Displaying 20 results from an estimated 2000 matches similar to: "Remove a complete row as per the Range in a Matrix"
2012 Aug 01
1
Error message: $ operator is invalid for atomic vectors
HI,
The code was working perfectly fine yesterday and today, until half an hour ago.? Couldn't find any problems in the code. Still, I am getting error message.
myMatrix <- data.matrix(read.table(text="
Name??????????? Age
ANTONY??????? 27
IMRAN????????? 30
RAJ????????????????? 22
NAHAS????????? 32
GEO??????????????? 42
", header=TRUE))
MinMaxArray? <- data.frame(MIN =
2012 May 25
4
Hash Table - Select and Change Data iniside Matrix
Hi, 
Here i have been a matrix like this, 
*NAME    AGE   PALCE                TRUE/FALSE*
ABC         20      INDIA 
XYZ         30       FRANCE 
PQR        40       USA 
MNO     30        KENIYA 
DEF        25        AUSTRALIA 
Here,* TRUE/FALSE*  Column containing empty values. 
So my requirement what is , need to change all the *TRUE/FALSE *column value
into "*TRUE*" where *AGE =
2012 May 30
3
Separate Array Variable Content
Hi,
I am new in R,
i have a matrix like this
MyMatrix <-
*ABC   PQR    XYZ*
10       20        30
40       50        60
70       80        90
And, i have an array containing some conditions like this,
MyArray <-  c("*ABC*>50","*PQR*<50","*ABC*<30 &* XYZ*<40")
"ABC>50" 
"PQR<50"
"ABC<30 & XYZ<40"
2012 Jun 14
3
Time difference between two dates/timing
Hi,
Here, i have a matrix like this
MyMatrix <-
*DATETIME	 HEADER1            HEADER2*
1/1/2010 0:10	197.1947	             100.0859
1/1/2010 0:20	203.8811	             100.1013
1/1/2010 0:30	206.564	              100.0433
1/1/2010 0:40	207.9563	               99.9393
i want to get the time difference in minutes between two date.
TimeDiff <- MyMatrix[1,1] -  MyMatrix[2,1] 
TimeDiff
2012 May 28
2
Hash Table - Select and Change Data iniside Matrix Using "Between"
Hi, 
Here i have been an matrix like this, 
*NAME    AGE   PALCE                TRUE/FALSE*
ABC         20      INDIA 
XYZ         30       FRANCE 
PQR        40       USA 
MNO     30        KENIYA 
DEF        25        AUSTRALIA 
GTY        34       CANADA
BNH      38        JAPAN
Here, *TRUE/FALSE  *Column containing empty values. 
So my requirement what is, need to change all the TRUE/FALSE
2012 Jul 13
3
Column create and Update using function
Hi,
here i have a Max and Min values
Min <-3
Max <-6
and also a matrix like this,
ABC        XYZ         PQR
------       -------        -------
2                 4                3
5                 4                8
7                 1                3
In this i need to check each particular column values are between Max and
Min value.
If the coulmn value not coming between Max and
2012 Oct 05
4
Minute Difference
Hi,
Here i have a time along with date,
for eg:-  "10/5/2012 5:05:00 AM"
i need to do minus 10 minutes along current date
Like this :- "10/5/2012 4:55:00 AM"
Thanks in Advance
Antony
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2012 Jul 11
4
MODE , VARIANCE , NTH PERCENTAILE
Hi,
Here i have an matrix like this,
ABC    PQR    XYZ   MNO
------   -------   ------   --------
3            6        7          15
2          12        24        15
20         5         1           2
25          50      15         35
i need to get the 
                                      "MODE" - for each column-wise
                                      "VARIANCE" - for
2012 Aug 17
8
Get the filename from the given path
Hi,
Here i have a file path, 
for eg : - 
FPath <- "D:\\MyFolder\\MyFile.txt"
HOW IS POSSIBLE TO GET THE FILE NAME FROM THIS GIVEN PATH ?
- thanks in advance
Antony.
