C# - Linear Regression/trend Line With Ms Charting
Jan 4, 2011
I have data that are numbers both on x and y and have charted them using mschart 4.0
I need to add a trend line/linear regression to a bunch of points I have. The data on x and y are both numbers (no dates anywhere), for instance (33.4,45.1) would be a point.
In the samples I downloaded from the first link I found a linear regression sample in the code files forecasting.aspx(.cs), and I found this ms documentation
I have added a linear regression line to the chart with the following line (once all other data it setup etc)
Chart1.DataManipulator.FinancialFormula(FinancialFormula.Forecasting, parameters, "Input:Y", "Forecasting:Y,Range:Y,Range:Y2");
The problem with both of these is that they assume dates are used. I went ahead and implemented it anyway, but my regression line starts at around the x value of 20, and will go to an x value of the max x value of one of the points (almost 70) if I give the parameter Period a value of 700. But since it doesn't start at x value 0 I don't trust it is correct.
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Apr 15, 2011
I'm looking for a reference showing how to implement linear regression on data in VB2005
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Jul 6, 2009
The following code is executed when an entry in a ListBox is double-clicked:
[Code]...
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Apr 9, 2009
I'm trying to add a bargraph to one of my forms which will show a trend in dollars spent for certain projects (vs. the forecasted amounts). I wanted to know if there is a control or a function in VB.NET 2008 that I can use to build this graph in.... My only other thought is to use pictureboxes as bars (with background filled colors) and adjust their heights based on a ration or height to dollar amt... I don't mind doing this, but I wanted to know if there is a more intelligent way of building this... maybe some graph wizzard like in excel.
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Mar 2, 2011
A long time ago. before .Net net existed, I used an automated and a graphical tool. It seens to me that it was made by Microsoft. Is there a graphic regression testing tool that anyone knows of?
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Jan 20, 2009
I am doing regression testing using NUnit, WatiN and VB.net. What I am doing is opening an IE page, selecting some data, making a registration and then on view registration page testing the registration by assertion. Any good way to use try and catch on every assert. i am using it because if some assert fails it will stop executing the rest of the statement and quits without running rest of the tests. Now I have put try and catch on every assert and writing the fail message in log file.
For instance If I am checking for some airline reservation booking. After creating a booking, On view Booking Summary Page I am testing weather it is displaying cancel booking button or not. For this I am using the following code:
Try Assert.IsTrue(_internetExplorer.Button(Find.ById(New Regex("CBooking"))).Exists)
Catch ex As Exception d_logger.LogResultTextFile("Cancel Button does not Exist", True, False) End Try
I am checking this by running this in a loop for no of bookings created. I want to keep running the test even if in one booking it wont finds the button but keep checking for other bookings.
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Apr 1, 2010
This problem has been doing my head in all day and wouldn't mind a bit of advice. Basically I have a table in my db called tblTree which looks a bit like this :
TreeId, ParentId
1 0
2 0
3 2
Each row represent a folder.The TreeId is a unique Primary Key.The ParentId refers to the folder this belongs in so in the above example TreeId 3 is a folder created in the the folder represented by TreeId 2.The 0 in ParentId represents the root.How in Gods name am i supposed to create a folder structure using this table?
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Oct 25, 2011
I want to use VB for linear programming. Can any one tell me the best approach or give sample codes.
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Jan 18, 2010
I have a set of x, eg 288, data values. The user wants to fit a regression to a subset of this data, eg (2 - 200), then she wants to analyse within a subset of this fitted range, eg at 20 and 100. So, on my form are four Hor. Slider Bars, to set the lower and upper bounds to the fitting and the analysis. The two that set the lower bounds work fine. The two that set the upper bounds are getting corrupted somehow outside of my code and I do not know how to solve this problem. What happens is that when I click on the right hand arrow on the slider bar, the program runs through my function with the correct values whilst the arrow is down, goes out of my code and then immediately comes back into my code, but with the wrong value set into the Hor. Slider Bar fields that I am working with, eg the .Value field. The new value is always 9 below the maximum that it can be, but I can see no connection to this number.
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Feb 28, 2012
Basically a vertical progress bar with a user settable scale configurable either vertically or horizontally. Fancier looking the better.There's a lot of nice ones in commercial packages, but they come bundled with 80 other controls and generally have a price tag of several hundreds to thousands of dollars - which is a hard sell to a manager when you only need one control from the bundle.My other option is to embark on writing my own; something I don't look forward to and don't expect to look nearly as slick or "3d" as some of the things out there.
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Aug 5, 2011
I have a form that scales a background image. The form is painted 30 times a second (using Invalidate so it redraws the whole background image). When the window size is less than half my screen (1366x768), Task Manager reports that the program's CPU usage is 00. If I increase this a few pixels in width, all of a sudden the CPU usage jumps up to 50+. I can get up to about 606000 pixels in the client rectangle before it starts exhibiting this behavior
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Feb 26, 2011
i think the title says all what needs to be said, so i wanna make my mouse follow a random path from A to B, without straight lines..
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Mar 20, 2006
OverviewThe fastest way to read or write Xml documents in a linear fashion is to use the XmlTextReader and XmlTextWriter classes in the System.Xml namespace. If read- or write-only forward-only access is too limiting, however, the System.Xml.XmlDocument class provides the ability to easily modify existing documents (adding, removing, or modifying elements and / or attributes) and leverages the powerful search capabilities of XPath.
