Bug in interpolate scattered 2D

I spent a lot of time to reduce a problem that I had seen and came to the conclusion that, in my view, that there is a bug in the scattered VI 2D interpolate. Because this VI implements just the code of the matrix, I suspect that the bug is actually in the underlying code of the matrix Solver. On the business.

I tried several data sets, but I have narrowed down to some very simple data that you will find in the attached VI, which is a copy of the diagram of scattered blocks 2D interpolation (with some modifications). X and have been made to be ramps from 0 to 10 with a length specified on the front panel. Values of Z are simply a random input between 0 and 1. If you specify the length (number of points) as something other than 208 points, you will get the correct answer (the Z is a random value, but the correct answer must be something on the order of 0 to 1). However, if you specify exactly 208 points, an incorrect answer is returned (by hundreds... where it should be between 0 and 1).

I tested with a range of data sets, and if the number of datapoints exactly 208, then the answer will be inactive about 1e3 1e4 factor or more.

Anyone nor able to comment or anyone else seen this problem? The VI is saved in 2016.

Hello

Thanks for reporting this problem. I think it may be a bug in the underlying implementation of linear equations Solver in the DLL. I bring a CAR to track this problem.

Tags: NI Software

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