Merge remote-tracking branch 'origin/master'

# Conflicts:
#	Install.ps1

Examples/Charts/plot.ps1

@@ -0,0 +1,26 @@
+function plot {
+    param(
+        $f,
+        $minx,
+        $maxx
+    )
+
+    $minx=[math]::Round($minx,1)
+    $maxx=[math]::Round($maxx,1)
+    
+    $file = 'C:\temp\plot.xlsx'    
+    rm $file -ErrorAction Ignore
+
+    $c = New-ExcelChart -XRange X -YRange Y -ChartType Line -NoLegend -Title Plot -Column 2 -ColumnOffSetPixels 35
+    
+    $(for ($i = $minx; $i -lt $maxx-.1; $i+=.1) {
+        [pscustomobject]@{
+            X=$i.ToString("N1")
+            Y=(&$f $i)
+        }
+    }) | Export-Excel $file -Show -AutoNameRange -ExcelChartDefinition $c 
+}
+
+function pi {[math]::pi}
+
+plot {[math]::Tan($args[0])} (pi) (3*(pi)/2-.01)