Adding Legend in R using Column names

# add legend to the graph
 legend("topright", legend = c(headerNames[2:length(headerNames)]),
        col=2:length(rsm), pch=20, lty=1,
        lwd=0.75, bty="n", cex=0.75)

Adding Gridlines in R Manually using abline()

  # vertical grid lines
  xMin <- 0
  xMax <- 10
  xStep <- 1
  for (x in seq(xMin, xMax, xStep)){
   print (x)
   abline(v=(seq(x,100,25)), col=195, lty="dotted")
  }
  # highlight on x=4 and x=5
  abline(v=(seq(4,100,25)), col="red", lty=1)
  abline(v=(seq(5,100,25)), col="red", lty=1)

  # horizontal grid lines
  yMin <- 0
  yMax <- 1
  yStep <- 0.1
  for (y in seq(yMin, yMax, yStep) ){
   print (y)
   abline(h=(seq(y,100,25)), col=195, lty="dotted")
  }

  # highlight at y=0.8
  abline(h=(seq(0.8,100,25)), col="red", lty=1)

Determine Column Number based on Column Names

    # print the column name
    print ( colnam )

    # print the number of columns, this is not changing
    print ( counter <-length(rsm) )

    # determine the column number based on the column name
    # and store to a variable
    columnNumber <- which( colnames(rsm)==colnam )

    # print the column number
    print ( columnNumber )

Reading CSV and printing the headers

# Read the raw data
rsm <- read.csv("c:/amadriaga/a_r/rawServerMemory.csv")

# Save the column names to array
headerNames <- colnames(rsm)

# Get count of columns
print (length(rsm))

# Loop on column headers and print the header names
for (colnam in names(rsm)[ 1:length(rsm) ] ){
    # print the column name
    print ( colnam )

    # print the number of columns, this is not changing
    print ( counter <-length(rsm) )

    # determine the column number based on the column name
    # and store to a variable
    columnNumber <- which( colnames(rsm)==colnam )

    # print the column number
    print ( columnNumber )
}

A simple VBA in Excel 2010 to import each CSV file as a tab in XLS

Sub ImportAllCsvInDirectory()
'
' Copied from: http://www.excelforum.com/excel-programming-vba-macros/504512-import-multiple-csv-files-into-current-workbook-as-separate-sheets.html
'
Dim MyPath As String
Dim FilesInPath As String
Dim MyFiles() As String
Dim SourceRcount As Long
Dim Fnum As Long
Dim mybook As Workbook
Dim basebook As Workbook

'Fill in the path\folder where the files are
'on your machine
'MyPath = "c:\Data"
MyPath = GetFolder("c:\")


'Add a slash at the end if the user forget it
If Right(MyPath, 1) <> "\" Then
MyPath = MyPath & "\"
End If

'If there are no Excel files in the folder exit the sub
FilesInPath = Dir(MyPath & "*.csv")

'If Not FilesInPath = False Then
If FilesInPath = "" Then
MsgBox "No files to consolidate"
Exit Sub
End If

On Error GoTo CleanUp

Application.ScreenUpdating = False
Set basebook = ThisWorkbook

'Fill the array(myFiles)with the list of Excel files in the folder
Fnum = 0
Do While FilesInPath <> ""
Fnum = Fnum + 1
ReDim Preserve MyFiles(1 To Fnum)
MyFiles(Fnum) = FilesInPath
FilesInPath = Dir()
Loop

'Loop through all files in the array(myFiles)
If Fnum > 0 Then
For Fnum = LBound(MyFiles) To UBound(MyFiles)
Set mybook = Workbooks.Open(MyPath & MyFiles(Fnum))
mybook.Worksheets(1).Copy after:= _
basebook.Sheets(basebook.Sheets.Count)

On Error Resume Next
ActiveSheet.Name = mybook.Name
On Error GoTo 0

' You can use this if you want to copy only the values
' With ActiveSheet.UsedRange
' .Value = .Value
' End With

mybook.Close savechanges:=False
Next Fnum
End If
CleanUp:
Application.ScreenUpdating = True

