vb.net怎么绘制带坐标轴的的一次函数？最好附上源码。

1、利用公式求出Y值 　第一列设置表头为x，下面依次填入取值， 比如 x 1 2 3 4 ...... 第二例表头设置为y，在下面表格中填入计算公式 如 =2*x+1 然后选中点右下角的十字型标记，拖下去，和前面x数量一致。 2、然后选中数据源（即选中要进行操作的数据区域，这里指XY值所在区域。） 3、执行菜单命令插入——图表——XY散点图 　执行命令，打开图表向导对话框选XY散点图－－选平滑线散点图－－完成　 最后使用图表向导在横坐标填入x值，纵坐标填入y值，生成图即可 将一次函数的Y列用公式编辑出来，分别填写出当取不同的X值时得到不的函数值，选择函数值所在列，插入——图表按提示操作。执行菜单命令 执行菜单命令

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vb.net怎么绘制平面直角坐标系

创建Graphics对象，可以调用CreateGraphics()直接做图也可以创建Bitmap对象然后调用Graphics.FromBitmap(b)得到Graphics G

G.Clear(Colors.Black)

G.DrawLine(Pens.White, 画线的坐标

如何用vb实现坐标图

太好玩啦~~~~~哈哈 终于完工啦

窗体上放一个textbox 两条line 一个label 代码粘贴 运行 即见效果

'*************************************************************************

'**工程名称：平面座标

'**说 明：小鸟工作室 版权所有2007 - 2008(C)1

'**创 建 人：秋色烽火

'**日 期：2007-12-18 14:08:15

'**版 本：V1.0.0

'*************************************************************************

Const DPITCH = 300 '点距

Dim WithEvents oControlx1 As Line

Dim WithEvents oControlx2 As Line

Dim WithEvents oControly1 As Line

Dim WithEvents oControly2 As Line

Dim WithEvents oControlShape As Shape

Dim WithEvents oControlPixinfo As Label

Dim DPCound%, PixID%, PixBackColor, dotx%, doty%

Private Sub Form_Load()

Me.Caption = "平面座标 - by 秋色烽火[小鸟工作室]"

Me.Height = 9300

Me.Width = 9300

Line1.X1 = 150

Line1.X2 = Me.Width - 150

Line1.Y1 = Me.Height / 2

Line1.Y2 = Line1.Y1

Line2.Y1 = 150

Line2.Y2 = Me.Height - 150

Line2.X1 = Me.Width / 2

Line2.X2 = Line2.X1

Label1.Width = 255

Label1.Height = 255

Label1.AutoSize = ture

Label1.BackStyle = 0

Label1.FontItalic = True

Label1.FontBold = True

Label1.FontSize = 10

Label1.ForeColor = HFF

Label1.Caption = "O"

Label1.Left = Me.Width / 2 + Label1.Width - 100

Label1.Top = Me.Height / 2 - Label1.Height

Text1.Text = ""

Call AddLine

Text1.ToolTipText = "请输入整数座标(x,y) 中间用英文逗号分隔~~~,双击文本框或回车开始标注" vbCrLf " 右击显示帮助信息 " vbCrLf "输入座标请介乎于" DPCound \ 2 "至" -1 * DPCound \ 2 "之间~~"

PixID = 0

End Sub

Sub AddLine()

DPCound = (Me.Width - 300) / DPITCH - 2

For i = DPCound \ 2 + 1 To DPCound

Set oControlx1 = Controls.Add("VB.Line", "lineW" i, Me)

Set oControlx2 = Controls.Add("VB.Line", "lineW" DPCound \ 2 - (i - (DPCound \ 2 + 1)), Me)

Set oControly1 = Controls.Add("VB.Line", "lineH" i, Me)

Set oControly2 = Controls.Add("VB.Line", "lineH" DPCound \ 2 - (i - (DPCound \ 2 + 1)), Me)

With oControlx1

.Visible = True '显示

.X1 = Me.Width / 2 + (i - DPCound \ 2) * DPITCH

.X2 = Me.Width / 2 + (i - DPCound \ 2) * DPITCH

.Y1 = Me.Height / 2 - 60

.Y2 = Me.Height / 2 + 60

End With

With oControlx2

.Visible = True '显示

.X1 = Me.Width / 2 - (i - DPCound \ 2) * DPITCH

.X2 = Me.Width / 2 - (i - DPCound \ 2) * DPITCH

.Y1 = Me.Height / 2 - 60

.Y2 = Me.Height / 2 + 60

End With

With oControly1

.Visible = True '显示

.Y1 = Me.Height / 2 + (i - DPCound \ 2) * DPITCH

.Y2 = Me.Height / 2 + (i - DPCound \ 2) * DPITCH

.X1 = Me.Width / 2 - 60

.X2 = Me.Width / 2 + 60

End With

With oControly2

.Visible = True '显示

.Y1 = Me.Height / 2 - (i - DPCound \ 2) * DPITCH

.Y2 = Me.Height / 2 - (i - DPCound \ 2) * DPITCH

.X1 = Me.Width / 2 - 60

.X2 = Me.Width / 2 + 60

End With

Next

End Sub

Sub AddPix()

