index array was missing
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@@ -515,9 +515,9 @@ class PlotPeriodogram(AbstractPlotClass): # pragma: no cover
@@ -577,14 +577,14 @@ class PlotPeriodogram(AbstractPlotClass): # pragma: no cover
@@ -607,7 +607,7 @@ class PlotPeriodogram(AbstractPlotClass): # pragma: no cover
@@ -698,14 +698,15 @@ class PlotPeriodogram(AbstractPlotClass): # pragma: no cover
@@ -716,6 +717,6 @@ def f_proc_2(g, m, pos, variables_dim, time_dim):