SaveAsNewFile

End Sub


'
' Copied from: http://www.mrexcel.com/forum/excel-questions/294728-browse-folder-visual-basic-applications.html
'
Function GetFolder(strPath As String) As String
Dim fldr As FileDialog
Dim sItem As String
Set fldr = Application.FileDialog(msoFileDialogFolderPicker)
With fldr
    .Title = "Select a Folder"
    .AllowMultiSelect = False
    .InitialFileName = strPath
    If .Show <> -1 Then GoTo NextCode
    sItem = .SelectedItems(1)
End With
NextCode:
GetFolder = sItem
Set fldr = Nothing

End Function

'
'
Sub SaveAsNewFile()
    Dim wb As Workbook
    Dim NewFileName As String
    Dim NewFileFilter As String
    Dim myTitle As String
    Dim FileSaveName As Variant
    Dim NewFileFormat As Long
  
    Set wb = ThisWorkbook
  
    'Use following code to set to workbook other than this one
    'Set wb = Workbooks("My Test Save As File.xlsm")
  
    If Application.Version >= 12 Then   'Version 12 is xl2007
      'Note: If file extension not included in B18 then concatenate it
      'NewFileName = wb.Sheets("Sheet1").Range("B18").Value & ".xlsm"
      NewFileFilter = "Excel Macro-Enable Workbook (*.xlsm), *.xlsm"
      'The value 52 is substituted in next line for the constant _
       xlOpenXMLWorkbookMacroEnabled because earlier versions of _
       excel will not recognize the constant and code will error.
      NewFileFormat = 52
    Else
      'Note: If file extension not included in B18 then concatenate it
      'NewFileName = wb.Sheets("Sheet1").Range("B18").Value & ".xls"
      NewFileFilter = "Excel 97-2003 Workbook (*.xls), *.xls"
      'Because xlNormal is an earlier version constant, later versions _
       of excel will recognize it.
      NewFileFormat = xlNormal
    End If
  
    myTitle = "Navigate to the required folder"
  
    FileSaveName = Application.GetSaveAsFilename _
            (InitialFileName:=NewFileName, _
             FileFilter:=NewFileFilter, _
             Title:=myTitle)
    If Not FileSaveName = False Then
      wb.SaveAs Filename:=FileSaveName, _
                    FileFormat:=NewFileFormat
    Else
      MsgBox "File NOT Saved. User cancelled the Save."
    End If

End Sub

'
'
Sub OpenFile()
Dim sFilename As String

sFilename = Application.GetOpenFilename("Excel files (*.xls), *.xls")
If Not sFilename = False Then
Workbooks.Open sFilename
Else
      MsgBox "File NOT Saved. User cancelled the Save."
    End If
End Sub

Creating the SD image for Raspberry Pi using Mac OS X

1. Download the image: 2013-02-09-wheezy-raspbian.img from 2013-02-09-wheezy-raspbian.zip into /Users/alexm/Downloads and unzip it.


2. Insert the SD card into the slot on Mac

3. Verify the disk number assignment of the SD card

ALEXs-MacBook-Pro~$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.1 GB   disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            419.0 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
   4:       Microsoft Basic Data BOOTCAMP                80.2 GB    disk0s4
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *16.0 GB    disk1
   1:             Windows_FAT_32                         58.7 MB    disk1s1
   2:                      Linux                         1.9 GB     disk1s2

4. Unmount the sd card
ALEXs-MacBook-Pro~$ umount /dev/disk1
umount: /dev/disk1: not currently mounted

5. Unmount again using the diskutil
ALEXs-MacBook-Pro:~$ diskutil unmountDisk /dev/disk1
Unmount of all volumes on disk1 was successful

6. Write the image into the sd card, note, it may take several minutes, take a coffee break.
ALEXs-MacBook-Pro:~$ sudo dd bs=1m if=/Users/alexm/Downloads/2013-02-09-wheezy-raspbian.img of=/dev/disk1

106+0 records in
105+0 records out
110100480 bytes transferred in 75.611085 secs (1456142 bytes/sec)

7. Once completed, eject the sd card.
ALEXs-MacBook-Pro:~$ diskutil eject /dev/disk1
Disk /dev/disk1 ejected

8. Remove sd card and insert into the raspberry pi.

9. Connect all accessories on the raspberry pi and power on.

10. After reboot, you may be able to modify the configuration by opening a terminal and using
the rasp-config:

pi@raspberry$ raspi-config

How to enable X11 Forwarding with SSH on Mac OS X Lion for Raspberry Pi

Steps in getting an X-terminal from Raspberry Pi Using Mac OS X

1. Enable X11 Forwarding with the “X11Forwarding yes” option set in “/private/etc/sshd_config” for your SSH daemon on Mac in order to receive X11 client request back from  raspberry pi through ‘ssh‘ with the -X option set.
    user@mac~$ vi /private/etc/sshd_config
    uncomment and set to yes "X11Forwarding yes"

