Read Chart Properties using VBA - vba

I'm using VBA to create some graphics I need to do.
Basically, what I want to do is to create the 1st series automatically and then, the 2nd series, copy the color and format from the 1st series.
I'm trying to do this code but with no success:
ActiveChart.SeriesCollection(a - 1).Select
ActiveChart.SeriesCollection(a).Border.ColorIndex = ActiveChart.SeriesCollection(a - 1).Border.ColorIndex
ActiveChart.SeriesCollection(a).MarkerBackgroundColorIndex = ActiveChart.SeriesCollection(a - 1).MarkerBackgroundColorIndex
ActiveChart.SeriesCollection(a).MarkerForegroundColorIndex = ActiveChart.SeriesCollection(a - 1).MarkerForegroundColorIndex
ActiveChart.SeriesCollection(a).MarkerStyle = ActiveChart.SeriesCollection(a - 1).MarkerStyle
Can someone please help me on how to read the properties from the previous series and apply them to the next?
Thanks.

In general something like this could work:
Sub Tester()
Dim Cht as Chart
Dim a As Series, b As Series, x As Long
Set cht = ActiveChart
Set a = cht.SeriesCollection(1)
For x = 2 To cht.SeriesCollection.Count
Set b = cht.SeriesCollection(x)
b.Border.Color = a.Border.Color
b.MarkerBackgroundColor = a.MarkerBackgroundColor
b.MarkerForegroundColor = a.MarkerForegroundColor
b.MarkerStyle = a.MarkerStyle
Next x
End Sub
Note however that some properties will not be read unless the first series was manually formatted, and is not just the "default" format.
Eg: see Fill and Border color property of data point marker (scatter or line) Excel VBA for similar problem.

Related

Excel Chart - How to draw discontinuous series in VBA without range reference

Excel 2010.
Issue : I need to plot a *single* *discontinuous* series in a XY-scatter chart *via VBA* without referencing a range in the sheet.
It is easy to achieve that when the Yvalues are laid-out in a sheet range, by inserting blank values at the discontinuities ; as long as one selects 'Show empty cells as: Gaps' in Select Data > Hidden and Empty Cells. Here is an example (the Series2 in red is the one that matters) :
So I was trying to reproduce the same via VBA :
Sub addDiscountinuousSingleSeries()
Dim vx As Variant, vy As Variant
Dim chrtObj As ChartObject, chrt As Chart, ser As Series
Set chrtObj = ActiveSheet.ChartObjects("MyChart"): Set chrt = chrtObj.Chart
Set ser = chrt.SeriesCollection.NewSeries
vx = Array(0.3, 0.3, 0.3, 0.7, 0.7, 0.7)
vy = Array(-1, 1, vbNullString, -1, 1, vbNullString)
'vy = Array(-1, 1, CVErr(xlErrNA), -1, 1, CVErr(xlErrNA)) 'doesn't work either
'vy = Range(RANGE_YVALUES_WITH_BLANK) 'this would work, but I do not want to reference a range
chrt.DisplayBlanksAs = xlNotPlotted 'VBA equivalent to 'Show empty cells as: Gaps'
With ser
ser.Name = "VBA Series"
.XValues = vx
.Values = vy
End With
End Sub
But the blank values in the vy array seems to be ignored and the two vertical bars are now connected, which I am trying to avoid (green series).
I know that I could delete the middle line programmatically, but in the real-life problem I am trying to solve it would not be the right solution (too complex, too slow).
My question : is there a way to specify the series' .Values array to get the expected behavior and get a gap between the two vertical green segments in vba (with only one series and no reference to a sheet range)?
You could just format the lines you don't want. Maybe not the prettiest way, but it'd achieve what your after.
ser.Points(3).Format.Line.Visible = msoFalse
ser.Points(4).Format.Line.Visible = msoFalse
ser.Points(6).Format.Line.Visible = msoFalse
Or:
For i = 1 To ser.Points.Count
If i <> 1 Then k = i - 1 Else k = i
If ser.Values(i) = 0 Or ser.Values(k) = 0 Then
ser.Points(i).Format.Line.Visible = msoFalse
End If
Next

