Plot A Graph From Values Calculated From A Database?
Apr 19, 2011
ive been struggling on this portion of my code for almost 3 days with no luck. i have a database containing a list of transactions (in this case, the product name, quantity and date of sale). I want to plot a graph for each product showing the amount sold each month for the past 12 months. The functions to calculate these values are working fine. but my problem is this:
points on picture box by several mouse down operation, perform either linear regression for best fit straight line for these points or best fit circular curve fitting for these points.User can use radio button to select either straight line or circular curve fitting. Plot the best fit graphic accordingly and save these graphic to a data file (result.txt).
i am a newbie to visual basic 2005. i have a excel file contain x value and y value of points.i wan to plot a graph using these few points.after that display the graph in the vb.How can i do that??
I need to be able to take an MP3 or WAV file and plot a graph of its waveform over time. Prefferably without playing it first. The representation doesn't have to be amazingly accurate as it's not for EQ purposes. I just need to pinpoint certain points in the MP3 / WAV when specific music / sounds etc occur (similar to the display in Windows Sound Recorder).
how I can go about that, or if it's even possible in VB 2005?
I'm currently trying to use ZedGraph to plot a graph based on some data I have extracted from a machine, with reference to a user entered "Frequency" range. I has to be a line graph, with Frequency on the X-axis, and extracted data on the Y-axis. There are 4 channels for the machine, but all data values extracted are close to each other, so multiple Y-axes are not needed. I'm also trying to do it within a class, and the graph should only be drawn when I click "Button3", otherwise there would be no data anyway and button2 extracts the data.
Below are my class (the graph code is at the bottom) and form1, which button3 should call the class, but I'm stuck for both the button interfacing and the class writing. I have also attached the output I get so you can have a look at what I need. Open it in Excel to see the format. The whole program is also attached as a text file if you prefer it that way.
I new in vb .net. Now doing the robot mapping project from the arduino serial port and VB 2010 as a GUI. The serial port can read the text from arduino sensor but how to plot the graph from all the sensor value? So when ultrasonic detect the distance will give the pixel or point. I using the picture box as a background grip map.
I'm just trying to create a graph where the user can input data into textboxes and then plot the data. I am attempting to use Zedgraph, but open to other suggestions. The program below creates a plot, but it won't update when the textboxes are updated.
Imports ZedGraph Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
I am attempting to teach myself visual basic and I cannot figure out how to send a calculated value (on a button click) into a one-dimension array and then recall the last five values in a message box when the user exits.
Here's what I have:
Public Class frmInvoiceTotal Dim totals(4) As Decimal Private Sub btnCalculate_Click(ByVal sender As System.Object,
I am working with a future value application and I am trying to display the calculated future values in a listbox. For instance, I input the monthly investment, the yearly interest rate and the number of years into textboxes and I want the application to list out the future value for each year until the number of years in which I entered is reached. I cannot figure out how to get the code to display the value after each year. I am trying to use the "mod" operator to display the value each time the 12th month comes around.[code]...
I am new to vb and I am required to plot a graph in vb. I need to get data from a text file to plot a polar graph of Wind Direction vs Wind Speed. But opening the file from a text file is in a string format, and when i tried to convert to a double, it gives the error:
I'm trying to learn vb .net. Below is my code, and all I want to do is display the calculated results in a summary. Whether it be a message box or a different form it really doesn't matter.
Public Class Form1 'Global Declarations. Const STEREOSYSTEM_Decimal As Decimal = 425.76D Const LEATHERINTIERIOR_Decimal As Decimal = 987.41D Const COMPUTERNAVIGATION_Decimal As Decimal = 1741.23D [Code] .....
I'm writing a time entry program to record when an employee checks in and when they check out.I'm struggling on the part where I need to calculate a time span (time out / time in). I am selecting the In Time, Out Time, and Total columns.I want it to take the Out Time subtract it from the In Time and place that value in the Total column.I have so far and have tried several variations of different updates but have had no luck.[code]I keep getting a syntax error in the UPDATE statment.I'm not very fluent with OleDB yet and I'm not sure if I'm doing the update correctly.I have no problem with OleDB and single UPDATES or single field updates but when I am updating multiple rows with different values.
I have invoice form bound to a bindingsource and bindingnavigator. In the form I have unit price, quantity and total textboxes. The total textbox text property is set to total.text = quantity.text * unitprice.text in the textChanged event of both quantity and unitprice text boxes. The result is displayed in the total textbox. But when i hit save button on the bindingnavigator it is set to null and not saved to database. [code]When I used msgbox to see the value of total textbox before bindingsource.endEdit() it is the correct value. but after the code bindingsource.endEdit() it is null. I checked the databinding property and it is correct. What is the problem.
