如何在VBA / Excel中作为点本身的X,Y坐标的函数来改变散点图上的点的颜色? [英] How can I vary the colour of a point on a scatter-graph in VBA/Excel as a function of the X, Y co-ordinates of the point itself?
问题描述
我正在开发一个基于Excel的模拟器,运行一次特定的测试1000次。每个测试的结果是两个坐标。这些坐标被写入一个范围。然后根据该范围创建一个X-Y散点图。
I am developing an Excel-based simulator that runs a specific test 1,000 times. The result of each test is two co-ordinates. These co-ordinates are written to a range. I then create an X-Y Scatter graph based on that range.
我现在想要做的是循环遍历图表中的每一个点,并根据X和Y坐标改变该点的颜色的要点。具体来说,我想要获得X Mod(半最大X)和Y Mod(半最大Y),以便产生颜色的强度将随着靠近图中间的点而增加的效果。
What I now wish to do is to cycle through each of the 1,000 points of the graph, and change the colour of that point based on the X and Y co-ordinate of the point. Specifically, I want to take X Mod (Half Max X) and Y Mod (Half Max Y), in order to create the effect that the intensity of the colour will increase as the points near the middle of the graph.
我想使用的代码如下:
Temp = "'" + FirstCalcs.Name + "'!" + FirstCalcs.Cells(SOWD + 3, 2).Address + ":" + FirstCalcs.Cells(SOWD + 3, NumOfTests + 1).Address
Temp2 = "'" + FirstCalcs.Name + "'!" + FirstCalcs.Cells(SOWD + 4, 2).Address + ":" + FirstCalcs.Cells(SOWD + 4, NumOfTests + 1).Address
Set chtChart = Charts.Add
With chtChart
Do Until .SeriesCollection.Count = 1 ' remove extra series, which Excel spawns like rabbits, for some reason
.SeriesCollection(1).Delete
Loop
.Name = Institution + " summary"
.ChartType = xlXYScatter
'Link to the source data range.
'.SetSourceData Source:=FirstCalcs.Range(Temp)
.SeriesCollection(1).Values = Temp2
.SeriesCollection(1).XValues = Temp
For Each pts In .SeriesCollection(1).Points
.Format.Fill.Solid
'The next line is what I can't figure out
.MarkerBackgroundColor = RGB(XFunctionOf(.pts.XCoor), YFunctionOf(.pts.YCoor), 128)
.MarkerStyle = xlMarkerStyleDiamond
.MarkerSize = 10
End With
Next i
.HasTitle = True
.ChartTitle.Text = "Summary"
.Axes(xlCategory, xlPrimary).HasTitle = True
.Axes(xlCategory, xlPrimary).AxisTitle.Characters.Text = "T"
.Axes(xlValue, xlPrimary).HasTitle = True
.Axes(xlValue, xlPrimary).AxisTitle.Characters.Text = "Time before T achieved"
.HasLegend = False
End With
但是,我无法找到一个方法来获得X AND Y值,以便对它们执行必要的功能。我可以根据点本身的数量(1到1000)改变颜色,但这不是我想要做的 - 颜色是每个点的X,Y坐标的函数。值得说明的是,X和Y坐标的范围是可变的,即测试不返回每次在相同尺度上的结果。
However I can't work out a way to get the X AND Y value in order to perform the requisite function on them. I can vary the colour according to the number of the point itself (1 to 1000), but that is not what I want to do - the colour is a function of the X, Y co-ordinate of each point. It is worth saying that the ranges of both the X and Y co-ordinates are variable, i.e. the test doesn't return results which are on the same scale each time.
任何帮助将非常感激和感谢你提前。
Any help would be enormously appreciated and thank-you in advance.
推荐答案
以下是一个简单的示例,说明如何访问每个点的x和y值:
Here's a simple example of how to access the x and y value for each point:
Sub Tester()
Dim s As Series, i As Long, x, y
Set s = ActiveSheet.ChartObjects(1).Chart.SeriesCollection(1)
For i = 1 To s.Points.Count
x = s.XValues(i)
y = s.Values(i)
If x > 3 And y < 40 Then
s.Points(i).MarkerBackgroundColor = vbRed
End If
Next i
End Sub
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