Calculates a decimal y-value from an array of numbers or points at a specified fractional index or x-value using linear interpolation.
An array containing one of the two following data types:
If this input is an array of points, the node uses the first element in the cluster (x) to obtain a fractional index by linear interpolation. The node then uses this fractional index to compute the output y value from the second cluster element (y).
The index or x-value at which the node should return a y-value. fractional index or x must be located directly on a point or between two points for the node to work correctly.
fractional index or x does not interpolate beyond the bounds of an array or data point set. For example, if the parameter is set lower than the first element or x-value in an array, the node returns the value of the first element or the y-value of the first data point. Similarly, if the parameter is set higher than the last element or x-value in the array, the node returns the value in the final element or the final y-value.
The interpolated value of the element at the fractional index or the interpolated y-value of the fractional data point in array.
If you wire an array of numeric values, Interpolate 1D Array interprets fractional index or x as a reference to the array elements.
If you wire an array of data point sets, Interpolate 1D Array interprets fractional index or x as a reference to the x-value elements within each data point set.
array | fractional index or x | y value | comments |
---|---|---|---|
[5, 7] | 0.5 | 6.0 | The output is halfway between the values at elements 0 and 1. |
Array of points [(3,7), (5,9)] |
3.5 | 7.5 | The output is the linearly interpolated value at the x-value corresponding to 3.5. |
Where This Node Can Run:
Desktop OS: Windows
FPGA: All devices (only within an optimized FPGA VI)
Web Server: Supported in VIs that run in a web application