I have imported a huge excel file into matlab. The file is a database with 5 columns and 175000 rows. I want the maximum value of every 24 rows of the third column.
can anyone help me plz?
I hope I got what you want right,
I believe you can do something like this:
(forgive me I'm not writing matlab coding)
col = 3
for i = 1 to number_of_rows
Add the element at (i, col) to a new array
i=i+23
end for
then fine the maximum value in the new array you created in the loop, hope this helps
i have column which contain data like :
Value 1\Value 2
Value 1\ Value 2\ Value 3
i don't know how many each rows have "\" and I need to split this data using SSIS Derived Column.
Could you help me?
The problem you're going to run into is that eventually you must define an upper limit to the number of columns, at least if you're going to use a Data Flow Task It does not support dynamic columns.
A script task or component will help you in the splitting of data. The String library has a Split method that takes user specified delimiters
I have a SSIS package where1 record (hard coded) flow through.
I have variable in DFT scope.
I assign value to variable using Row Count Transaformation.
The value should be 1 i verify it by using script component.
public override void PostExecute()
{
System.Windows.Forms.MessageBox.Show(ReadWriteVariables[0].Value.ToString());
base.PostExecute();
/*
Add your code here for postprocessing or remove if not needed
You can set read/write variables here, for example:
Variables.MyIntVar = 100
*/
}
I look for zero condition through condition in Conditional split transformation.
Strangely it satisfies equal to zero condition whrease I think it should have value 1. Even Messagebox through script component shows value 1.
what could be the reason? Are value in varible realize only towards end of DFT or Conditional Split has some problem reading correct value or something else which i am not able to think up?
The value for variable being assigned inside a data flow task can't be used in the split transformation or later in the Data Flow task . The values generally get populated once DFT gets completed .
Variable values does not update during the execution of Data Flow task
Even though you are able to see value 1 or set some other value to Variable from script transformation in post or pre execution events ,these values gets effected only after the execution of DFT
Hence the updated value can be used in precedence constraint or other tasks in control flow .
Read this article .
Alternatively you can use RANK Function as one of the columns, latter use Conditional split with max function to get the number of rows selected (in directly row count). Next you can use Copy column and remove RANK column before inserting into final destination. Hope this helps!
I have a text file with 5 columns and a variable amount of rows. What would be the easiest way to grab the first row of the text file and set 5 different variables in SSIS to the values of the 5 columns in the first row?
Define your five variables in the package, and one more for row_count.
Setup a Flat File Source.
Use Row Count component to count rows.
Use Conditional Split on row_count == 1.
Use Script Component to capture row data into variables.
I'm working on a rather complex report in Sql Server Reporting Services. My SP returns a dynamic number of columns each of which are dynamically named.
Basically think of a time keeping application. Each column that is dynamic represents a time bucket that time was charged to for that team. If no time was charged to that bucket for the period of time the report covers it doesn't show. Each bucket has its own identifier which i need to be the column headers.
I have an SP that returns this all. It does it by doing a bit of dynamic SQL with an exec statement (ugly i know but I'm on SQL 2000 so a PIVOT option wouldn't work)
I can have an indefinite number of buckets and any or all might show.
I found this - http://www.codeproject.com/KB/reporting-services/DynamicReport.aspx - which is helpful but in the example he has a finite number of columns and he just hides or shows them according to which ones have values. In my case i have a variable number of columns so somehow i need the report to add columns.
Any thoughts?
As long as you know a maximum number of columns, it's possible to do this after a fashion.
First, name the columns with a result from your query, so you can either pass it in to the query or derive it there. Second, just build out the report as if it had the maximum number of columns, and hide them if they are empty.
For example, I had to build a report that would report monthly sales numbers for up to a year, but the months weren't necessarily starting in January. I passed back the month name in one column, followed by the numbers for my report. On the .rdl, I built out 12 sets of columns, one for each possible month, and just used an expression to hide the column if it were empty. The result is the report appears to expand out to the number of columns needed.
Of course, it's not really dynamic in the sense that it can expand out as far as you need without knowing the upper bound.
This can be done. I did this and it works fine.
You don't have to know the maximum number of columns or show and hide columns in my approach. Use a matrix and modify your sp to return dynamic data to the structure mentioned in this blog post http://sonalimendis.blogspot.com/2011/07/dynamic-column-rdls.html
Build 2 related Datasets, first one for the report content, and the second one for the list of its column labels.
The Dataset of the report content must have a fixed number of columns and name. You can allocate some maximum number of columns.
In this example I have the first 2 columns as fixed, or always visible, and a maximum of 4 columns to be displayed by choice through a multivalued parameter, or depends on the query conditions. And as usual, we may have a total as well. So, it may look like this:
Fixed01, Fixed02, Dyna01, Dyna02, Dyna03, Dyna04, Total
The second Dataset with its values will look like this:
Name Label
---- -----
Dyna01 Label01
Dyna02 Label02
Dyna03 Label03
I have omitted the 4th Label to demonstrate that not all columns are being used by a certain query condition. Remember that both Datasets are meant to be related to the same query.
Now create a parameter named, say, #columns; populate its Available Values and Default Values with the second Dataset.
For each of those 4 dynamic columns, set the column visibility with the following expression:
=IIf(InStr(join(Parameters!columns.Value,","),"Dyna01"),false,true)
And for each of their column header Text Boxes, use the following expression:
=Lookup("Dyna01", Fields!Name.Value, Fields!Label.Value, "dsColumns")
As for the Total, here is the expression for its visibility:
= IIf(InStr(join(Parameters!columns.Value, ","), "Dyna01"), false, true)
AndAlso IIf(InStr(join(Parameters!columns.Value, ","), "Dyna02"), false, true)
AndAlso IIf(InStr(join(Parameters!columns.Value, ","), "Dyna03"), false, true)
AndAlso IIf(InStr(join(Parameters!columns.Value, ","), "Dyna04"), false, true)
And here is for its values:
= IIf(InStr(join(Parameters!columns.Value, ","), "Dyna01"), Fields!C01.Value, 0)
+ IIf(InStr(join(Parameters!columns.Value, ","), "Dyna02"), Fields!C02.Value, 0)
+ IIf(InStr(join(Parameters!columns.Value, ","), "Dyna03"), Fields!C03.Value, 0)
+ IIf(InStr(join(Parameters!columns.Value, ","), "Dyna04"), Fields!C04.Value, 0)
That's all, hope it helps.
Bonus, that second Dataset, dsColumns, can also hold other column attributes, such as: color, width, fonts, etc.
I think the best way to do it is add all the columns in your table and edit the visibility property of it with the help of arguments that you get from your SP..this will solve the purpose of dynamic column but when viewing the report you will get a lot of white-space which you can solve with SSRS - Keep a table the same width when hiding columns dynamically? and your report will be ready
I've had the need to do this in the past and the conclusion I came to is "you can't", however I'm not positive about that. If you find a solution, I'd love to hear about it.
An issue that comes to mind is that you need to define the report using the names of the columns that you're going to get back from the stored proc, and if you don't know those names or how many there are, how can you define the report?
The only idea I had on how to do this is to dynamically create the report definition (.rdl file) via C#, but at the time, I wasn't able to find an MS API for doing so, and I doubt one exists now. I found an open source one, but I didn't pursue that route.