Need to call a numeric value from a chart using 2 reference numbers

[Lee9]

I have a temperature reading & a pressure reading from my fieldpoint modules that I use to retrieve a number value from a 2-dimensional chart. I would like to create the chart in LabVIEW 7.1 and have LabVIEW return the corresponding value I need from the temp & press. values that I specify. I am not sure how to program such an application, whether to create the chart using Excel or if their is an Express VI in Labview to use, and how to input/output values.

[BEWIN]

you could use a 2D array to store the chart information. You can use the XY graph vi to make the chart and use index and search function to lookup specific information in the 2D array or use interpolation functions like interpolate 1D array.vi