2. Allow remote client to use Mac's display
    user@mac~$ xhost +

3. Login into the raspberry pi with -X option to install packages
     user@mac~$ ssh -X pi@192.168.1.10

4. Install packages on the raspberry pi
     pi@raspberrypi ~ $ sudo apt-get install libnss3
   pi@raspberrypi ~ $ sudo apt-get install x11-apps

5. Set display
   pi@raspberrypi ~ $ export DISPLAY=192.168.1.12:0

6. Open x11 terminal from raspberry to the Mac
   pi@raspberrypi ~ $ x-terminal-emulator
   OR
   pi@raspberrypi ~ $ lxterminal

7. Test xclock or xeyes
   pi@raspberrypi ~ $ xclock
   OR
   pi@raspberrypi ~ $ xeyes

8. From another terminal on Mac, you may directly execute

user@mac~$ ssh -X -f pi@192.168.1.10 xcalc -bg yellow -fg blue
pi@192.168.1.10's password:
user@mac~$ ssh -X -f pi@192.168.1.10 xeyes -bg white -fg blue
pi@192.168.1.10's password:


                 

Oracle sqlplus and instant client on Mac OS/X without DYLD_LIBRARY_PATH

URL: http://blog.caseylucas.com/2013/03/03/oracle-sqlplus-and-instant-client-on-mac-osx-without-dyld_library_path/

Posted on March 3, 2013

I recently needed to get sqlplus (11.2) running on a mac (10.8.2). Oracle supports this via their instant client. For basic sqlpus, you need the lite oracle instant client and oracle sqlplus instant client packages. If you try to run sqlplus after unzipping the files, you probably will see an error message similar to:

$ ./sqlplus
dyld: Library not loaded: /ade/b/2649109290/oracle/sqlplus/lib/libsqlplus.dylib
Referenced from: /Users/clucas/apps/instantclient_11_2/./sqlplus
Reason: image not found
Trace/BPT trap: 5

This error can be fixed using one of the following methods:

1. Move all the executables and supporting library files to locations which are searched by default (/usr/lib and /usr/bin.)  See this stackoverflow answer.
2. Set your DYLD_LIBRARY_PATH environment variable so that the sqlplus executable can find required oracle libraries and so that those libraries can also find their dependencies.

Both of these will work, but I didn’t really like them because (1) I’m not a fan of installing (and having to remember how to clean up) various files into /usr/* and (2) DYLD_LIBRARY_PATH can affect everything else you run.
You can use otool to see the library locations embedded in the executables and libraries. Ex:

$ otool -L sqlplus
sqlplus:
/ade/b/2649109290/oracle/sqlplus/lib/libsqlplus.dylib (compatibility version 0.0.0, current version 0.0.0)
/ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1 (compatibility version 0.0.0, current version 0.0.0)
/ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib (compatibility version 0.0.0, current version 0.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.1.0)

I assume those /ade/… paths are from the machine oracle used for building the instant client software.  We can replace these with @executable_path in order to have the dynamic loader find the libraries in the same directory where the executable is found. We want to end up with something like:

$ otool -L sqlplus
sqlplus:
@executable_path/libsqlplus.dylib (compatibility version 0.0.0, current version 0.0.0)
@executable_path/libclntsh.dylib.11.1 (compatibility version 0.0.0, current version 0.0.0)
@executable_path/libnnz11.dylib (compatibility version 0.0.0, current version 0.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.1.0)

Assuming you also adjust the libraries in the same directory, you’ll be able to run sqlplus just by having it in your PATH.  You can run the following script in the directory where sqlplus is located.  It will change all of the oracle dynamic library references to use @executable_path instead of the /ade/… full path:

#!/bin/sh
# script to change the dynamic lib paths and ids for oracle instant client
# exes and libs

