Hello Federico,
I have had the same thoughts and completely agree!
Stefan
On 21/09/2024 22.41, Federico Miyara wrote:
Dear All,
I've noticed that the family of cumulative distribution functions such
as cdfnor(), which are very handy because of their flexibility, in the
syntax cases
X =cdfnor("X", Mean, Std, P, Q)
Mean =cdfnor("Mean", Std, P, Q, X)
Std = cdfnor("Std", P, Q, X, Mean)
it is required to provide both P /and/ Q as arguments, when only one is
really necessary since Q must equal 1-P. Argument Q is, thus, redundant,
and requires extra calculation (even if a trivial one). In the first
syntax one could easily remove Q, but the syntax checker casts an error:
cdfnor: Wrong number of input argument(s): 5 expected.
Is there a reason for such a strange requirement?
I know that changing the syntax of an established function could cause
back-compatibility issues, but it would be much better.
A possible solution would be to create a single function cdf(), the
first argument of which could be a string coding the type of
distribution, such as "nor", "chi", etc., which could be omitted in the
default case of the most frequent one, the normal distribution. This
could be interesting also since new distributions could be added in the
future without the need of a new function.
Regards,
Federico Miyara
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