I have created an array of 6 numbers which are randomly generated, I can create a graph using six randomly generated numbers, however what I want is to use the random values that are placed in the array to create my graph, I have enclosed the code that I have:
Private Sub btnGraph_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGraph.Click txtAns.Text = ""
I have just finished working on my database, basically it returns two values temperature and speed. i want to plot a graph of temperature against speed, with data from a database. also the data is not in order, would i need to order the data before it can be inputted into a graph.
I'd like to do something I thought was simple. All I'd like is to take the data from a connected database, then put those values into a scrolling line graph. Preferabley with 4 lines (taking information from separate tables) on the same graph. I've connected the database and set up a script to populate it with data, but that's as far as I go with graphs.
I've downloaded 'MSChart.exe', 'MSChart_VisalStudioAddOn.exe', ChartFXLiteNet' and others, yet none work. I've also followed a tutorial here on graphs, but it's for visual studio 2005, and I don't have the options required. I'm using Visual Studio 2008 with VB.NET.
I have used MSChart control and created line graph. when i move my mouse over the graph, i want to display X-axis value and Y-axis value in another label above the graph.
How to create a line graph in VB 2005? I will get the data from database and plot a line graph with the information i get from the database and display it out. I know i can use Microsoft chart control but i don't really know how to use that.
This isnt the first time i have posted about a graph, last time i was posting about which way i should do it, now that i have created the graph (by drawing individual lines) i was wondering what the easiest way to actually get data from a SQL database and output it as a line on a graph. here is a picture of what the graph looks like (bottom of the page) [URL]
I am building VB.NET application that takes data from text files that are exported from a legacy DOS program. These are written to a datatable and displayed in a datagridview. Right now my code simply loops through the datagridview and inserts the data into the database (SQL Server). There is a requirement now that the client number must be checked before the insert to see if it exists in the database. If it does, then the value of one field (tax rate) is checked against the value of the field in the datagridview. If there is a difference, then the rate is to be updated in the database and the data that was in the database is to be written to a history table for audit purposes. If the client number is not there, then we are to do the insert (which is already written). I want to know what is the most elegant and efficient solution for this problem.
I need to compare what is in the database table with what is in the datagridview, update the history table for records that exist, and then insert new records.
i have recently installed Visual Studio 2010 Professional and I am currently coding in VB. I am trying to display a bar graph (pulling from MS SQL database) for certain criteria, but I do not have a "Chart" option in my Toolbox section. I have a licensed software and do not know why the "Chart" option is not present.
I am working on an application that ties into a SQL database on the back end. Currently the main form contains a series of combo boxes (Graph type, data format, location, and customer), two date pickers, and a button to launch the selections in a new form. Everything works just fine except there are a couple of things I can't seem to accomplish.
Example Data:
[CODE]...........
Case Select (with commented out lines for variations attempted):
[CODE]..........
1) I would like to be able to use some sort of case statement to color the bars in my chart based on value. I have tried approaching this in a couple of different ways but neither of the options seem to work. First, I tried this (the If Not is used because depending on what values are passed to the stored procedure in SQL, different columns will be returned):
[CODE]..........
Only one series is created with this method, so I can see how/why a Select Case would set all bars the same color. I have also tried creating a series for each row in the returned dataset but it results in 22 bars of different colors, for each of the rows (484 bars):
[CODE]..........
So is there any way to modify the second set of code there to only select the value from the "Percent TMHB" cell that corresponds with Row(i), rather than ALL values from the "Percent TMHB" column for EACH Row(i)?
2) Since I am drawing/creating these graphs in a new window, is there any way to also create a new timer on the "newFrm" and have the tick refresh the data? I've struggled with this but I feel like it should be easy. Say someone chooses a "TMHB", "Percentage", "Chicago", "All" (Graph type, data format, location, customer) and launches the graph, which opens in a new window, then they want to do "TMHB", "Percentage", "LA", "All" and have both windows up, refreshing automatically throughout the day. Can I somehow store the SelectCommand.Parameters values in the new form/timer so that it will query the database again every 5 minutes?
Example code for the StoredProcedure and creating the new form:
If combo_GraphType.SelectedItem = "TMHB" Then Dim newFrm As New Form Dim newChart As New Chart
Public Sub CreateXml() Dim db As New MDataContext Dim Customers = <gallery columns="3" rows="3">
[code]....
Could i mix local values with the ones returned from the LINQ query...Something like the following?
Public Sub CreateXml(ByVal **Col** As String, ByVal **Row** As String) Dim db As New MDataContext Dim Customers = <gallery columns="& **Col** &" rows="& **Row** &">
i have data coming from sql server with two columns like total items, total packed items. Now in datagridview i want to show another column to calculate %age.Total Packed Items / Total Items Is it possible to add calculated column in datagridview?