# proces all the executable files in this directory
find . -maxdepth 1 -type f \( -perm -1 -o \( -perm -10 -o -perm -100 \) \) -print | while read exe
do
    echo adjusting executable $exe
    baseexe=`basename $exe`
    otool -L $exe | awk '/oracle/ {print $1}' | while read lib
    do
        echo adjusting lib $lib
        baselib=`basename $lib`
        if [ "$baseexe" = "$baselib" ]
        then
            echo changing id to $baselib for $exe
            install_name_tool -id $baselib $exe
        else
            echo changing path id for $lib in $exe
            install_name_tool -change $lib @executable_path/$baselib $exe
        fi
    done
done

Once the script is run and it changes the libs and executables, you can just add the directory holding sqlplus to your path and run sqlplus. No need to set any other oracle environment variables like ORACLE_HOME. Here’s the whole thing:

$ mkdir example
$ cd example
/Users/clucas/apps/example
$ unzip ~/dl/instantclient-basiclite-macos.x64-11.2.0.3.0.zip 
Archive:  /Users/clucas/dl/instantclient-basiclite-macos.x64-11.2.0.3.0.zip
  inflating: instantclient_11_2/BASIC_LITE_README  
  inflating: instantclient_11_2/adrci  
  inflating: instantclient_11_2/genezi  
  inflating: instantclient_11_2/libclntsh.dylib.11.1  
  inflating: instantclient_11_2/libnnz11.dylib  
  inflating: instantclient_11_2/libocci.dylib.11.1  
  inflating: instantclient_11_2/libociicus.dylib  
  inflating: instantclient_11_2/libocijdbc11.dylib  
  inflating: instantclient_11_2/ojdbc5.jar  
  inflating: instantclient_11_2/ojdbc6.jar  
  inflating: instantclient_11_2/uidrvci  
  inflating: instantclient_11_2/xstreams.jar  
$ unzip ~/dl/instantclient-sqlplus-macos.x64-11.2.0.3.0.zip 
Archive:  /Users/clucas/dl/instantclient-sqlplus-macos.x64-11.2.0.3.0.zip
  inflating: instantclient_11_2/SQLPLUS_README  
  inflating: instantclient_11_2/glogin.sql  
  inflating: instantclient_11_2/libsqlplus.dylib  
  inflating: instantclient_11_2/libsqlplusic.dylib  
  inflating: instantclient_11_2/sqlplus  
$ export PATH=$PATH:~/apps/example/instantclient_11_2
$ sqlplus 
dyld: Library not loaded: /ade/b/2649109290/oracle/sqlplus/lib/libsqlplus.dylib
  Referenced from: /Users/clucas/apps/example/instantclient_11_2/sqlplus
  Reason: image not found
Trace/BPT trap: 5
$ cd instantclient_11_2/
/Users/clucas/apps/example/instantclient_11_2
$ changeOracleLibs.sh 
adjusting executable ./adrci
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
changing path id for /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1 in ./adrci
adjusting lib /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib
changing path id for /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib in ./adrci
adjusting executable ./genezi
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
changing path id for /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1 in ./genezi
adjusting executable ./libclntsh.dylib.11.1
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
changing id to libclntsh.dylib.11.1 for ./libclntsh.dylib.11.1
adjusting lib /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib
changing path id for /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib in ./libclntsh.dylib.11.1
adjusting executable ./libnnz11.dylib
adjusting lib /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib
changing id to libnnz11.dylib for ./libnnz11.dylib
adjusting executable ./libocci.dylib.11.1
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libocci.dylib.11.1
changing id to libocci.dylib.11.1 for ./libocci.dylib.11.1
adjusting executable ./libociicus.dylib
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
changing path id for /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1 in ./libociicus.dylib
adjusting executable ./libocijdbc11.dylib
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
changing path id for /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1 in ./libocijdbc11.dylib
adjusting lib /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib
changing path id for /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib in ./libocijdbc11.dylib
adjusting executable ./libsqlplus.dylib
adjusting lib /ade/b/2649109290/oracle/sqlplus/lib/libsqlplus.dylib
changing id to libsqlplus.dylib for ./libsqlplus.dylib
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
changing path id for /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1 in ./libsqlplus.dylib
adjusting lib /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib
changing path id for /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib in ./libsqlplus.dylib
adjusting executable ./libsqlplusic.dylib
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
changing path id for /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1 in ./libsqlplusic.dylib
adjusting lib /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib
changing path id for /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib in ./libsqlplusic.dylib
adjusting executable ./sqlplus
adjusting lib /ade/b/2649109290/oracle/sqlplus/lib/libsqlplus.dylib
changing path id for /ade/b/2649109290/oracle/sqlplus/lib/libsqlplus.dylib in ./sqlplus
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
changing path id for /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1 in ./sqlplus
adjusting lib /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib
changing path id for /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib in ./sqlplus
adjusting executable ./uidrvci
adjusting lib /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1
changing path id for /ade/b/2649109290/oracle/rdbms/lib/libclntsh.dylib.11.1 in ./uidrvci
adjusting lib /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib
changing path id for /ade/b/2649109290/oracle/ldap/lib/libnnz11.dylib in ./uidrvci
$ sqlplus

