chf_1F1 | R Documentation |
Kummer's function (also: confluent hypergeometric function of the first kind) for numeric (non-complex) values and input parameters in log-scale.
chf_1F1(x, a, b)
x |
numeric value or vector |
a, b |
numeric parameters of the Kummer function |
Note that the output is in log-scale. So the evaluated function is:
log [ ∑ from n to ∞ (a^(n) x^n)/ (b^(n) n!)]
where a^(n) and b^(n) describe the rising factorial.
x <- chf_1F1(-100:100, 5, 7) plot(-100:100, x, type='l')
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