I am looking for a way to find the moving average for customers over a 30 day period. However I was not able to find any sample VB code to help get me started. I did find this C# sample on Code Project but my attempts at conversion have not been successfull.
Does anybody have an existing VB class they would like to share or do you know of a sample that I could use to build my own?
I'm working on a function to return a exponential average and there are a lot of examples of exponential moving averages but they all start with a moving average that is just the mean as a lead in to calculating the continuing moving average. I needed just a exponential average of a value set. After Googling my Bing off I still haven't seen anything so here is my attempt at a basic exponential average. Is this correct? Are there any errors? I have seen some text about adding a smoothing value to change the curve of the exponential average but not how that would be implemented.
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I've just recently started using VB.Net 2010 Express edition and Windows 7 Home Premium x64 and I'm trying to write a simple multimedia player. My algorithm is: Simple mutlimedia player algorithm: 1. Create a form with three listboxes (one for accessible directories, one for accessible files, one for INACCESSIBLE directories and files), a drive combobox (for a list of drives). A textbox for holding the file extension. A 'start search' button to initiate a search for the files. 2. Form load populates the comboBox with a list of all logical drives that are of type fixed and are ready. 3. The user selects a drive to search using the comboxBox. 4. The user enters a file extension in a textbox. 5. The user presses the search button. 6. The computer searches all directories starting at root for any and all files matching the file extension. The allowed read access directories are added to a listbox of directories. The allowed read access filenames (i.e. the full path of each individual file) are added to a listbox of filenames. 7. Once the files listbox is populated, clicking on a file in the listbox passes the full path of the selected file to another form which is opened and shows the ID3 v1 tags of the file in textboxes and also the obligatory open, play, pause, stop and close buttons. Plus an Edit Ok button which gets enabled if the user edits the ID3 v1 tags. 8. The sequence for playing the file is: open, play (then any of pause, play, stop), close - note that close also stops the file first if it is currently playing then closes it. 9. The user closes the playing form and goes back to first form (i.e. the search form). 10. Closing the search form exits the application. Ok I can populate the drives combobox no problem. I can get a list of directories ok I can't (and believe me. I've tried 100's of ways) seem to get a filelist of all the files in all the directories [starting at root] that match the criteria - that's the bit I keep getting stuck on. I keep getting an unauthorized access exception. Trapping that exception doesn't seem to do anything useful as I can't continue the search loop (OR get the filename that is causing the exception and add it to the files listbbox) - and so can't get any filenames. BTW I can open, play, pause, stop and close any given mp3 file (with a correct path) no problem using the Win32 API.
I know I've d/l a couple of file listers but they are/seem highly complicated for what should be a very simple task. In good old DOS, it would take a line or two of using the DIR or Tree commands to find the files so I can't believe that it is so hard to do in VB.Net It seems [to me] that Directory.GetFiles(searchpattern, startdirectory, option searchFolderDepth) doesn't properly work due to the exception which arises from the unathourised exception event (and which it then seems to be impossible of getting the filepath and then continuing the loop by simple exception handler code).
I have a scientific datalogging program which I have been developing for a number of years now. We now need to add some functionality so that it produces a moving average of the data being gathered. I can create a queue of myDataClass to do the fifo buffer but I was wondering what the best way doing the averaging might be. As you can see from the code example below myDataClass contains various data structures some of which can be averaged and some which cannot (e.g. the string).
View 6 RepliesDoes anyone have a simple code for Moving and Renaming a Image File?
Here is an example of exactly what I need to do.
Ok let's presume the end user is Editing a Record named Mick's Milktart, the DataBase Table Field named ID (Primary Key) has a value of 237.The user clicks a button to add an Image to that Record.
An OpenFileDialog opened and an Image File named "NewImage.png" is selected by the user from "MyPictures".[code]...
I want to include an average in a column where the average ignores zero values in a report cell where the column may have
17
19
0
[code].....
I want 16, not 11 so (17 + 19 + 12 + 13 + 19) / 5 not (17 + 19 + 0 + 0 + 12 + 13 + 19) / 7 Something like this if it would work.
=SUM(Fields!fieldname.Value) / Count(iif(Fields!count_cycle_per_hour.Value >= 0,Fields!fieldname.Value,0))
Essentially just average everything in the column NOT a zero?
I put comments on the average output since I kept getting error messages about that. My out keeps saying:
Maximum value: 33
Minimum value: 33
what am I doing wrong?
Option Explicit On
Option Strict On
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I'm in a computer science class, and we are writing simple programs using Visual Basic 2008. I am really inept when it comes to this, as I have never done it before. I need to write a program that: "Asks the user for 5 numbers and computes the average. It then displays the average with an appropriate message before the average."
I have been really close with this, but I can't get the numbers to add up, then divide by 5, and display a pop up message.
I am trying to implement an Algorithm called "Diamond-Square Algorithm" I am having trouble ending it so that it retiurns the required result. So far I have the folloiwng.
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I have this:
Private m_PerformanceCounter As New _
System.Diagnostics.PerformanceCounter( _
"Processor", "% Processor Time", "_Total")
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Is there anyone can post a simple code using vb,that start building a simple games ?
