[#BloombergLP-bdlsta-LineFit-fitIfValid]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlsta.adoc[bdlsta]::xref:BloombergLP/bdlsta/LineFit.adoc[LineFit]::fitIfValid
:relfileprefix: ../../../
:mrdocs:

Calculate line fit coefficients `Y = Alpha + Beta * X`, and populate the specified `alpha` (intercept) and `beta` (slope). Return 0 on success, and non‐zero otherwise. The computations is unsuccessful if `2 > count` or all X's are identical.

== Synopsis

Declared in `<bdlsta_linefit.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
fitIfValid(
    double* alpha,
    double* beta) const;
----


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