YValue

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yvalue($p[ref])

 

Finds the x value of a bivariate data point. It is normally used with data parameters.

 

For example if you have created the following data parameter.

 

$b=data((11,12)(15,19)(21,28)(13.2,19.4),(8,16))

 

You can access the y value of one of the data points.

 

yvalue($b[3])  will return 28