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  (c) TransEra Corp, 2021
I1
Modified Bessel function of the first kind, order one.
 
Loading        LOADSUB ALL FROM "BESMC.HTS"
or LOADSUB FROM "MATHLIB.HTS"
 
Usage                REAL X,Y
Y=FNI1(X)
 
Description                
FNI1 returns the value of the modified cylindrical Bessel function of the first kind and order one of x, I1(x). I1(x) is defined for all values of x, but large absolute values of x may cause the magnitude of the result to be larger than MAXREAL, the largest value representable.
 
Errors                
FNI1 causes an HTBasic error if its argument is not of type REAL or if the magnitude of the result would be larger than MAXREAL.
 
See Also
I0, I1e, In, K0
 
I1(x)