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LOOKUP, combining value on x and y axis



I am trying to extract a value from a table (Entalpy), which is a function of the x and y value. In the first column I have numbers representing temperature, and in the top row i have numbers representing pressure. For each temperature and pressure, a value is returned (see figure below). 


In another table, I have a column with measured temperature and one with measured pressure.  


My wish is that the measured values are matched with the corresponding values in table Entalpy, and the calculated value is returned.


Is this possible in Power BI, and if so how?




Super User
Super User

Unpivot your Entalpy table to bring it into a usable format like this:   x|y|value

Then load both tables into your Power BI file and think about the rules for matching - most likely you want to find the closest matching value, but what if your data points sits exactly in the middle etc.


Please provide sanitized sample data that fully covers your issue. Paste the data into a table in your post or use one of the file services. Please show the expected outcome.

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