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R is a programming language and environment used primarily for statistical data analysis.

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The process of ML is comparable to data processing. Both systems search through information to appear for patterns. However, rather than extracting information for human comprehension as just in case of knowledge mining, ML uses that information to discover trends in data and alter program actions.
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Simplify Active Directory Administration
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Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

All, I am preparing for MFE (financial engineering). I could not thin of any other forum where i could seek help for clearing my doubts on financial products.

Dear experts, is my below understanding correct?

Is  r>-1  coming from this statement?

&&&1 + r&&&

if 1+r>0, then r>-1
*****

Extract from Stochastic Calculus for Finance 1

We introduce also an interest rate 1^n. One dollar invested in the money

market at time zero will yield 1 + r dollars at time one. Conversely, one dollar

borrowed from the money market at time zero will result in a debt of &&&1 + r&&&

at time one. In particular, the interest rate for borrowing is the same as the

interest rate for investing. It is almost always true that r >= 0, and this is

the case to keep in mind. However, the mathematics we develop requires only

that r > -1.

Kindly guide
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I need to execute a substring function on each row of a single column dataframe in R Studio, then assign that value to a new dataframe.
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hi,

Anyone know how to scale out R server/service in MS SQL 2016 and later?
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Trying to run

        Dim RetVal As Long
        RetVal = Shell("for %%i in (C D E F G H I J K L M N O P Q R S T U V W X Y Z) DO @if exist %%i: dir %%i:\*.* /s /b >E:\zzz\Zip-Bak\DayBkUp\DirectoryListHistory\%%i.txt")



Get error run time error 53 file not found?

It runs fine in a dos batch file

Trying to create a series of text files with a list of all files on each drive on my computer

Thanks
DIR-ALL-Drives.txt
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Enabling R commands on T-SQL of MS SQL Server
I have installed Microsoft SQL server 2017 and SQL server management studio on my laptop computer with windows 10 Professional.  I am able to connect to the database from management studio.  I have also installed R (version 3.5.0 (The R foundation for Statistical Computing).
I learnt that from SQL server 2016 onwards, MS SQL server permits R commands on T-SQL.
I am familiar with both T-SQL and R commands.
I want to know how to enable execution of R commands on T-SQL.
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Hello,
I'm trying to pass a value to a List, but I get an error Cannot implicitly convert System.Collections.Generic.List<char> to System.Collections.Generic.List<string>.
So, here's my code...
public List<string> NomeContrato { get; set; }

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BindingSource bs = new BindingSource();
            bs.DataSource = LoadContratos();
            var editForm = new Concelhos_Edit();
            var editFormModel = new Info();
            editFormModel.Id = concelhos_datagrid.CurrentRow.Cells[0].Value.ToString();
            var _nomeContrato = contratosdt.AsEnumerable().FirstOrDefault(a => a.Field<int>("IdContrato") == ((DataRowView)bs.Current).Row.Field<int>("IdContrato")).Field<string>("Designacao");
            editFormModel.NomeContrato = _nomeContrato.ToList(); //--> Here's where the code breaks and get Error!

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Changing this
public List<string> NomeContrato { get; set; }

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to this
public List<char> NomeContrato { get; set; }

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, I get my Combobox with one letter per line, like this...
W
o
r
l
d

Any help?
Thanks.
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I would like to perform fractal analysis on a financial series (stock exchange index). What shall I use (prices or log returns) for calculating fractal dimension, Hurst Exponent, for performing R/S Analysis and for predictions? Are there R functions that calculate all of these immediately? Are there any things I need to take care of when analyzing the index? Thank you in advance!
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First of all I am doing a program kinda simple long program, here is the full details:

The P-v-T relation for real gases can take many forms. The simplest relations are the ideal gas equation and the Van der Waals equation. These relations are to be applied to superheated steam. The file “pvt.txt” contains the P-v-T data of superheated steam (10 – 800 kPa) for the temperature range of 200 oC through 1200 oC, obtained from the steam tables.

Write a C program to read the steam table data “pvt.txt”. In the C program, estimate the density of steam for the pressure range 10 through 800 kPa, and temperature range 200 oC through 1200 oC,

(1) Using the ideal-gas relation: m3/kg where R = 0.4615 kJ/kgK, T is temperature [K] and P is pressure [kPa].

(2) Using the Van der Waals equation:

where R = 0.4615 kJ/kgK, T is temperature [K] and P is pressure [kPa]. The constants are obtained from and where Pcr = 22060 kPa and Tcr = 647.1 K.

