search for: hrishi

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2010 May 17
1
Range Coding
...erriberry estimates a simple self-training range-coding backend could be reasonably expected to decrease bit usage overhead by 15-20%. Is it really true? I found one implementation.... http://svn.xiph.org/trunk/ghost/libentcode/ Did anyone verified this gain? How much is the exact gain? Regards, hrishi
2004 Aug 26
4
Codec
Good day all I want to know what the best codec is to use for asteris for VOIP We have two towns connected with a 64k line that's going to do VOIP with astersik.At the moment with the default installation the quality is bad and the bandwith is high. Is this even a codec problem Pleas help ALtus
2010 Feb 22
2
adding infrequent date labels to x-axis
I'm sure there is a clever way to do the following, but I've been unable to find it on this forum or by writing my own functions. I have 8 years worth of weekly data but would like to restrict the labels on the x-axis to months only. I've included the first year's worth of data below. My line of thought has been along these lines
2010 Feb 22
3
relative file path
Hello, Is there a way to find where a script is located within a script? getwd() doesn't do what I want because it depends on where R was called from. I want something like source("randomFile") and within randomFile there is a function called whereAmI() which returns c:\blah\blah2\randomFile.R In perl there is a library called FindBin and $FindBin::Bin has the directory of the file
2012 Apr 21
3
Gráficos en R
Hola, Por favor, ¿me podéis referenciar algún libro de R que aborde en profundidad la generación de gráficos y almacenamiento de los mismos en fichero de salida?. Me refiero tanto a gráficos relativos a series temporales como a gráficos/tablas que recojan datos numéricos. Gracias de antemano. Atte. Eva Prieto Castro [[alternative HTML version deleted]]
2011 Jul 12
1
problem plotting points based on different values
Hello Friends, I am new to R and stuck with a problem. i have two columns drug_A and drug_B, i have plotted a scatter plot using the ggplot2 function. My problem is with the third column, it is the p-value column. I want to color and size points differently based on the p_value, the p_value range is between 0<0.0001< 0.001<0.05<1. I used a script using the ifelse loop, but it
2010 Jan 28
2
Missing argument error message
Back in the days of R 2.6, if you did this, you got this: > z=function(x){x*2} > z() Error in z() : argument "x" is missing, with no default But now in this decade we get (for R 2.9 and 2.10): > z=function(x){x*2} > z() Error in z() : element 1 is empty; the part of the args list of '*' being evaluated was: (x, 2) Now I can see (after thinking about it)
2010 Feb 24
2
How to read percentage and currency data?
I'm struggling to find any help on this seemingly simple question - how does one read data with percentage (%) or currency (?,$ etc.) signs? When I try to read a data file which has any of those symbols in the data fields, they are read as characters rather than values. Is there a function or library which can deal with such values? As an example, I use this sample from one of chinna's
2010 Jun 23
5
Plotrix Trick
Dear All, I am using the plotrix library to plot some matrices. I have a problem: some of my data are outliers, hence using a linear color scale does not work very well (you would see too many cells having a similar, indistinguishable color). See the code snipped at the end of the email. Plotting the logarithm of the data gets the job done, but my problem is that I would like to write in every
2011 May 13
6
Powerful PC to run R
Dear all, I'm currently running R on my laptop -- a Lenovo Thinkpad X201 (Intel Core i7 CPU, M620, 2.67 Ghz, 8 GB RAM). The problem is that some of my calculations run for several days sometimes even weeks (mainly simulations over a large parameter space). Depending on the external conditions, my laptop sometimes shuts down due to overheating. I'm now thinking about buying a more