Computes the linear correlation coefficient between two sequences.
The first input sequence.
The second input sequence.
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
Default: No error
Correlation coefficient between the two input sequences.
Understanding the Values of This Output
correlation coefficient r always is in the interval [-1, 1]. The following table explains the meaning of different correlation coefficient r values:
correlation coefficient r | Explanation |
---|---|
1 | x and y have a complete positive correlation. The data points from x and y lie on a perfectly straight, positively-sloped line. |
-1 | x and y have a complete negative correlation. The data points from x and y lie on a perfectly straight, negatively-sloped line. |
0 | x and y have no correlation. |
Square of the correlation coefficient.
Error information.
The node produces this output according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
The linear correlation coefficient also is known as the product-moment coefficient of correlation or Pearson's correlation. The following equation describes the linear correlation coefficient:
where z_{x} and z_{y} are the standardized z-values of x and y. The standardized z-values indicate how many standard deviations x and y are above or below the mean.
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application