In each case, calculate the resulting percentage error of the estimated density as follows: Error = x 100% Submit a report which must include: 1. Introduction, algorithm or flowchart, the C program, and the density from steam table. 2. The estimated density table when using the ideal gas equation. 3. The percentage error table when using the ideal gas equation. 4. The estimated density table when using the Van der Waals equation. 5. The percentage error table when using the Van der Waals equation. 6. Discussion and conclusion. Note: Density…
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Please help i want the image to be in canny edge n perform fuzzy logic with this code

img1=imread('F:\Matlab Project\7 sem\currency\10.jpg')




Igray = 0.2989*img4(:,:,1)+0.5870*img4(:,:,2)+0.1140*img4(:,:,3);
%Igray1=edge(Igray,'Canny');
%figure
%image(Igray,'CDataMapping','scaled');
%colormap('gray')
%title('Input Image in Grayscale')

%Convert Image to Double-Precision Data
I = double(Igray);


%Scaling the factor
classType = class(Igray);
scalingFactor = double(intmax(classType));
I = I/scalingFactor;

%Obtain the Image Gradient

Gx = [-1 1];
Gy = Gx';
Ix = conv2(I,Gx,'same');
Iy = conv2(I,Gy,'same');

%figure
%image(Ix,'CDataMapping','scaled')
%colormap('gray')
%title('Ix')

%figure
%image(Iy,'CDataMapping','scaled')
%colormap('gray')
%title('Iy')

%Define the Fuzzy Inferences System
edgeFIS = newfis('edgeDetection');

%Specify the image gradients, Ix and Iy, as the inputs of edgeFIS
edgeFIS = addvar(edgeFIS,'input','Ix',[-1 1]);
edgeFIS = addvar(edgeFIS,'input','Iy',[-1 1]);

%
sx = 0.1;
sy = 0.1;
edgeFIS = addmf(edgeFIS,'input',1,'zero','gaussmf',[sx 0]);
edgeFIS = addmf(edgeFIS,'input',2,'zero','gaussmf',[sy 0]);
%
edgeFIS = addvar(edgeFIS,'output','Iout',[0 1]);

%Specify the triangular membership functions, white and black, for Iout.
wa = 0.1;
wb = 1;
wc = 1;
ba = 0;
bb = 0;
bc = 0.7;
edgeFIS = addmf(edgeFIS,'output',1,'white','trimf',[wa wb wc]);
edgeFIS = addmf(edgeFIS,'output',1,'black','trimf',[ba …
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The Firewall Audit Checklist
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Hi,

Anyone know if the R server in SQL 2016 and R and Python feature in SQL 2017 need additional license?

Answer should be a no as MS always license everything SQL server by a single cost and ALL feature is charged already.
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Hi all,
I am not able to extract data from a package in r called rdota2. Wanted to run a function name get_league_listing from the package. Shows the following error-"Error in (function (..., deparse.level = 1, make.row.names = TRUE, stringsAsFactors = default.stringsAsFactors())  :
  numbers of columns of arguments do not match". please help me out. Thanks in advance.
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I'm not able to send an image with a  text message on my iPhone 6. After selecting the recipient from contacts I select the camera icon to the left of the text field and select an image from my local images.  The image appears at the top of the screen.    Then I enter a text message and  and hit the green uparrow.  In a second I see a red message:  "Not Delivered."  This all repeatable.  The person I'm sending the message to has an Android.   Also, I 'm in range of a WiFi signal so I assume this is all going through WiFi and not Cellular.  Does anyone know what might be going on?

Thanks.
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I am trying the code below so that if there is neither "/" nor "\" the output is an error and the application stops, but it does not work. I cannot see any thing wrong with the code.  Does any one sees any thing wrong?

 if (grepl("/", OUTpath, fixed=TRUE)) { # mac style
     OUTpath<- paste(paste(unlist(strsplit(OUTpath, "/", fixed=TRUE)), collapse="/"), "/", sep="")
   } else
     if (grepl("\\", OUTpath, fixed=TRUE)) { # windows style
       OUTpath<- paste(paste(unlist(strsplit(OUTpath, "\\", fixed=TRUE)), collapse="\\"), "\\", sep="")
     } else
       if(!grepl("/", OUTpath, fixed=TRUE) || !grepl("\\", OUTpath, fixed=TRUE)){
       trueFalse = FALSE
       errorMessage("Unrecognized path separator in OUTpath or no path specification in PARAMS file. Cannot open connection\n
                             You can edit your input file and save the changes. Afterwards, stop and restart glycoPipe and upload file again")
       stop("Unrecognized path separator in OUTpath\n")
     }
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Hi

I am looking for a way to capture standard error and redirect it to standard output in R (Shiny). I can not find any information any where in the web. Is there a way to do this?  the error gets displayed to the console, but I would like to displayed in the Shiny GUI.

