I would like to do "back" interpolation to find an x value from the given values of z and y.

for example i have all data for x , y and z 

x=[2.6,5.2,14,23.3,28.3,2.6,5.2,14,23.3,28.3,2.6,5.2,14,23.3,28.3]

y=[3.5,6.9,17.7,29.1,35.2,3.5,6.8,17.5,28.7,34.8,3.4,6.6,16.9,27.6,33.5]

z=[450,450,450,450,450,350,350,350,350,350,250,250,250,250,250]

and as you can see from the attachment

if i want to know what is

y =

when x= 20

and z= 367

is ther any function to do that ??????

Answer 1

[KSSV]

Read about scatteredInterpolant.