Does R have any facilities, or packages, for graphing complex functions? I find that 'curve' does not do the trick. Example:
> f = function(x) cos(x) + 1i * sin(x) > curve(f, -pi, pi) Error in xy.coords(x, y, xlabel, ylabel, log) : (converted from warning) imaginary parts discarded in coercion Enter a frame number, or 0 to exit 1: curve(f, -pi, pi) 2: plot(x = x, y = y, type = type, xlab = xlab, ylab = ylab, xlim = xlim, log = lg, ...) 3: plot.default(x = x, y = y, type = type, xlab = xlab, ylab = ylab, xlim = xlim, log = lg, ...) 4: xy.coords(x, y, xlabel, ylabel, log) 5: .signalSimpleWarning("imaginary parts discarded in coercion", quote(xy.coords(x, y, xlabel, ylabel, log))) 6: withRestarts({ .Internal(.signalCondition(simpleWarning(msg, call), msg, call)) .Internal(.dfltWarn(msg, call)) }, muffleWarning = function() NULL) 7: withOneRestart(expr, restarts[[1]]) 8: doWithOneRestart(return(expr), restart) 9: (function () { error() utils::recover() })() Selection: [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.