View 2 RepliesTrying to make a simple browser with some simple addon's. What Ive done is setup a menu(forum) for the user to enter their email providers web address and it will save it in a xml file. When they click on the email link, it should load the email xml iformation and place that info in the tb_html.text and navigate. I keep getting a null exception and im not sure what going on here. Here is the code:
Browsers:
Private Sub btn_Email_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Email.Click
'Load Action
Dim SavedEmailObj As Storage
[code].....
I'll do my best to explain what the algorithm is supposed to do:There's a class 'Recipe'.ach Recipe can include other Recipes but cannot include itself or any other Recipe that includes it. So, a simple example is we have just two Recipes A & B.A,B,C(1) Recipe C Adds B(2) Recipe B Adds A(3) Recipe attempts to add C, but can't because of the relationship. C- B - A.
View 4 RepliesI'm Micah. Electrical/Electronic engineering 500 level student. I'm working on my final year project. please i need a code for the implementation of RSA algorithm in VB.NET. your assistance will be appreciated.
View 2 Repliesis the algorithm for VB editor released anywhere? because i'm trying to create my own editor that gives various options like Linking and self defined array functions (see below) such that one edit can update several others in various places, but i do still wish to have the auto formatting VB editor provides us with.an example of a self defined array function (count):we can transform this:
Public Class test
Private Shared number_of_methods As Integer = 2
Public Function get_number_of_methods_juz_an_example() As Integer
Return number_of_methods
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well of course instead of the code it would be just click and select (i wrote out the code in <> just to show what's happening)
i need some tutorial to implement BLS (Boneh-Lynn-Shacham) signature algorithm to create private key and public key to encrypt a message.I need tutorial to implement this in VB.NET.
View 1 RepliesI found an algorithm in C# that I need to convert to C. Problem is, I have never used C# so the syntax is really strange to me.
Implementation of Berlekamp-Massey algorithm for calculating linear complexity of binary sequence
s = byte array with binary sequence
returns Length of LFSR with smallest length which generates s
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I want create my own algorithm
View 1 RepliesHow would I be able to use my own Encryption Algorithm in my program such as encrypting text. I havn't been able to figure this out.
View 1 Repliescan you write an algorithm which can calculate 500 factorial.scientific symbol(mode) is unauthorized.Answer should be in String mode.
View 1 RepliesI am using VB.NET and I am trying to come up with some algorithm or some pseudo-code, or some VB.NET code that will let me do the following (hopefully I can explain this well):I have 2 collection objects, Cob1 and Cob2. These collection objects store objects that implement an interface called ICob. ICob has 3 properties. A boolean IsSelected property, a property called Length, which returns a TimeSpan, and a Rating property, which is a short integer.
OK, now Cob1 has about 100 objects stored in the collection and Cob2 is an empty collection. What I want to do is select objects from Cob1 and copy them over to Cob2. I want the following rules obeyed when selecting the objects though:
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So far, my friend has this, and we're trying to figure out how to get the code to tell convert F to C, and back. All we can use for input is (example:) 10,f and it will change it to 40,C.
Forgive me if this is a silly question....but I think back to my Comp. Sci. classes and I distinctly remember learning/being quizzed on several sorting algorithms and the corresponding 'Big O' notation.
Outside of the classroom though, I've never actually written code to sort. When I get results from a database, I use 'Order By'. Otherwise, I use a collection class that implements a sort. I have implemented IComparable to allow sorting; but I've never gone beyond that.Was sorting always just an academic pursuit for those of us who don't implement languages/frameworks? Or is it just that modern languages running on modern hardware make it a trivial detail to worry about?
Finally, when I call .Sort on a List(Of String), for example, what sort algorithm is being used under the hood?
I'm trying to convert the following algorithm from C# to VB.NET and the VB.NET I have is not producing the same results as my C# algorithm, can someone tell me where I've gone wrong in my conversion?
public static IEnumerable<T[]> Combinations<T>(this IEnumerable<T> elements, int k)
{
List<T[]> result = new List<T[]>();
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I need to encrypt vbs file using a cryptographic algorithm. I read about converting it into vbe file, but is there any other way to do it?
View 1 RepliesI have visual studio 2008, and we have been given specific tasks to carry our for our course, we have been asked to implement euclid's algorithm by using a while loop, doing so without the visual part of visual basic whatever that means an example of a question they gave was 1)HCF(88,26)=2 how I would go about doing this, as I am thoroughly confused, and deadlines are fast approaching.
View 3 RepliesI have some text files that contain
<img width="100" or
<img width="1400" or....
How could i replace all above with the following, since the image width is not static?
<img width="200"
i am working on project of using ant colony optimization and espcially on antnet algorithm but i have many problems in programming of this algorithm, and since i dont perfer using simulation for that purpose.
View 4 Repliesi want to implement bankers algorithm in vb.net how can i implement it
View 1 RepliesI am struggling to write a sorting algorithm that can sort characters in a word lexicographically (alphabetically) as follows
lexicographical sort of the word :- Contamination
lexicographically
Sorted Text Index
[code]....
write a pseudo code / or an implementation in C# or VB.NET of how I can do a lexicographical sort of the word above?