Find Average Value Of ArrayList Items
Jan 28, 2009I've got an arrayList full of ints, how do i find the average value in it?
View 2 RepliesI've got an arrayList full of ints, how do i find the average value in it?
View 2 RepliesI am trying to make an application that would use an inputbox that will enter numbers until the user enters -1 after the numbers were entered and the user entered -1 the numbers would display within the listbox and the average would be in a label displaying "The average number is" & averagenumber in my current application I have it from 1-5 my question is how would i allow it to enter an unknown amount of numbers and create an counter for it.
Public Class Form1
Private counter As Integer
Private item As Double
Private average As Double
Private numbers As Double
[Code] .....
Heres my code so far:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Subject As Integer
Subject = InputBox("How many products")
[code]...
Only "0" appears in the TextBox2 and not the average number.
I want to create a program that will let the user input a number and it will go to listbox1. Then listbox2 and 3 will do some algorithms that i made. The only problem that i'm encountering is the average of listbox3.
I have 3 textbox, 1 button, 3 listboxes.the names of the objects is default except to textbox2 and textbox3, I change their name to AveTTTextbox and AveWTTextbox.I use AveTTTextbox to get the output of the average for listbox2 and AveWTTextbox to get the average output of listbox3.[code]....
What is the formula in VB for finding the average of two integers?I know in normal math it is e.g. (4 + 6) / 2 it only needs to be the average of two values.
View 5 RepliesI am tring to find the Average Temp for the days entered,and I am not sure how to do this.Here is the code I have so far:
Public Class Form1
Dim Temp(6) As Single
[code].....
i created an array of 100 cells, and the user inputs the value into them now i have to find the average of the array but not all of the cells are used how do i go to the last value, instead of the last cell? [code]
View 1 RepliesI'm having a little problem with my code as it follows, im trying to find the average # between 1-10 that is selected in my listbox but i'm having problems with my counter that divides it by, as a result i am only getting the number selected Goal is to select a value in listbox and find average based on what is selected and how many values were selected
Public Class Form1
Private Sub xRecordScoreButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles xRecordScoreButton.Click
[Code].....
I tried the following code:
Dim T5NHCEDCavg As Double
qry = From employee In empList
Where employee.HCEDC = False And employee.X5 = False _
Select employee.DCFSA
T5NHCEDCavg = qry.Average
But I'm getting a design-time error that says "Overload resolution failed because no accessible 'Average' accepts this number of arguments." I realize that I'm missing an overload here, but I'm not sure what to use or how to do this. I'm pretty new to LINQ. I've got a dataset in memory that I'm querying, and there is a double-precision property DCFSA, of which I'm trying to get the average based on my query above.
Basically I need to remove Listbox1 items that are less then average, but its giving me:
System.ArgumentOutOfRangeException was unhandled
Message=InvalidArgument=Value of '9' is not valid for 'index'. [Code]
I have a table called tblComparison - this table has the following columns[code]...
Once the averages for each column are created it needs to save them to tblMonthlyComparison - again the column names in this table are the same so in the fldDate column the program needs to enter 31/12/2011. In fldAverage of this table what we do is take the average that we found above for each column then plus them together and divide them by 5.
Anyone can give the coding for finding the longest & average length?(displayed in a messagebox)
View 1 RepliesI was working on some code in VB.NET 2008 and somehow got a bunch of new functions to pop up in intellisense on a datarow array. I saw find, findfirst, sort, average, and lots more. They had an icon next to them in intellisense when I saw them. Then I went and changed some of the code and now I can't get them to come back. I have used 2005 and 2003 for a long time, but still pretty new to 2008.
View 1 RepliesHow can I find a listbox average removing the 2 lowest number? I tried
DimintSmall
AsInteger
intSmall = lstGrades.Items.Item(0)
ForEachItem
AsIntegerInlstGrades.Items
IfItem < intSmall
Then
intSmall = Item
EndIf
Next
lstGrades.SelectedItem = intSmall
I cant select or remove it
I am new to VB and need to make a program that does the following:Write a VB.Net program that allows users to enter a series of numbers(separated by a comma) in a text box called series. When the users clicks the command button called Average, the program extracts the number one by one from the series and calculates the average, and outputs the average onto a textbox called Result.I understand how to get it to do the average, but how can I make the program count the numbers that I input and then divided by the sum? Also, how would i get it started.
View 2 RepliesThis is bugging (my head is now switched off).I have two array's, one populated with dynamic elements and the other with static values. I am trying to filter out the values that i dont want from one of the arrays:
Dim arrFormItems As New ArrayList
arrFormItems.AddRange(arrSplitValues)
Dim arrItemsRemove As New ArrayList
[code]....
