Question

Is there an equivalent to the expr command which works for complex numbers (represented lists of two doubles)?

This library provides functions for complex number arithmetic, and this seems to be a useful utility to define the required cexpr function, but it doesn’t work well.

E.g. it doesn’t handle properly the brackets.

ParseExpressions::ParseExpr { (1) + ((2) + (3)) } { }

returns

+ [+ 1 ((2)] (3))

while it should return

+ [+ 1 2] 3

Also
ParseExpressions::ParseExpr { {1 2} + {3 4} } {}

returns

+ 1 2 3 4

while it should return

+ {1 2} {3 4}

So basically I am asking for a robust version of this utility.

Answer 1

Why don’t you try this: http://wiki.tcl.tk/11415
or something like this too: http://wiki.tcl.tk/13885

I hope these are easy to use alternatives for the mentioned utility.