VBA Excel: Different colors in one line diagram depending on value

I'm looking for a way to have three different colors in the same line chart of a diagram in Excel, depending on the values themselves or where they are from (from which sheet f.e).
Till now, I have the following code:
Sub ChangeColor()
Dim i As Integer
Dim IntRow As Integer
Dim r As Range
ActiveSheet.ChartObjects("Cash").Activate
ActiveChart.SeriesCollection(1).Select
IntRow = ActiveChart.ChartObjects("Cash").Count
For i = 2 To IntRow
Set r = Cells(2, i)
If r.Value < 3000 Then
Selection.Border.ColorIndex = 5
Else
Selection.Border.ColorIndex = 9
End If
Next
End Sub
However, the if statement is not considered and the color of the whole line changes only whenever I change the first ColorIndex. I have no idea, how to color parts of the line depending on the values in the underlying table.
Moreover, by defining IntRow as ActiveChart.ChartObjects("Cash").Count I'm not able to get the length of my array. This problem can be solved by manual counting and declaring IntRow as an Integer, however, the version above seems nicer (if that is possible of course).
I appreciate any help! Thank you.
Alexandra
You can read the values directly from the chart series:
Sub ChangeColor()
Dim cht As Chart, p As Point, s As Series
Dim i As Integer
Dim numPts As Long
'access the chart directly - no select/activate required
Set cht = ActiveSheet.ChartObjects("Cash").Chart
'reference the first series
Set s = cht.SeriesCollection(1)
'how many points in the first series?
numPts = s.Points.Count
'loop over the series points
For i = 1 To numPts
Set p = cht.SeriesCollection(1).Points(i)
p.Border.ColorIndex = IIf(s.Values(i) < 3000, 5, 9)
Next
End Sub

VBA - Creating a chart where each series represents a data point

I am trying to write a bit of VBA that will automatically populate a scatter chart such that each row (x,y) in a table represents a series i.e. one point per series. I attach below my code so far. But when I come to run it it fails with the following run time error
"Run-time error '438':
Object doesn't support this property or method.
Sub CreateChart()
Dim NPOINTS As Integer
Dim NVAL(1000) As Range, XVAL(1000) As Range, YVAL(1000) As Range
Sheets("Scenario").Select
Range("B4").Select
NPOINTS = Worksheets("Scenario").Range(Selection, Selection.End(xlDown)).Rows.Count
Set Scenario = Worksheets("Scenario")
ActiveSheet.Shapes.AddChart2(240, xlXYScatter).Select
NVAL0 = "B3"
XVAL0 = "C3"
YVAL0 = "D3"
For i = 1 To NPOINTS
Set NVAL(i) = Cells(Range(NVAL0).Offset(i, 0).Row, Range(NVAL0).Column)
Set XVAL(i) = Cells(Range(XVAL0).Offset(i, 0).Row, Range(XVAL0).Column)
Set YVAL(i) = Cells(Range(YVAL0).Offset(i, 0).Row, Range(YVAL0).Column)
ActiveChart.SeriesCollection.NewSeries
ActiveChart.FullSeriesCollection(i).Name = NVAL(i)
ActiveChart.FullSeriesCollection(i).XValues = XVAL(i)
ActiveChart.FullSeriesCollection(i).YValues = YVAL(i)
Next
End Sub
Where am I going wrong?
The y-values in a scatter plot are stored in Values, not YValues, so you need to change the last line accordingly.

Using VBA to change bar color based on ID value in array

I am creating a series of column graphs that show performance for each ID on one metric, but would like to highlight the columns which belong top performers on another, related metric. I do not have the data for the related metric, only a list (in Excel, on the same sheet) of IDs which are top performers.
Conditional formatting makes it easy enough to highlight the IDs that are contained in the list of top performers, but I would also like to change the color of those IDs' columns in the column chart without manually clicking to change each one.
This code (from this valuable thread) seems like it should be able to do what I am looking for, but I'm not familiar enough with VBA to understand how to put an array within an if condition or to apply it to all charts within a worksheet/workbook.
Dim c As Chart
Dim s As Series
Dim iPoint As Long
Dim nPoint As Long
Set c = ActiveChart
Set s = c.SeriesCollection(1)
nPoint = s.Points.Count
For iPoint = 1 To nPoint
If s.XValues(iPoint) = "avg" Then
s.Points(iPoint).Interior.Color = RGB(255, 0, 0)
End If
Next iPoint
I'm a Stata/SAS programmer and not overly familiar with VBA, but am confident that something like
local list=R26C2:R26C12
foreach worksheet in (all worksheets) {
foreach bar in (all_graphs of &worksheet) {
color &bar=blue if id in(&list)
}
}
should not be giving me as much trouble as I'm having trying to do this in VBA. Any help would be appreciated. Thanks!
Something like this should work (untested)
Dim rngTP As Range
Set rngTP = Range("A1:A10") 'for example
nPoint = s.Points.Count
For iPoint = 1 To nPoint
If Not IsError(Application.Match(s.XValues(iPoint), rngTP, 0)) Then
s.Points(iPoint).Interior.Color = RGB(255, 0, 0)
End If
Next iPoint

