I noticed a couple of issues in the calculus addon. 0&p. deriv 1
gives an error. i.e. it can't handle the constant zero function. This also has an effect on other polynomials. 2&p. deriv 2 will fail. Also, deriv should be able to handle f^g easily, even if not able to tidy up the resulting expression, when necessary. I added an implementation of deriv for f^g, arbitrary differentiable f,g. e.g. cos(x)^sin(x) ((2&o.)^(1&o.)) deriv 1 will give ((2&o. * ^.@(2&o.)) + (1&o. * -@(1&o.)) % 2&o.) * 2&o. ^ 1&o. instead of an error. I made a Pull Request: https://github.com/jsoftware/math_calculus/pulls Thanks, Jon ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
