XX_Dist
Advanced Analysis Library Only
AnalysisLibErrType XX_Dist (double xx, int degreesOfFreedom, double *probabilityOfXx);
Purpose
Approximates the one-sided probability:
p = prob(X ≤ xx)
where X is a random variable from the 
2-distribution with the specified degrees of freedom.
Example Code
double x, p;
int n;
x = -123.456;
n = 6;
XX_Dist (x, n, &p);
/* Now p = 0 because chi-square distributed variables are non-negative. */
Parameters
| Input | ||
| Name | Type | Description |
| xx | double | The point from which the probability is computed. Range: –∞ < x < ∞ |
| degreesOfFreedom | int | Degrees of freedom for the chi-squared distribution. |
| Output | ||
| Name | Type | Description |
| probabilityOfXx | double | Calculated probability (0 ≤ p < 1). |
Return Value
| Name | Type | Description |
| status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants. |
Additional Information
Library: Advanced Analysis Library
Include file: analysis.h
LabWindows/CVI compatibility: LabWindows/CVI 3.1 and later