I am trying to make a program to calculate the roots of a polynomial equation using the bisection method. I have designed the program so the user input a range of x values (x1 and x2) to solve for the root. When I debug the program I keep getting zero for the root. I know there must be something wrong the way I have my loop setup that keeps giving me a zero root. Here is what I have so far
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim x1 As Double
Dim x2 As Double
and that removes everything, but how, or it is even possible, to just remove children and keep the parents. I added the root nodes in the properties window and built my code around those, but clearing also removes them. Then of course that makes the code error as it can't find the code when I re populate the treeview.
Public Class form1 Inherits System.Windows.Forms.Form Private Sub cmdCalc_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles
[CODE]..........
This is my code for solving the quadratic equation..you input an a,b and c value and it finds the roots but i dont know how to graph it.
i cant seem to figure out where i am going wrong with this. im new to programming and havent really ran into many problems yet but this one has me baffled. i need to write a program to compute the roots of a quadratic i have my code and i am not getting any errors problem is i must check that the a value is nonzero so when i set my if block and use "if a = 0" and then display message it seems that it doesnt pass the values on to the else when a does not = 0.
I'm working on a calculator. So far I've made it so you can type in an equation with as many numbers as you want like 5+6-12*3/4 and it can solve it. My main problem now though is that it's solving the problem left to right instead of using PEMDAS. For example 2+6*2 should = 14 but when I type it in it will give me 16. My calculator isn't using parenthesis or exponents so I just want to put the multiplication, division, addition and subtraction in order when solving.Could a more experienced coder give me some pseudocode to make this possible please? So far for the calc I've been using regex a lot. Is there a way to achieve this without regex?
I have to calculate values of several equations in an application. For example, one these equations could be:
d = a + b*z + c*z (this is what is being displayed to the user, assume that 'a', 'b' and 'c' are provided as textboxes, assume that z is a hardcoded value for now)
Now, the user could enter a=1.5, b= -0.5 and c = -0.6 (or even 'a' could be negative). So, I just tried a sample code for simple values but to no avail...
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click Dim val1, val2, val3_calculated, first, second As String first = "8" second = "3" Dim arr(10) As String [Code] .....
Error: But it throws an error saying that I am not using any databind control.
Concerns: First of all, is it necessary to use this "eval" operator in here? Is there any way to keep "-0.5" with the sign in asp.net using vb?
I am working on an assignment for Visual Basic, trying to write a program that will enable a user to enter a number and have it display that number and show in a listbox how it would multiply with numbers 1 through 12. An example of this is:
Is there a way to create new mathematical equations at runtime? Obviously you can pass new variables to a given equation, but I need to make a new equation altogether (then give it variables).
Similar to using VAL(a$) to return the numerical value of a string, is there a function for returning the solution of an equation that is user-typed into a textbox? For instance, user types F$=(a+b*x)/(c*x^2-d*x^3) where the variables of the equation are either pulled from a textbox or derived within the code. I am looking for something like F=Solve(F$).
I found a great way to get the equations of calculations from application to Microsoft word file with MimeTex here-[URL]
But unfortunelly the code is only for Microsoft Visual Studio Solution under the Eq2ImgWinForms folder, but I use on my application Visual Basic language (Visual Basic 2008 Express Edition).
how could I use the same thing on my application with Visual Basic?
Due to the way I currently have it setup, the calculations are not being excecuted properly. I've been tweaking for a while and haven't gotten it yet. I think the problem is that certain equations are being done before certain terms are defined. If I click the calculate button multiple times, it works fine, but I need it to function on the first click.
Take a look:
Public Class frmford Dim Make, Model, InitialPrice, Options, AirConditioningTax, GST, PST, Total, Subtotal, APR, Months, RoofRack, SunRoof, SideAirBags, TintedGlass, RearSpoiler, GPS, PowerLocks, FreightAndPDI, AirConditioning As Single
I've made a fairly good Windows form application to solve quadratic equations, but I am having a hard time understanding the publication process microsoft uses in Visual Studio. I'd like to distribute my programm as freeware on my blog.
At the moment I'm in the process of building a class that can handle more advanced mathematical equations and processes. Essentially my end goal is to to have my class capable of processing anything you'd learn in Elementary Algebra through College Algebra. So far I am able to multiply monomials and order polynomials.. However for the most part the equations in questioned being processed have to be in correct form. IE Point-Slope Form, Y-Intercept Form, etc etc. I'm just curious as to how I can go about "validating an equation type by it's current form".
