Created
December 8, 2020 13:11
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Zeroth Order Modified Bessel Function of the First Kind
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| x = 2; | |
| ax = abs(x); | |
| if (ax < 3.75) | |
| y = x/3.75; | |
| y = y*y; | |
| ans = 1.0+y*(3.5156229+y*(3.0899424+y*(1.2067492 + y*(0.2659732+y*(0.360768e-1+y*0.45813e-2))))); | |
| else | |
| y=3.75/ax; | |
| ans = (exp(ax)/sqrt(ax))*(0.39894228+y*(0.1328592e-1 ... | |
| +y*(0.225319e-2+y*(-0.157565e-2+y*(0.916281e-2 ... | |
| + y*(-0.2057706e-1+y*(0.2635537e-1+y*(-0.1647633e-1 ... | |
| +y*0.392377e-2)))))))); | |
| end |
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