Question

question here and would be greatly appreciated if you could help.

I am trying to calculate the sigmoid value of a bigdecimal using something along the lines of this code that I use for double values

double a = 1 / (1 + Math.exp("a"));

However I would like to perform the same operation for the bigdecimal datatype but I cannot find code that will do this for a bigdecimal

Math.exp(x) 

Is there any short piece of code that would provide this sigmoid value on a bigdecimal

Thanks in advance

Answer 1

Have a look at Bayesian MCMC BigDecimalUtils.exp() which uses Taylor’s formula.

BigDecimal exponential = BigDecimalUtils.exp(BigDecimal.valueOf(3.2), 4);