My EmpTable is in SQLserver & Data entry using Visual Basic 2010 "List format" on Windows form.Sir my requirement, if I enter (Date of Birth) in DOB column the Age should display on the same form in Textbox.
In my vb.net winform application, I am moving the file from one folder to another. I need to store the datetimevalue when the transfer has been done. Later I need to show this DateTime value in my Grid. Here is the code i have written, but not able to store the datetime value.
In vb.net I have control named checkbox1 that I can see at dropdown menu in properties tab. but in designer I am not able to locate it... Also when I am selecting CheckBox1 from properties' dropdown menu, no checkbox in designer gets highlighted.... How to find that control in designer?
I have to provide a client with a method to retrieve data from an Audiometer. The equipment is discontinued, but they have six of these and are used every work day. Using port monitoring and the DUMP command on the peripheral I was able to read the data and save to file. Now my challenge is decoding each line. It appears that only a section of the string is not in plain values.I added the pipe separators for clarity. I have determined those columns are: EMPID | DateTime | TechID | Results | ResultType = Test.[code]
I have been finding a VB, or C# or C++ Dll injector for a long time. Ive decided to make one. So in VB i went to toolbar and found "Process" and i didnt know what to do after. how to make one (dont post code). Ive tried using the "GetProcessByID" thing but dont work.
I'm looking to take a screen shot with my program and try to find an image inside of it. Is this possible?In other words, I am trying to find an image inside of a larger image. It would be great if it could be a screen shot of just the webbrowser form.
I can't find out how to find and open the program wow.exe using VB.
I can get it to open mine but it can't open other peoples they get errors when they try, I have xp and the Vista and other people can't get it to open theirs so I need to know how to find the file then open it.
The code I'm using is this:
Private Sub Play_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Play.Click Dim installpath As String = String.Empty
I have some code that generates 15 random numbers between 1 and 100 and prints the 15 numbers in a listbox. I want to be able to find the max and min numbers in that list. How would I go about finding those values? I'm new to VB so a solution involving basic string/array manipulation would be preferred.
I am trying to find the name of the first worksheet in excel. I can get the list of sheets, but i need to know which on is the first one in the workbook. using vs 2010 and office 2007
I am trying to run some code on Page_PreRender but only want it to run on hyperlinks within a certain DIV. What the code does is change the colour of a hyperlink if the NavigateUrl = the URL of the page the user is on. I have some code that works but it changes the colour of every link on the page that matches when I only want it to happen within a certain div.
I have the following Leak situation in a VB.NET (.NET2) application: a form - DetailTache (TaskDetails) - in my MDI application is not garbage collected is not collected ofter open/close.
EDIT: Result search from projet of WinComboRowSelected Event. There are 3 usages of this word in application:
Declaration in Class WinCombo: Event WinComboRowSelected(ByVal sender... (only one) Raising: RaiseEvent WinComboRowSelected(sender, (3 raisings) Usage: ...e As Keolis.ctlWinCombo.WinCombo.WinComboRowSelectedEventArgs) Handles cmbProduit1.WinComboRowSelected (multiple handles).
In a VB application I am building, I need to launch Outlook. Obviously, on every computer the path to Outlook will not be the same. Thus, I need to know how to find the path of Outlook on the user's computer before I Shell("path"). How would I do this?
I need my published vb 2008 application to open a helpfile that I wrote. It is a simple .txt-file and this piece of code does the trick as long as the program is not published because I already know where I placed the Helpfile:
After it is published on another pc, the helpfile is not on the root of the c-drive but in the application folder of the program. However, I can not know where the path to the program folder of someone else's pc is. It all depends on where they decide to place the program when they install, right?
It seems I need to replace this little: "C:Helpfile.txt" with some code that searches all the drives and directories and/or points directly to the Helpfile's placement - i.e. the parent directory of the program.
I need my published vb 2008 application to open a helpfile that I wrote. It is a simple .txt-file and this piece of code does the trick as long as the program is not published because I already know where I placed the Helpfile:
After it is published on another pc, the helpfile is not on the root of the c-drive but in the application folder of the program. However, I can not know where the path to the program folder of someone else's pc is. It all depends on where they decide to place the program when they install, right?
It seems I need to replace this little: "C:Helpfile.txt" with some code that searches all the drives and directories and/or points directly to the Helpfile's placement - i.e. the parent directory of the program.
