LogLinear Plot
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg620] LogLinear Plot
- From: Paul E Howland <PEHOWLAND at taz.dra.hmg.gb>
- Date: Thu, 30 Mar 1995 14:03:40 +0200 (IST)
A colleague of mine is using LogLinearPlot to plot some functions that show propagation loss (on y-axis) against range (on x-axis). The range covers just over three decades on the plot. The function should appear as very simple smooth curves. However, when plotted using LogLinearPlot with its default number of points, there is a noticeable "kink" in the graph, where the graph has obviously been undersampled. The only way my colleague has found to get around this is to set PlotPoints->1000, which obviously increases the plot time no end. My question is: Does LogLinearPlot sample the function to be plotted in the linear domain, before plotting it in the log domain? This would explain the poor sampling of the function for small values of x. If so, why doesn't LogLinearPlot sample the function in the log domain, so that the displayed plot has been evenly sampled across its width? Is there any way round this problem, other than increasing PlotPoints to some silly value? Paul E Howland Long Range Ground Radar Systems Section tel. +44 (0)1684 895767 CSS2 Division, Room BY209 fax. +44 (0)1684 896315 Defence Research Agency email: PEHOWLAND at DRA.HMG.GB Malvern, Worcs, WR14 3PS, UK. -----------------------------------------------------------------------------