问题
I am trying to plot multiple lists in the same plot in Mathematica (ListLinePlot) and use PlotMarkers and the PlotLegend Package to get the final figure. The issue is that Mathematica puts a marker for every point and this makes it hard to tell which marker is where in the plot. Is it possible to have a plot marker appear every n sample (e.g. every 10 points for a 100 point plot).
The Directive at the moment is PlotMarkers->{Automatic, Small}.
回答1:
If you want more control over the location of the plot markers than Brett's answer gives you, then you probably have to place the markers manually. Eg (modifying Brett's example)
data = Accumulate /@ RandomReal[{-1/2, 1}, {3, 100}];
col = {Red, Blue, Green};
decimate[i_] := {col[[i]], PointSize -> Medium,
Point /@ Transpose[{Range[1, 100, 10], data[[i, 1 ;; -1 ;; 10]]}]}
ListLinePlot[data, PlotStyle -> col, Epilog -> Table[decimate[i], {i, 3}]]
Of course Point can be replaced with any graphics object you want - eg Text, Inset etc...
回答2:
I think adding something like Mesh->10 should work for you:
data = Accumulate /@ RandomReal[{-1/2, 1}, {3, 100}];
ListLinePlot[data, PlotMarkers -> {Automatic, Small}, Mesh -> 10]
回答3:
Also remember you can use Tooltip to cause the marker coordinates to pop up when you pass the mouse pointer over it:
回答4:
The example of what I was describing in the comment. The markers don't behave properly.
Apparently I cannot post images yet, but running the following code
data = Accumulate /@ RandomReal[{-1/2, 1}, {3, 100}];
ListLinePlot[data, PlotMarkers -> {Automatic, Small}, Mesh -> 5]
should give improper results. Also the number of data and plots in the same figure is quite large to individually select which points and I would like to keep the same Directives for different plots and data ranges as they tend to vary between 100 to around 300 in each case and I have to save them in different tables as they are used in other calculations along the way.
Plot Posted by belisarius, running the code above
来源：https://stackoverflow.com/questions/4789047/custom-intervals-of-markers-in-mathematica-plotmarkers