How To Implement Linear Regression On Data

Apr 15, 2011

I'm looking for a reference showing how to implement linear regression on data in VB2005


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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Is There A Graphic Regression Testing Tool That Anyone Knows Of

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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Regression Testing - Try Catch In Assert Statement

Jan 20, 2009

I am doing regression testing using NUnit, WatiN and 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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VS 2005 : Generating A Folder Tree Using Regression?

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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Linear Programming With VB?

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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IDE :: Horizontal Slider Bars - Fit A Regression To A Subset Of Data

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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[2008] Linear Gauge Control?

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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Non-linear Performance In Scaled Background Images?

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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VS 2010 Make A Mouse Path From A To B Non-linear?

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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Write Xml Documents In A Linear Fashion Is To Use The XmlTextReader?

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)


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VB Program To Solve Linear System With Any Number Of Equations?

Oct 28, 2009

I need a VB.NET program to solve linear system with any number of equations

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Forms - Background Image Transparent Painted With Custom Linear Gradient

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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Mar 14, 2011

How to implement such a feature in

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Implement WCF In VB?

Apr 5, 2012

We have a application where we have implemented multithreading. We determined that we need to either implement .net remoting or WCF. After researching remoting in .NET on MSDN, Microsoft considers remoting legacy for .NET framework 4.0 and recommends using WCF instead. My question is: can we implement WCF functionality into our VB.NET application or do we need to rewrite the app from the ground up in WCF?

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Implement Threading In App?

Sep 1, 2010

I have a program that I would like to implement using Threading.I wand to load a form that takes a couple of minutes to open using threading.Here is my code

Imports System.Threading
Public Class frmAdjustments

Function LaunchForm() As Integer[code].....

I am new to .net programming and could use any suggestions you may have.  I'm trying to grasp the concept of multithreading apps and would like to have both my main form (Adjustments) and the (frmNewAdjustments) form to load concurrently.Here is the error I receive with the code above: Overload resolution failed because no accessible 'New' can be called with these arguments:

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.net - Implement VB With Statement In C#?

Sep 3, 2010

How would you create an extension method which enables me to do the following (warning: exteme pseudo-code)...

class FooBar
Int32 Foo { get; set; }
String Bar { get; set; }
new FooBar().With(fb => new Func<FooBar, Object>(instance =>


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C# - How To Implement Of A Generic In .net

Mar 13, 2011

This is just a Translation question. But how do you write a the following C# code in My problem is that i don't know how to rewrite the this part of the generic T. C# code i want to translate

public static void ShouldEqual<T>(this T actualValue, T expectedValue) {Assert.AreEqual(expectedValue, actualValue); }


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Aug 7, 2009

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C# - Implement A Bitboard In .NET?

Mar 9, 2012

My Questions are: Is is possible to implement a bitboard in Tutorial/Reference to do bitboard in VB?

C# answers are acceptable because it's not that hard to translate.

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C# - Implement The Equivalent Of SQL IN() Using .net?

Aug 4, 2010

In .net (c# or vb) expressions, how would you implement SQL's handy IN() functionality?i.e. value in (1, 2, 4, 7)rather than:

value = 1 or value = 2 or value = 4 or value = 7

There are obviously many ways, I'm looking for the most clean and simple!

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C# - When Should Implement IDisposable

Mar 12, 2010

What is the best practice for when to implement IDisposable? Is the best rule of thumb to implement it if you have one managed object in the class, or does it depend if the object was created in the class or just passed in? Should I also do it for classes with no managed objects at all?

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Can't Implement The Interface

Aug 7, 2009

I am trying to implement an interface defined in IDL, in a class here is the idl

interface IEmissaryRoot : IDispatch {
id(0x68030000), propget]
out, retval] IActivityCol** );


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DirectCast How To Implement

Jan 14, 2012

i am using code to the value textbox2.text in the report and using the code like below [code]the textbox2 take various values in run time but when i run the code it display only the final value intermediated values are not displayed the whole situation is as follows.[code]

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How To Implement A Regex

Aug 12, 2011

I would like to use regex for a txt file as follows. What I want to do is to get the whole text if CRC is other than 00000000. The content of the file below has 2 blocks of data below. And I should get the second one after the regex operation.


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How To Implement Blowfish

Jun 18, 2010

I guess Blowfish is not included in .net class to implement it,,there are any sample code.? ive already try but still have a trouble to encrypt data without padding. [code] the original source from schneier that implement with vb6 we can encrypt data with or without padding.its mean we can encrypt data in 1 block that contents less than 8 bytes.

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How To Implement Blowfish In VB 6

Feb 26, 2010

How to implement Blowfish in VB 6 and

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How To Implement DLLGetVer

Jun 19, 2010

how to implement DLLGetVer written in I currently have tried the following code but when I try the fucntion, I get Unable to find an entry point named 'DLLGetVersion' in DLL 'msi.dll'.


