I’d really appreciate any help with modelling this data.
The plot above is the x and y with a colour map determined by the temperature and for each datapoint. I’ve drawn on two lines to show the linear models I am trying to estimate. A linear relationship that describes both the low temperature steps and one that fits the high temperature steps. Identifying x and y intercepts and gradients in both cases.
I have tried to treat the data with the following hierarchical model. But this model isn’t achieving my aims.
and here is the data
mix_iso.csv (981 Bytes)
Any help would be greatly appreciated, thanks