ncl xyMarkerColors画出图只有一个颜色

snow495

代码中有关部分如下：
res@xyMarkLineModes = (/"Markers","Markers","Markers","Markers","Markers","Markers","Markers","Markers","Markers","Markers"/)
res@xyMonoMarker = True
;res@xyMarkers = (/1,1,1,1/)
res@xyMarker = 1
;res@xyMonoLineColor = False
res@xyMonoMarkerColor = False
;colors = read_colormap_file("cosam")
;delete(res@xyMarkerColors)
res@xyMarkerColors   = (/33,68,81,97,111,129,145,161,177,209/);(/"blue","aquamarine","antiquewhite4","blueviolet","brown3","burlywood2","cadetblue1","chartreuse2","chocolate","darkgoldenrod1"/)
;res@xyLineColors = (/"blue","red"/)
res@xyMarkerSizeF       = 0.1


尝试了用index和name设置xyMarkerColors均无效，十个点设置了十个颜色但画出来还是全都是蓝色，有没有朋友知道怎么回事啊