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by: John Hunter |
last post by:
I have a largish data set (1000 observations x 100 floating point
variables), and some of the of the data are missing. I want to try a
variety of clustering, neural network, etc, algorithms on the data,
and to keep life simple I want to reduce the dimensions of the matrix
so that I have no missing values, since not all the algorithms are
able to handle them and there is sufficient redundancy in the
variables that I can afford to lose...
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by: Dean |
last post by:
I want to build query to return how many rows are in this query:
select distinct c1, c2 from t1
But SQL won't accept this syntax:
select count (distinct c1, c2) from t1
Does someone know how to count multiple distinct columns? Thanks.
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by: Joe |
last post by:
Hi All,
I am new to using the Access DB and I need some help if someone
is able to give it to me. What I want to do is get the names of
the columns of certain tables. Not the data in the table but the
table column names.
I've seen other posts that suggest using the SQL command DESCRIBE
but I can't get it to work for some reason. Other posts have code
samples but they're written in VB which I am not familiar with. I
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by: Gunjan Garg |
last post by:
Hello All,
I am working to create a generic datagrid which accepts a
datasource(ListData - This is our own datatype) and depending on the calling
program customizes itself for sorting, paginantion or accepting the add and
remove item events.
What i am observing is that none of the vents are happening... (Sort, page,
or item). I am sure I am missing something basic here... Need help... Thanks
much
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by: |
last post by:
I wrote a class in VB.NET to export the contents of a datagrid to Excel. It
works perfectly on my machine, but it fails on my customers' PCs that have
identical versions of Win XP (SP1) and Excel (SP1) installed.
The error is:
System.Runtime.InteropServices.COMException(0x800A03EC): Exception from
HRESULT: 0x800A03EC.
at Microsoft.Office.Interop.Excel._Worksheet.Paste(Object Destination,
Object Link)
at...
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by: dallasfreeman |
last post by:
I'm looking at a quick way to get results that are displayed as rows to
display as columns.
I have three tables:-
- The Questions for the survey
- The Results of the survey (Columns are listed as question numbers)
- The Survey Extra Results (As additional questions can be listed into
the Questions table, has 3 columns (a link/id to the survey id, a
link/id to the question id, and the answer the user gave).
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by: macupryk |
last post by:
I am not sure how to get a column from a datatable, I cannot use foreach.
DataColumn dataColumn = DataColumn TEXTDT.Columns.ColumnName.Trim();
if (rows < TEXTDT.Rows.Count) // this will prevent rows to exceed number of rows in TEXTDT
{
// Insert each answer
DataColumn dataColumn = DataColumn TEXTDT.Columns.ColumnName.Trim();
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by: Mina Patel |
last post by:
Hi trying to find the number of duplicate tuples/records in table based on multiple columns ie.
select count(distinct list multiple column key )
from x
where date = y
HAVING ( COUNT(multiple column key) > 1 )
doesn't seem to work....any tips? thanks
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by: k4 |
last post by:
I have a database that contains a column for UnitName , BeginDate and
EndDate.
I want to pass two parameters (@BeginDate and @EndDate) and retrieve a
table of values
that include UnitName along with Counts for each UnitName.
SELECT UnitName, COUNT(BeginDate) AS Start
(SELECT COUNT(EndDate) AS Finish WHERE EndDate BETWEEN @BeginDate AND
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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