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-rw-r--r--applications/luci-statistics/luasrc/statistics/rrdtool.lua11
1 files changed, 7 insertions, 4 deletions
diff --git a/applications/luci-statistics/luasrc/statistics/rrdtool.lua b/applications/luci-statistics/luasrc/statistics/rrdtool.lua
index 844c157d15..45deb85099 100644
--- a/applications/luci-statistics/luasrc/statistics/rrdtool.lua
+++ b/applications/luci-statistics/luasrc/statistics/rrdtool.lua
@@ -180,20 +180,23 @@ function Graph._generic( self, opts, plugin, plugin_instance, dtype, index )
-- is first source in stack or overlay source: source_stk = source_nnl
if not prev or source.overlay then
- -- create cdef statement
+ -- create cdef statement for cumulative stack (no NaNs) and also
+ -- for display (preserving NaN where no points should be displayed)
_tif( _args, "CDEF:%s_stk=%s_nnl", source.sname, source.sname )
+ _tif( _args, "CDEF:%s_plot=%s_avg", source.sname, source.sname )
-- is subsequent source without overlay: source_stk = source_nnl + previous_stk
else
-- create cdef statement
_tif( _args, "CDEF:%s_stk=%s_nnl,%s_stk,+", source.sname, source.sname, prev )
+ _tif( _args, "CDEF:%s_plot=%s_avg,%s_stk,+", source.sname, source.sname, prev )
end
-- create multiply by minus one cdef if flip is enabled
if source.flip then
-- create cdef statement: source_stk = source_stk * -1
- _tif( _args, "CDEF:%s_neg=%s_stk,-1,*", source.sname, source.sname )
+ _tif( _args, "CDEF:%s_neg=%s_plot,-1,*", source.sname, source.sname )
-- push to negative stack if overlay is disabled
if not source.overlay then
@@ -253,11 +256,11 @@ function Graph._generic( self, opts, plugin, plugin_instance, dtype, index )
-- derive area background color from line color
area_color = self.colors:to_string( self.colors:faded( area_color ) )
- -- choose source_stk or source_neg variable depending on flip state
+ -- choose source_plot or source_neg variable depending on flip state
if source.flip then
var = "neg"
else
- var = "stk"
+ var = "plot"
end
-- create legend