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2012 Jul 12
3
Add row into a Matrix witout headers from Function
Hi,
Here i have a matrix like this,
OLDMatrix <-
X1         X2        X3
-----      ------    ------
22          24         23
25          27         27
10          13         15
the thing is,
im running two function(SUM,COUNT) to get output in another matrix called
NEWMatrix
NEWMatrix <- c("SUM",colSums(OLDMatrix ))
NEWMatrix  <- c("COUNT",colSums(!is.na(OLDMatrix
2012 Aug 27
3
String Handling() for Split a word by a letter
Hi,
here im unable to run a string handle function called unpaste().
for eg:- a<- "12345_mydata"
Actually my requirement what is i need to get , only 12345.  Means that , i
need the all letter as a word which is before of  first  " _ " - symbol of 
"a". i tried to do with unpaste, it says function not found.  After that i
tried with "strsplit() ". it
2012 Jun 12
3
R-SCRIPT Label Calling Method
Hi,
here i have some code...
a <-1
b <- b+1
c <- b+a/20
if c >5
{ d<- 1 }
else {  d<- 0  }
i want to repeat this code from the 2nd line [b <- b+1] without using loop.
Actulay i want to use  "*Label *" and call *GoTo* method like in other
coding Languages.
For eg:- like this,
 
                           a <-1
*LabelBegin :*
                           b <-
2012 Sep 11
5
Searching from Dataframe.
Hi,
i have a dataframe containing some values.
for eg:-
MyDataFrame<-
Name   Age   Place
-------    ------    -----------
Aby          12        USA
Raj            25        UK
Romi        32        ENG
Amy         31        IND
My requirement what is, i have a search key word[it should search from all
the columns], that i need to find out from this dataframe. If search keyword
found , it
2012 Jul 24
4
ERROR : cannot allocate vector of size (in MB & GB)
Hi,
Here in R, I need to load a huge file(.csv) , its size is 200MB. [may come
more than 1GB sometimes].
When i tried to load into a variable it taking too much of time and after
that when i do cbind by groups,
getting an error like this
" Error: cannot allocate vector of size 82.4 Mb "
My requirement is, spilt data from Huge-size-file(.csv) to no. of small csv
files.
Here i will give
2012 Oct 08
2
Update CSV file content
Hi,
Here i have a csv file, it contain like this
NAME   UPDATED
---------   --------------
ABC        INDIA
XYZ         UK
My requirement what is, i need to change the value inside the csv file
(instead of INDIA i need to make it USA).
NAME   UPDATED
---------   --------------
ABC        USA
XYZ         UK
How can we update by writing into the csv file ? i dont want to delete
entire data and
2012 May 29
2
Use variable inside Function for updating the matrix
Hi,
Here i have a data frame like this,
frame name is "dat"
*NAME          AGE       ELIGIBLE*
A                     20          
B                     14
C                     35
D                     10 
E                      50
In this, i want to change the column '*ELIGIBLE*' status to '*YES*' If, AGE
between 18 to 35
Which means that, i should get a put like
2012 Jul 10
2
Count of elements in coulmns of a matrix
Could you please tell me what is the function or method to get count of
elements in all the columns in a matrix ?
for eg :-
ABC      XYZ    PQR
------      -----     ------
2            3            4
               4           5
5            4           3
              2
Result will be like
ABC      XYZ    PQR
------      -----     ------
2             4            3
Could you please help me
2012 Sep 13
2
Remove serial number column in a Dataframe into CSV
Hi,
i have an small doubt.
How can we remove serial-number column while writing a dataframe in to a csv
file ?
for eg:-
write.csv(MyDataFrame,"c:/MyData.csv")
      name         place
    -----------      -----------
1     antony    uk
2     john           usa
3     arjun         ind
here, in the csv file, serial number column is coming extra on the left-end
side.
i want to remove
2012 Aug 28
1
Unzip files from the given path to the destination path
Hi,
Any idea to - Unzip files from a  given path and sub-folders  to the
destination path ?
- Thanks 
Antony.
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2012 Aug 28
3
Get variable data Reading from the list
Here i have a variable
MyVar <- data.frame(read.csv("D:\\Doc.csv"))
And now i am storing this variable name into  a list.
MyList <- list()
MyList [length(MyList )+1]<- "MyVar"
Now what is the requirement is,
 i need to call the variable name "MyVar" from the list "MyList " and get
the data.