(x0="2019年01月01日", y0=0.95, x1="2019年10月01日", y1=1.15)`
`150`	`150`	`fig.show()`
`151`	`151`	```
`152`	`152`
	`153`	`+## Referencing Selections on a Scatterplot Matrix`
	`154`	`+`
	`155`	`+`
	`156`	+You can add selections to a scatteplot matrix by specifying `xref` and/or `yref`. Here, we add one selection on the plot with axis ids `x2` and `y2` and another on the plot with ids `x3` and `y`.
	`157`	`+`
	`158`	+```python
	`159`	`+import plotly.express as px`
	`160`	`+`
	`161`	`+df = px.data.iris()`
	`162`	`+`
	`163`	`+fig = px.scatter_matrix(df,`
	`164`	`+ dimensions=["sepal_length", "sepal_width", "petal_length", "petal_width"],`
	`165`	`+ color="species")`
	`166`	`+`
	`167`	`+fig.update_layout(`
	`168`	`+ xaxis = {"matches": "y"},`
	`169`	`+ xaxis2 = {"matches": "y2"},`
	`170`	`+ xaxis3 = {"matches": "y3"},`
	`171`	`+ xaxis4 = {"matches": "y4"},`
	`172`	`+ height = 900,`
	`173`	`+ width = 750,`
	`174`	`+ dragmode = 'select',`
	`175`	`+ selections = [`
	`176`	`+ dict(`
	`177`	`+ x0 = 3,`
	`178`	`+ x1 = 4,`
	`179`	`+ xref = "x2",`
	`180`	`+ y0 = 8,`
	`181`	`+ y1= 6,`
	`182`	`+ yref = "y"`
	`183`	`+ ),`
	`184`	`+ dict(`
	`185`	`+ x0 = 5,`
	`186`	`+ x1 = 1,`
	`187`	`+ xref = "x3",`
	`188`	`+ y0 = 5,`
	`189`	`+ y1= 4,`
	`190`	`+ yref = "y",`
	`191`	`+ )`
	`192`	`+ ]`
	`193`	`+)`
	`194`	`+`
	`195`	`+fig.show()`
	`196`	+```
	`197`	`+`
`153`	`198`	`## Referencing Selections on Multiple Cartesian Subplots`
`154`	`199`
`155`	`200`

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