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IMSL_FRESNEL_COSINE

Syntax | Return Value | Arguments | Keywords | Discussion | Example | Version History

The IMSL_FRESNEL_COSINE function evaluates the cosine Fresnel integral.


Note
This routine requires an IDL Analyst license. For more information, contact your ITT Visual Information Solutions sales or technical support representative.

Syntax

Result = IMSL_FRESNEL_COSINE(x [, /DOUBLE])

Return Value

The value of the cosine Fresnel integral evaluated at x.

Arguments

x

Argument for which the function value is desired.

Keywords

DOUBLE

If present and nonzero, double precision is used.

Discussion

The cosine Fresnel integral is defined to be

Example

The Fresnel integral C(1.75) is evaluated. 

PRINT, IMSL_FRESNEL_COSINE(1.75)  
     0.321935

Version History

6.4
Introduced

  IDL Online Help (March 06, 2007)