If InStr(Text1.Text, ",") 0 Then

If IsNumeric(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1)) And IsNumeric(Mid$(Text1.Text, InStr(Text1.Text, ",") + 1, Len(Text1.Text))) Then

If CInt(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1)) = DPCound \ 2 And CInt(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1)) = -1 * DPCound \ 2 Then

PixID = PixID + 1

Set oControlShape = Controls.Add("VB.Shape", "Pix" PixID, Me)

Set oControlPixinfo = Controls.Add("VB.Label", "Pixinfo" PixID, Me)

With oControlShape

.Visible = True '显示

.Shape = 3

'.BorderColor = HFF

.BackColor = HFF 'RGB(Int(Rnd * 255), Int(Rnd * 255), Int(Rnd * 255)) 'HFF

.BackStyle = 1

.BorderStyle = 0

.Width = 75

.Height = 75

.Left = Me.Width / 2 + CInt(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1)) * DPITCH

.Top = Me.Height / 2 - CInt(Mid$(Text1.Text, InStr(Text1.Text, ",") + 1, Len(Text1.Text))) * DPITCH

dotx = .Left

doty = .Top

PixBackColor = .BackColor

End With

With oControlPixinfo

.Visible = True '显示

.BackStyle = 0

' .FontItalic = True

'.FontBold = True

.FontSize = 9

.ForeColor = HFF 'PixBackColor 'HFF

.Caption = "[" PixID "]" CStr(CInt(Mid$(Text1.Text, 1, InStr(Text1.Text, ",") - 1))) "," CInt(Mid$(Text1.Text, InStr(Text1.Text, ",") + 1, Len(Text1.Text)))

.Width = 1000

.Height = 255

.Left = dotx

.Top = doty - .Height

.AutoSize = ture

End With

Text1.Text = ""

Else

MsgBox "输入座标请介乎于" DPCound \ 2 "至" -1 * DPCound \ 2 "之间~~", , "错误"

Text1.Text = ""

End If

Else

MsgBox "座标请使用数字输入", , "错误"

Text1.Text = ""

End If

Else

MsgBox "输入的座标请使用英文逗号 , 进行分隔", , "错误"

Text1.Text = ""

End If

End Sub

Sub init()

If PixID 0 Then

If MsgBox("确实要清空所有标注点吗？", vbOKCancel + vbInformation + vbDefaultButton2 + vbMsgBoxSetForeground + vbSystemModal, "信息！") = vbOK Then

For i = 1 To PixID

Controls.Remove "Pix" i

Controls.Remove "Pixinfo" i

Next

PixID = 0

End If

End If

End Sub

Private Sub Text1_DblClick()

Call AddPix

End Sub

Private Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer)

If KeyCode = 13 Then

Call AddPix

End If

End Sub

Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

If Button = 2 Then

MsgBox "请输入整数座标(x,y) 中间用英文逗号分隔~~~,双击文本框或回车开始标注" vbCrLf "输入座标请介乎于" DPCound \ 2 "至" -1 * DPCound \ 2 "之间~~" vbCrLf "中键清空所有创建的座标", , "帮助"

End If

If Button = 4 Then

Call init

End If

End Sub

'好玩的东东

'****************************

'如果加上下面的就好罗

'定时设为500

'Dim a, b As Integer

'a = 14

'b = 14

'Private Sub Timer1_Timer()

'Text1.Text = a "," b

'a = a - 1

'b = b - 1

'Call Text1_KeyDown(13, 1)

'End Sub

'***************************

vb.net怎么自定义坐标系

scale(x1,y1)-(x2,y2)

你只要记住，这里的x1,y1是左上角的坐标，x2,y2是右下角的坐标，通过这两个点的坐标设定，就可以决定坐标原点的位置以及坐标轴的方向了，比如

Scale (-300,200)-(300,-200)

以上是把坐标原点设在窗体中心，x轴长600，方向从左到右，y轴长400，方向从下向上。

Scale (800,0)-(0,600)

以上是把坐标原点设在窗体右上角，x轴长800，方向从右到左，y轴长600，方向从上向下。

下面说坐标轴和原点的标示法：

假定自定义坐标设为：

Scale (-300, 200)-(300, -200)

则

Line (-300, 0)-(300, 0) '画x轴

Line (0, 200)-(0, -200) '画y轴

CurrentX = 290

CurrentY = -5

Print "x" '标示x轴

CurrentX = 5

CurrentY = 200

Print "y" '标示y轴

CurrentX = 5

CurrentY = -5

Print "0" '标示原点

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