No matter what i do, i cant filter out the values. Tried the compare method as well..
I have created an ArrayList with items in my Order.aspx.vb. I pass these on to my bllOrder, which passes it on to my dalOrder.
Order.aspx.vb
Dim item As RepeaterItem
For Each item In rptProductList.Items
[code]....
I have to check duplicate records in ArrayList. In ArrayList each item should have atleast 2 times before insert new Item. Per example
Example 1:
AL(0) = '1'
AL(1) = '1'
AL(2) = '2'
[Code]....
Method has to return = 'false', because '2' has 1 time in the list. So I dont
want insert '3' in ArrayList and return false.
having trouble only adding the checkboxstatus's that are checked to the gridview.
[code]...
I have
Public ReadOnly Property StaffMembers() As ArrayList()
Get
Dim index As Integer
Return vStaffMembers(index)
End Get
End Property
I develop an application in vb.net and mysql server for data storage. I have a problem in my database I have something like 5000 codes stored like code, description, quantity, price, firm. I have a function to extract all the codes from database , it takes about 4,4269 ms to extract all 5000 codes with description and everything... in an arraylist. When I want to put all codes from arraylist in a textbox autocomplete, it took about 2305,400 ms and I think this is a big problem the function to put in textbox autocomplete all the items from arraylist:
Code Snippet:
Public Sub PopuleazaTextBoxDinListaCoduri(ByVal txtbox As TextBox, ByVal list As ArrayList)
txtbox.AutoCompleteMode = AutoCompleteMode.SuggestAppend
txtbox.AutoCompleteSource = AutoCompleteSource.CustomSource
Dim valoare
For Each valoare In list
txtbox.AutoCompleteCustomSource.Add(valoare)
Next
end Sub
This is one item from arraylist extracted from database in this format :
code4993 ->description of code4993(3 buc X 234 lei)
I am trying to program a noise reduction algorithm that works with a set of datapoints in a VB.NET DataTable after being helped with my other question. Basically, I want to take two integers, a coordinate value (yCoord for example) and a threshold smoothing value (NoiseThresh), and take the average of the values in the range of (yCoord - NoiseThresh, yCoord + NoiseThresh) and store that number into an array. I'd repeat that process for each column (in this example) and end up with a one-dimensional array of average values. My questions are:
1) Did anything I just say make any sense ;), and
2) Can anyone help me with the code? I've got very little experience working with databases.
[Code]...
I don't want check if an item with a value exists in the arraylist,I want to know the best code for performance to get how many occurrences of the same item with the same value exists in an arraylist.
View 2 RepliesWhen I try to set the total number of items in my arraylist as an integer I get this error:
[Code]...
I need to know how to save listbox items into ArrayList And restoring these items back from Arraylist into Listbox I tried this code but it returns Null Error Exception
[Code]...
I am trying to count how many items are in an ArrayList and then save that into a Label variable that is updated each time an item's barcode is scanned.Information about the code below:rejectedList is the ArrayList that contains rejected parts.RejectedPartsNumberLabel is the label I am trying to update with the count from the ArrayList
Public Shared Function isFault(ByRef code As String) As Boolean
rejectedList.Add(code)
RejectedPartsNumberLabel.Text = rejectedList.Count
Return (code.Length = 7 And IsNumeric(Mid(code, 1, 1))) Or (code.Length = 4 And Mid(code, 1, 2) = "NC")
End Function
I have 6 array lists and I would like to know which one is the longest without using a bunch of IF STATEMENTS."if arraylist.count > anotherlist.count Then...." <- Anyway to do this other than this?
Examples in VB.net or C#.Net (4.0) would be helpfull.
arraylist1.count
arraylist2.count
arraylist3.count
arraylist4.count
arraylist5.count
arraylist6.count
DIM longest As integer = the longest arraylist should be stored in this variable.
I've got some code that creates a list of AD groups that the user is a member of, with the intention of saying 'if user is a member of GroupX then allow admin access, if not allow basic access'.
I was using a StringCollection to store this list of Groups, and intended to use the Contains method to test for membership of my admin group, but the problem is that this method only compares the full string - but my AD groups values are formatted as cn=GroupX, etc....
I want to be easily able to determine if a particular substring (i.e. 'GroupX') appears in the list of groups. I could always iterate through the groups check each for a substring representing my AD group name, but I'm more interested in finding out if there is a 'better' way.
Clearly there are a number of repositories for the list of Groups, and it appears that Generics (List(Of String)) are more commonly preferred (which I may well implement anyway) but there is no in-built means of checking for a substring using this method either.
I've settled on using a List(Of), and I've borrowed from Dan's code to iterate through the list.
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'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.
[Code]...