functionexponentialIntegralE1
Exponential integral, E1
Extends from Modelica.Icons.Function (Icon for functions).
Information
Evaluates the exponential integral (E1), based on the polynomial and rational approximations of Abramowitz and Stegun (1964).
References
Abramowitz, Milton, and Irene A. Stegun. Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables. National Bureau of Standards. (1964): 1046 p.
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | x | Independent variable |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | E1 | Exponential integral E1(x) |
Revisions
-
July 16, 2018 by Michael Wetter:
Inlined function. -
March 21, 2018 by Massimo Cimmino:
First implementation.