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How To Implement Dos Printing

Nov 23, 2010

how to implement dos printing from

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How To Implement Next Vbs Code in C#

May 31, 2010

How can I implement the next vbs code in C#:[code]

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How To Implement Truncate To A Row

Jun 22, 2010

[TEX]Hello[/TEX] How do i use truncate in vb 2008?my database its in Access and i want to implement a truncate table in vb but i don't know how to do it.

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How To Implement Typedef

Apr 22, 2010

Can anyone help me with a way to implement typedef in vb2010, because I see it helpfull way to define types.

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Jul 25, 2010

I'm trying to assign a datasource to a ComboBox control during runtime. When I do so, I get the attached message. [Code] I want to learn how to use an Interface. The error message is suggesting using an IList. How would I do this.

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Implement LinkedIN API By Using C#?

Jun 8, 2011

Is there any way to implement LinkedIN API by using C#,VB.NET.We need to call profile , companies ,Jobs etc API of linked in using mentioned technologies.

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Implement Map Function In .NET?

Feb 1, 2012

I am trying to implement map function in VB.NET and I have tried the below.

Function Map(a,f)
Dim i
for each i in a


But the above code is not working and saying alert is not declared.

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Implement Murmurhash3 In VB?

Mar 10, 2012

I'm trying to implement murmurhash3 in and trying to convert from this C# implementation first part of the function in c#

public static SqlInt32 MurmurHash3(SqlBinary data)
const UInt32 c1 = 0xcc9e2d51;
const UInt32 c2 = 0x1b873593;


Throws error Arithmetic operation resulted in an overflow.I'm Not sure how to do the Get four bytes from the input into an UInt32 part if that is the problem or is it related to something else since there are some differences in bitwise operations between C# and VB.

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Implement P2P In Studio?

Apr 8, 2011

I am creating a program that will send large files from a server to several clients periodically. I would like to use some sort of Torrent functionality, meaning that I want the clients to sync the information between each other as well as from the server. If client1 downloads part 1, client2 part 2 and so on, I want them to download the rest of the partial files from each other instead of the server. Are there any libraries for .net that can accomplish this? I do NOT want to use a third party tool like uTorrent, but write the actual functionality myself.

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Implement Threading In .net App?

Jun 8, 2011

I have a program that I would like to implement using Threading. I wand to load a form that takes a couple of minutes to open using threading.


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Way Of Implement Messageboxes

Feb 13, 2012

I've separated my viewmodel into a separate dll and it just feels wrong to put messagebox's there.

Care to suggest any good way of implementing messageboxes?

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Sep 7, 2011

I have a MenuStrip control and when I right clicked on it and selected "insert standard items", it created a few functions. There are a few options there that I would like to get working: Cut, Copy, Paste, Delete, and Select All. I presume that for what I want, I'd need to make my own classes for each function. (ie: Cut class, Copy class... etc.)

I would like to be able to do something similar to the example below:


Im doing this in On Windows 7 .

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Jul 3, 2009

First the requirements: By management requirements, I can't use open source code. I need the users to define their own formulas for a project. My users don't know how to code. The formulas need to be saved somehow, and being read later. I need to debug the formulas written, so I need to be able to see and understand them. The formulas used are quite specialized and specific (actuarial formulas). Adding new formulas (functionality) must be done in fast and maintainable way.


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Nov 24, 2006

I have a situation where I am defining an interface and then using that directly eg:Dim x as IWhatever = new implementationOfIWhatever()Which is fine, butmplementationOfIWhatever also implements IDispoable so I want to be able to do x.Dispose or ideally Using x but get the error that that this is not declared or must implement IDispoable as IWhatever of course doesn't define Dispose or implement IDispoable

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Feb 13, 2011

I am trying to figure out the best way to implement a certain part of my model.I have an entity named Customer which has CustomerLocations (1-*) which have SalesOrders (1-*) which have Invoices (1-*).I want to allow them to have multiple addresses (Billing and Shipping) per customer and per location. I want to store those values in the sales orders and invoices, not a foreign key, what if they delete one of their addresses later down the road.I have tried complex types, but then they can't have multiple, can they? And having an Address entity, customer --> address (1-*) is ok, but a bit clumsy. How would you have a collection of billing and shipping addresses.?

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Nov 30, 2011

I am working on building a texted based space game with .net I have a server and client where I am able to "move" around the map. The map is broken down by sectors, which each sector having a possibility of connecting to up to 8 other sectors around it (a grid with diagonal movement as well). This is stored in the sector class by an array listing the connecting sectors. Currently, all the sectors are stored in a List. When a move command is issued, the connecting sector array is checked and if the requested sector is found in the array, the new sector is loaded

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Mar 17, 2012

I've already asked this question on several forums, but without any good explanation of why the code above cannot be converted from C# to Visual Basic. The code is actually from this forum, written in C#. (the source)


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