Use of erf(x); read text file; command to display available functions
Subject: Use of erf(x); read text file; command to display available functions
From: Raymond Toy
Date: Tue, 14 Aug 2007 09:05:33 -0400
Bartlett, Charles S. wrote:
> Why doesn't erf(5) produce a numerical result, whereas sin(.3) or
> gamma(.2) do?
>
> I am using Maxima 5.12.0.
>
> It appears that my version is not finding a definition for erf.
Try one of the following: erf(5.0), float(erf(5)), or "erf(5),numer",
or variations thereof.
sin(5) returns just sin(5).
>
> --------------------
>
> Can Maxima read a text file containing a column of numbers?
Yes, but I can't remember the functions to do that. Perhaps read_matrix
can do it?
>
>
> --------------------
>
> Is there a function to display available functions - not just those
> defined by a user?
I'm not aware of a simple function to display all available functions,
but you could do "?? a" which will return all items containing the
letter "a".
Ray