Displaying 8 results from an estimated 8 matches for "ghalsasi".
2009 Jan 30
1
How to collect arrays in an array?
Dear R-Experts,
Seek your help.
Please let me know how arrays of different sizes can be collected in one
array.
suppose I want to collect following arrays in one array. How can I do so?
array(1): #row=3, #col=4(these columns store data of different types)
array(2): #row=6, #col=4
array(3): #row=3, #col=4
....
want to store in Main_array
How to define dimensions of Main_array?
Thank you.
2009 Feb 05
1
help regarding storing time difference values in same unit?
Dear R-Experts,
Seek your help.
In a List object e.g. Time_duration[[]], I am storing differece between two
time-stamps (start-time and end-time) for a certain event.
Time difference does not remain constant for, say, 10 observations.
Each time, the time difference is given in different time units: seconds /
hours / minutes.
Can you please tell me - how I can store the values of time
2009 Feb 08
1
How to print console output statements from within script or function?
Dear R-Experts,
Seek your help.
I am calling say 20 functions one by one in one script.
To reach the end, it takes approximately one hour.
While R is performing calculations, I would like to print console output
statements to track the progress.(e.g. "Result of function-1 is done")
Note: I have already tried "print" however, it did not work.
Thank you in advance.
Regards,
2009 Feb 16
5
How to create sequence of constant time interval
Dear R-Experts,
seek your help.
There are two parts I want to deal with.
1)
I want to create a time interval of say, 30 minutes starting from "00:00:00"
hrs
Thus at the end, I want to create sequence:
00:00:00
00:30:00
01:00:00
01:30:00
..
..
How to do so ?
Later, I want to change the time-increment value in a variable and changing
the value of this variable, I would like to create
2009 Apr 02
1
help regarding converting the available date in "right" date
Dear R users,
I have a table with say three columns and 70 rows.
The second column has dates in format dd.mm.yy (i.e. 01.10.07 indicating
record for October 1, 2007).
I read the text file, containing the records. Now, I want to find out the
weekday for each date.
However, I cannot do so.
1)
If I type result[1,"Date"] to see the Date in the first row, I get following
output:
70
2009 Feb 04
1
How to declare an array with columns storing different datatypes/precision
Dear R- Experts,
Seek your help.
I want to creata data as follows.
Ref_array with 4 columns.
1st column should store data of precision: 8.4 (i.e. 8 digits before decimal
point and 4 digits after decimal points)
2nd column: should store data of type date "yyyy-mm-dd hh:mm:ss"
3rd column: only integer value. No decimal points
4th column: percentage values
Please help.
Thank you in
2009 Feb 08
1
Tip for performance improvement while handling huge data?
Hello All,
For certain calculations, I have to handle a dataframe with say 10 million
rows and multiple columns of different datatypes.
When I try to perform calculations on certain elements in each row, the
program just goes in "busy" mode for really long time.
To avoid this "busy" mode, I split the dataframe into subsets of 10000 rows.
Then the calculation was done very
2010 Nov 26
2
3D-surface colour based on the values of X or Y data points
Dear R-experts,
Using persp3d(), I plotted a 3d surface. I would like to colour this surface
based on the result values (dependent variable) grouped in, say, three to
five different ranges. Later, I would also like to paint the same surface
based on the range-values of one of the independent variables.
Please help.
Thank you.
Regards,
Suresh
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