Getting StartedThe XmlDocument can load Xml from a string in memory, from a URL, or from a file path. There are two methods that enable this functionality: Load and LoadXml. To load a document from either a URL or file path, use the Load method. Following is an example of using the LoadXml method to load an Xml document from memory. (NOTE: we will be working with this particular document throughout this article)
[Code]...
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Nov 29, 2011
I have been learning and developing a software using VB for my company. I seem to have some issues with Chart function. [Code] Those 2 points will plot 2 datas (xval, finvall) & (xval, finvall2). Here is the thing. When I do the plotting, the starting points are always at (0, 0). That points come from the data point collector editor in the series properties. The question is: How do I plot data using the first value that I have? I don't want to start at (0, 0) but instead using (xval, finvall) & (xval, finvall2). I can't change the data point at run time. Many thanks!
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Jan 27, 2009
I'm looking for advice to make my code efficient in terms of execution speed and memory usage. Basically, how to lay out my objects. The program displays parts of several data series in bar- or line- charts, as well as calculated series based on these data series. The key user input will be to change what part of data series to look at, and that input should trigger instant chart update, with minimal lag.
[Code]...
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Oct 28, 2009
I need a VB.NET program to solve linear system with any number of equations
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Jun 7, 2012
Im doing a project with .Net 4.0, Visual Studio 2010 and Visual Basic .Net.I needed to add a Chart (the new one included by default in .Net 4.0) that represents temperatures evolving with time, so I added the drawing points in the elapsed event of the timer every second.The graph is doing somewhat ok, but I need another functionality, and this is, every time I stop the timer, save the graph in an excel (.XLS or .XLSX) file. As by default the chart provides with a collection of the type "System.Windows.Forms.DataVisualization.Charting.DataPointCollection", I would like to know if there is a way to create an xml and put the info of those collections in the excel file.I have looked around but I didn't find any similar example, last thing im thinking about is to use an iterative way to manually write in the excel file, but maybe its too much time consuming as the iteration will be of several thousands seconds.
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Jun 4, 2009
2.0 Framework.Our software does some measurement and then sends the output to our charting program. Right now it is taking 20-30 seconds for the results to print after our chart has sent the data to the printer since the printer is in sleep mode. What we are wanting to do is send a command to wake the printer at the end of our test, before it sends the results to the charting program, so the printer is (hopefully) done "waking up" by the time the chart program auto prints.
I have been looking around and haven't been able to find anything regarding this. The printer we are mainly using is a Brother HL 5250DN. I have contacted Brother but I have yet to hear anything back from them.
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Oct 19, 2010
The charting control has disappeared from my toolbox in VS2010. I know it was there when I upgraded to 2010 a few weeks ago. Both chart items are checked in the Choose Toolbox Items dialog but it doesn't show up in the toolbox. I'm pretty sure it was under the Data category. I tried resetting the toolbox but that didnt bring it back.
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May 26, 2012
Possible Duplicate: How to find web hosting that meets my requirements?
I was going to use the asp.net charting with Visual Studios 2008 but GoDaddy hosting does not support the charting cause they won't install the component.So what are my options for charting/graphs for data? Looking for free if possible.
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Jun 1, 2012
I try to achieve to paint a form with a gradient backcolor and overlap an image with transparency. This is possible? I want using a tile background image with transparent background and paint the background with a custom linear gradient.
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Feb 22, 2010
I'm using the MS Charting control, and can't find the way to create the translucent effect shown in their example piccy[url]...
Notice how the pie chart is translucent. How is this done with the chart control on a winform?
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Mar 3, 2010
I'm importing some data from MySQL into a VB.NET application with .NET charts. At the moment, the chart is plotting points by date, which means that when you zoom in, each major tick mark simply displays the date.It would be better to change these dates to times (hours) when one zooms in.Presumably there's a parameter to do this, but I can't find it.
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Jan 20, 2011
I have some code that produces a simple thermometer-like chart using an old Dundas charting component (ver 7).[code]...
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Feb 24, 2010
I'm only getting started with VB.Net, using VB Express 2008. Using the System.Data.SQLite wrapper, I need to read data off an SQLite database file, and chart data using basic bars, pies, lines, etc. Nothing fancy. Which component would you recommend, either open-source or affordable?
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Feb 3, 2010
why I can access System.Windows.Forms.DataVisualization.Charting.Utilities within C#, but not VB?
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Oct 14, 2011
what i need to do is open a txt file, read line by line, decode each line into an array and display. Now all works ok apart from one line.
sTextLine = objReader.ReadLine() <-- Value of string cannot be converted.
full code here
-------------
Dim objReader As New System.IO.StreamReader(sOpenFile.Text)
Dim sTextLine As New ArrayList()
Dim sText As String = ""
Dim i As Integer = 0
[code]....
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Jan 16, 2011
how to read text from a listbox line by line and put current line in a label?
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Dec 1, 2011
How would i go about reading a file Line by Line that within that line The values are delimited by " Example of the data:
"bob" "cat" "1243"
"steve" dog" "6789"
I've started this with this code but not sure how to go about the next stage:
Using MyReader As New _
Microsoft.VisualBasic.FileIO.TextFieldParser(My.Application.Info.DirectoryPath & "Records28112011.jd")
MyReader.TextFieldType = FileIO.FieldType.Delimited
[code]....
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Jul 5, 2010
I am trying to read in a TextBox line by line and take the first 7 characters of each line and output everything in another TextBox.This is what I have so far.
Dim line, lines() As String
lines = TextBox1.Text.Split(Environment.NewLine)
Dim i As Integer = 0
[code].....
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