Thanks
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Hi Experts,

I have a Windows 7 Home 64bit machine that wont boot in normal or safe mode....

I have pulled the drive out & backed up the data, run all tests on memory and harddrive (all ok) while I had it out I ran chkdsk /r /f  no issues found. I'm currently downloading a windows 7 disk so I can either attempt to repair from that or am  best of with a W & R? or is there something that may assist in repairing.

Windows repair from boot up does not fix it although I did come across a message about a driver missing?

The user was hacked by some one who called and he let them on his PC one thing I noticed is that windows 7 is installed on the D drive

cheers.
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Hi,
 Although the program used to run smoothly on win98 and VB5 now cannot read the pixel info of an image (ie. jpg or gif) and therefore cannot proceed
 to calculate the Lab pixel values from RGB? In particular I have test pics of 100x100 pixel and program now reads 585x1890 !!  Any ideas?

 Following is the part of the program

 Cheers
 Public Sub Command1_Click()

 Dim OFName As OPENFILENAME
 OFName.lStructSize = Len(OFName)
 'Set the parent window
 OFName.hwndOwner = Me.hwnd
 'Set the application's instance
 OFName.hInstance = App.hInstance
 'Select a filter
 OFName.lpstrFilter = "Image Files (*.bmp;*.jpg;*.png)" + Chr$(0) + "*.bmp;*.jpg;*.png" + Chr$(0) + "All Files (*.*)" + Chr$(0) + "*.*" + Chr$(0)
 'create a buffer for the file
 OFName.lpstrFile = Space$(254)
 'set the maximum length of a returned file
 OFName.nMaxFile = 255
 'Create a buffer for the file title
 OFName.lpstrFileTitle = Space$(254)
 'Set the maximum length of a returned file title
 OFName.nMaxFileTitle = 255
 'Set the initial directory
 OFName.lpstrInitialDir = "C:\"
 'Set the title
 OFName.lpstrTitle = "Open File"
 'No flags
 OFName.flags = 0

 'Show the 'Open File'-dialog
 If GetOpenFileName(OFName) Then
 Label2 = Trim$(OFName.lpstrFile)

 End If

 End Sub

 Private Sub Command2_Click()
 Dim PicInfo As BITMAP
 Dim pic As Picture
 Dim X, Y As Long
 Dim height, width As Long
 Dim R As Long
 Dim imagesource As String
 Dim hFile As Long, FileInfo As BY_HANDLE_FILE_INFORMATION
 Dim Red, 

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SQL Join Query.

I am trying to query 3 tables in a database and I am not getting the results back that I am expecting.

Here is the query:

SELECT DISTINCT m.ADName, i.FirstName, i.LastName, r.Description
FROM         Membership AS m INNER JOIN
                         user_information AS i ON m.ADName = i.NT_Username INNER JOIN
                         RolesDescription AS r ON m.RoleID = r.RoleID
WHERE     (m.ApplicationID = 6)

I think its because a record does not exist in the "User_Information" (I would like the result to show a blank field if this is the case)

I am expecting 120 records but I am getting only 106.
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hi,

any one tried to upgrade the R ( in database) of SQL 2016 ? I have a SQL server 2016 AOG group with 3 x nodes SQL nodes one by one and only one has R (In database) service can't upgrade, any idea?
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How do you know if your security is working?
LVL 1
How do you know if your security is working?

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Hi

So if I manually connect using sftp from a centos box to my Proftpd server and issue a get command to grab a file, all's good.

If I do it in a script, it fails after getting the file  (next step would be to delete the file which it never does)

It's driving me round the bend abit, so any help would be greatly appreciated.

on the sftp client side
Log from Scripted version
2018-03-15 12:34:35,029 [30711] <sftp:6>: received READ (5) SFTP request (request ID 11, channel ID 0)
2018-03-15 12:34:35,030 [30711] <sftp:7>: received request: READ 8fc9867310df242f 0 32768
2018-03-15 12:34:35,030 [30711] <sftp:8>: sending response: STATUS 1 'End of file' ('End of file' [-1])
2018-03-15 12:34:35,030 [30711] <ssh2:9>: sending CHANNEL_DATA (remote channel ID 0, 37 data bytes)
2018-03-15 12:34:35,030 [30711] <ssh2:19>: waiting for max of 600 secs while polling socket 1 using select(2)
2018-03-15 12:34:35,030 [30711] <ssh2:3>: sent SSH_MSG_CHANNEL_DATA (94) packet (80 bytes)
2018-03-15 12:34:35,031 [30711] <ssh2:11>: channel ID 0 remote window size currently at 2096633 bytes
2018-03-15 12:34:35,031 [30711] <ssh2:19>: waiting for max of 600 secs while polling socket 0 using select(2)
2018-03-15 12:34:35,031 [30711] <ssh2:20>: SSH2 packet len = 44 bytes
2018-03-15 12:34:35,031 [30711] <ssh2:20>: SSH2 packet padding len = 5 bytes
2018-03-15 12:34:35,031 [30711] <ssh2:20>: SSH2 packet payload len = 38 bytes
2018-03-15 12:34:35,031 [30711] <ssh2:19>: waiting for max of …
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Hello All,