SQL*Plus: Release 11.2.0.3.0 Production on Sun Mar 3 22:38:28 2013

Copyright (c) 1982, 2012, Oracle.  All rights reserved.

Enter user-name: ^C
$ cd ..
$ sqlplus

SQL*Plus: Release 11.2.0.3.0 Production on Sun Mar 3 22:38:40 2013

Copyright (c) 1982, 2012, Oracle.  All rights reserved.

Enter user-name: ^C

About these ads

Updating GNU packages in Mac OS X

The Mac OS X 10.7.5 (Lion) may not have the latest version of the GNU tools like bash, sed, etc. However, they can be updated by downloading the source and compiling them on Mac.

The first step is to download the command_line_tools_for_xcode_4.5_os_x_lion.dmg and install it on your Mac OS X. Login here: Developer's Login.  After that, you can update the following:

1. The bash from 3.2 to 4.2.
    1.1. Download source here: bash-4.2.tar
    1.2. Untar and open a terminal
    1.3. Compile and install using: ./configure; make; make install

2. The sed from 3.2 to 4.2.
    2.1. Download source here: sed-4.2.2.tar
    2.2. Untar and open a terminal
    2.3. Compile and install using: ./configure; make; make install

RSA Client Failed - Error loading desktop client?

Source: https://community.emc.com/message/634487 

RSA Client Failed - Error loading desktop client?

SecurID.exe is trying to load desktopclient.dll, which is depending upon QtGui4.dll, which by itself is depending upon QtCore4.dll, both usually installed in C:\Program Files (x86)\RSA SecurID Token Common (on a 64-bit Windows). Under certain circumstances (don't know exactly when and why) another copy of QtCore4.dll might get installed in C:\Windows\SysWOW64, which is missing one entry point (in my case there was a version 4.8, copyright by Nokia, but SecurID.exe build 4.1.1.836 is using version 4.4 of this library). Obviously there is a bug in desktopclient.dll causing the attempt to load the version in SysWOW64 instead the one in its own Common directory, which causes the client to fail...

But the good news, I found a work around:

Copy QtCore4.dll from C:\Program Files (x86)\RSA SecurID Token Common into C:\Program Files (x86)\RSA SecurID Software Token and voila, SecurID.exe runs perfectly fine.

Please RSA/EMC dev guys, fix this issue. Actually, there is a flag in LoadLibraryEx called LOAD_WITH_ALTERED_SEARCH_PATH… You might want to read this article, too: http://msdn.microsoft.com/en-us/library/windows/desktop/ms682586(v=vs.85).aspx ;-)

Mounting a Windows Drive Remotely in a Linux Machine

1. Create a local user in the Windows machine (IP=10.253.99.19)

      Ex. Account name = user123 and password = abc123%

2. Set the drive E:\ shareable to user123 with READ / WRITE privileges on Windows machine (IP=10.253.99.19)

3. Make a mounting point directory on the Linux machine (IP=10.253.99.20)

    Ex. $ mkdir -p /usr/local/pub/mnt/svr19

4.  Make a bash script named remountServers.sh  on the Linux machine (IP=10.253.99.20)

  

#/bin/bash

#Unmount

sudo umount /usr/local/pub/mnt/svr19

#Mount

sudo mount -t cifs //10.253.99.19/e -o username=user123,password=abc123% /usr/local/pub/mnt/svr19

5. Make the script executable

    Ex. $ chmod a+x remountServers.sh 

6. Execute the script

   Ex. $ ./remountServers.sh