Elegant way to highlight chart data series in Excel

I want to outline the chart data range source(s) in a table, in much the same way that the GUI will outline a range in blue if the chart data series is clicked. The user can choose various chart views and the range highlight colours for each data series need to match those displayed in the chart.
For the record, here are the methods I considered:
Parse the chart series values string and extract the data range
Do a lookup on a table that stores information on the ranges and the colours to be used
In the end I went with option 2 as is seemed easier to implement and to properly manage the colours I would probably have to store them for method 1 anyway, negating its benefits.
The highlight procedure is called from the Worksheet_Change event, a lookup is done on the chart name, the ranges and colours pulled from the table and then the cell formatting is carried out. The limitation of this method is that the range/colour data for each new chart view must be pre-calculated. This isn't much of a problem for my current implementation, but my be a limiting factor in future use where the charts might be more dynamic.
So although I've got a version of this working fine, I'm sure there must be a more elegant way of achieving this.
Any suggestions?
Edit:
OK, this seems to handle more cases better. The triggering code is the same, but here is new code for the module:
Function SeriesRange(s As Series) As Range
Dim sf As String, fa() As String
sf = s.Formula
sf = Replace(sf, "=SERIES(", "")
If sf = "" Then
Set SeriesRange = Nothing
Exit Function
End If
fa = Split(sf, ",")
Set SeriesRange = Range(fa(2))
End Function
Sub x(c As Chart)
Dim sc As Series
Dim sr As Range
If SeriesRange(c.SeriesCollection(1)) Is Nothing Then
Exit Sub
End If
Set sr = SeriesRange(c.SeriesCollection(1))
sr.CurrentRegion.Interior.ColorIndex = xlNone
For Each sc In c.SeriesCollection
If sc.Interior.Color > 1 Then
SeriesRange(sc).Interior.Color = sc.Interior.Color
ElseIf sc.Border.ColorIndex > 1 Then
SeriesRange(sc).Interior.Color = sc.Border.Color
ElseIf sc.MarkerBackgroundColorIndex > 1 And sc.MarkerBackgroundColorIndex < 57 Then
SeriesRange(sc).Interior.ColorIndex = sc.MarkerBackgroundColorIndex
ElseIf sc.MarkerForegroundColorIndex > 1 And sc.MarkerForegroundColorIndex < 57 Then
SeriesRange(sc).Interior.ColorIndex = sc.MarkerForegroundColorIndex
Else
MsgBox "Unable to determine chart color for data series " & sc.Name & " ." & vbCrLf _
& "It may help to assign a color rather than allowing AutoColor to assign one."
End If
Next sc
End Sub
/Edit
This is probably more barbaric than elegant, but I think it does what you want. It involves your first bullet point to get the range from the Series object, along with a sub to run through all the Series objects in the SeriesCollection for the chart. This is activated on Chart_DeActivate. Most of this code is jacked - see comments for sources.
In a module:
Function SeriesRange(s As Series) As Range
Dim sf As String, fa() As String
Dim i As Integer
Dim result As Range
sf = s.Formula
sf = Replace(sf, "=SERIES(", "")
fa = Split(sf, ",")
Set SeriesRange = Range(fa(2))
End Function
Sub x(c As Chart)
Dim sc As Series
Dim sr As Range
Set sr = SeriesRange(c.SeriesCollection(1))
sr.CurrentRegion.Interior.ColorIndex = xlNone
For Each sc In c.SeriesCollection
SeriesRange(sc).Interior.Color = sc.Interior.Color
Next sc
End Sub
In the ThisWorkbook object module:
' Jacked from C Pearson http://www.cpearson.com/excel/Events.aspx '
Public WithEvents CHT As Chart
Private Sub CHT_Deactivate()
x CHT
End Sub
Private Sub Workbook_Open()
Set CHT = Worksheets(1).ChartObjects(1).Chart
End Sub
Have you tried using Conditional Formatting?