Hope someone clarify the error I have in my STIDF data plot.
I'm reading through related questions but no solution fixed my error.

I'm working on STIDF  and I want to use stplot and spplot but it seems spplot is not suitable for STIDF.

When I use stplot I always get this error:

    Error in `levels<-`(`*tmp*`, value = if (nl == nL) as.character(labels) else paste0(labels,  :
      factor level [2] is duplicated

Here's how my data in STIDR data type looks:

           Lat         Long       sp.ID       time                                 endTime              TimeIndex     Speed    Station_ID    
    41.71268  -87.64341    1      2017-07-01 00:00:00   2017-07-01 18:00:00       1                    86           2
    41.47268  -87.35281    2      2017-07-01 00:00:00   2017-07-01 18:00:00       1                    35           5
    41.71268  -87.64341    3      2017-07-01 01:00:00   2017-07-01 18:01:00       2                    43           2
    41.47268  -87.35281    4      2017-07-01 01:00:00   2017-07-01 18:01:00       2                    55           5

I think it's related to my ID variable but I have duplicated station ID because I have hourly reading for each location , so ID will be repeated in my dataset.

I tried this code but I still have the error message,

 STIDF_jour$Station_ID <- factor(STIDF_jour $Station_ID, levels = rev(unique(STIDF_jour $Station_ID)), ordered=TRUE)
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I want to assign SSL Certificate to my exchagne server 2016 via certificate authority from active directory,
all of the steps, done in proper way,  it show " invalid"
please help me

tnx
R. Rahimi
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I need to know if there's a way in Excel to have only 3 colors for the "Conditional Formatting" > "3-Color Scale"
to be NOT a "Graded Color Scale".
I only need RED, YELLOW and GREEN, if values fall in between of R and Y, then they come as Orange (Graded Scale effect).
Screen shot with Conditional Formatting
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Hi I am in a bit of a crunch on this SQL query here so I appreciate any help.

Lets say I have this part:

HON787800F015

I need to find all parts that match above up to the F but then have an R after. For example one of the results that would match would look like this:

select * from inv_master (nolock) where part_no like 'HON787800R%'

I appreciate any help you might be able to offer

Thank you much.
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Dear expert

Please help me with a query command you can find below, Now I got problem with variables @P4, @P5, @P6, problem is that I want to show result that minus the value of @P1, @P2, @P3, this  R.DatetimeSentToReceiver < DATEADD(MONTH, 2, @ReminderMonth) adds 2 months value, what i want is @P4 = @P4 - @P1 now I tried add this in query, and it return with error ofc. How to do this in the correct way? There are many way doing this, I need a great solution for it, what Im after is this, data in current months output, data in last month output.  @ReminderMonth will be every months day 1 so that will change too.
 
Any help would be great.

      DECLARE
            @ReminderMonth date = '2018--01-01';

DECLARE @P1 int =  
        (
            SELECT      
        COUNT(*)
        FROM Invoice.Reminder R
        WHERE
        R.DatetimeSentToReceiver >= @ReminderMonth
        AND R.DatetimeSentToReceiver < DATEADD(MONTH, 1, @ReminderMonth)
        AND R.ReminderNumber = 1
            ),
        @P2 int =  
        (
            SELECT      
        COUNT(*)
        FROM Invoice.Reminder R
        WHERE
        R.DatetimeSentToReceiver >= @ReminderMonth
        AND R.DatetimeSentToReceiver < DATEADD(MONTH, 1, @ReminderMonth)
        AND R.ReminderNumber = 2
            ),
        @P3 int =  
        (
            SELECT      
        COUNT(*)
        FROM Invoice.Reminder R
        WHERE
        R.DatetimeSentToReceiver >= @ReminderMonth
        AND R.DatetimeSentToReceiver < DATEADD(MONTH, 1, …
0

R

126

Solutions

299

Contributors

R is a programming language and environment used primarily for statistical data analysis.

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