If you can suggest the desired derivates/integrals,
it would greatly aid in filling the gaps. e.g.
derivative integral
0&o.
4&0.
etc.
Since f@g d. 1 exists if f and g are, the effects
are magnified.
----- Original Message -----
From: John Randall <[email protected]>
Date: Saturday, February 19, 2011 8:47
Subject: [Jprogramming] Derivatives of o. family
To: 'Programming forum' <[email protected]>
> I have been playing around with d. (derivative) and noticed a
> few places
> where J does not supply straightforward derivatives and integrals.
>
> The most obvious omissions are derivatives and integrals of inverse
> trigonometric and inverse hyperbolic functions. These get
> used a fair
> amount and would be handy to have. I also don't see why
> 0&o., 4&o., 8&o.
> and their inverses should be not differentiable: J can do them
> if they are
> spelled out. Similarly, j. is differentiable and
> integrable, but its
> alias _11&o. is not.
>
> I am not suggesting that J aim for the type of symbolic
> calculations done
> by Maple or Mathematica, and I know how to use u`v D. n to
> supply a
> derivative: it would just be nice to have the obvious gaps
> filled in.
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