similar to: basic math question?

Hi all, I'm sure this is simple but I don't get it. I have a table mytable<-c(rep("Disagree",37),rep("Agree",64)) table(mytable) this gives me Agree Disagree 64 37 but I didn't ask for it to be in alphabetic order. How can I get it in original order? Disagree Agree 37 64 Thanks, Jeff Jeffrey. M. Miller, PhD

Hi all, Does anyone know if an R function for the Mantel-Haenszel chi-square for a 2x2 table exists? I’ve also seen it called the randomization Q statistic. Note that I’m not looking for the Cochran-Mantel-Haenszel…I did see that out there as cmh.test. Thanks in advance, Jeff Internal Virus Database is out-of-date. Checked by AVG Free Edition. 11:27 AM [[alternative HTML version

Hi all, Suppose I have a column vector of 600 measurements taken in 1s intervals. What I want is a new vector with the averages for each min (so there would be 10 entries). Is there an efficient way to do this? I’ve been doing it with a ‘for’ loop but something tells me there is a simple command that is more efficient. Jeff Internal Virus Database is out-of-date. Checked by

Hi All, Sorry if this is too much silly. Vorbis encoder gives out packets of information. 1. Is it that each packet contain information of one frame/window either 256 / 2048 or any length set by encoder? If yes then the encoded packet will be variable in length. 2. Every packet is divided into segments, how does the encoder decide on number of segments in each packet? It must be dependent upon

I have a puzzle as to how R is computing Cook's distance in weighted linear regression. In this case cook's distance should be given not as in OLS case by h_ii*r_i^2/(1-hii)^2 divided by k*s^2 (1) (where r is plain unadjusted residual, k is number of parameters in model, etc. ) but rather by w_ii*h_ii*r_i^2/(1-hii)^2 divided by k*s^2,

I have a math (and maybe an R) question. I want to find equilibrium population density values for a system of linear population growth equations (e.g., Pimm and Lawton 1977). The eventual goal is to perform stability analysis. I can find the partial differential equations for the Jacobian matrix, but I get stuck trying finding the equilibriuym pop densities (X*). Here is the (incorrect?) R code

Has anyone successfully linked Mplus and R and have code on how to do it? It would be great to use R to simulate datasets and then ship to Mplus for SEM analysis. I know one researcher who does this quite regularly but I can’t get ahold of him right now. Sincerely, Jeff Miller **************************************** Jeffrey M. Miller, PhD HYPERLINK

Hi List l am interested in developing price model. I have found a research paper related to price model of corn in US market where it has taken demand & supply forces into consideration. Following are the equation: Supply equation: St= a0+a1Pt-1+a2Rt-1+a3St-1+a5D1+a6D2+a7D3+U1 -(1) Where D1,D2,D3=Quarterly Dummy Variables(Since quarterly data are considered) Here, Supply

Dear R users: I encountered difficulties in michaelis-menten equation. I found that when I use right model definiens, I got wrong Km vlaue, and I got right Km value when i use wrong model definiens. The value of Vd and Vmax are correct in these two models. #-----right model definiens-------- PKindex<-data.frame(time=c(0,1,2,4,6,8,10,12,16,20,24),

i know this is not about R. After applying quantile regression with t=0.5,0.6 on the data set WBC( Wisconsin Breast Cancer)with 678 observations and 9 independent variables(inp1,inp2,...inp9) and 1 dependent variable(op) i have got the following results for beta values. when t=0.5(median regression) beta values b1=0.002641,b2=0.045746,b3=0.

Hello, I coming across a strange problem doing math on an xts object. If I have an xts object of stock prices (perhaps 5 minute bars of open, high, low,close) and want to do some math, the results fail. For example: d$close[10] - d$open[10] works perfectly d$close[10] - d$open[9] fails. I just get an answer of "numeric(0) Index: numeric(0)". My guess is that xts is breaking

I'm just getting to grips with using ode function and have used the examples and vignettes to produce a small model of a one-pool, michaelis-menten, enzyme kinetic reaction. The rate of flux of substrate into pool A is constant (fluxoa) however the rate of flux out of pool A is controlled by the HMM equation (v = Vmax/ ( 1 + (Km / Concentration A )) ). This function works fine and

Thank you for reminding me the notion of the basic block. Of course, I know all the assembly takes the form of BBs and is divided into units of BB. OK. It looks better for me to explain what I wanted to do more clear from the first. Actually, I am working on emitting out an assembly of VM by using LLVM. LLVM assembly looks similar with this VM assembly except BB. The VM assembly does not have the

I want to create a script for IVR that compiles responses, aggregates them to a total number. Then, run an equation based on the result. Press 1 for X (X is a positive number 500) Press 2 for Y (Y is a positive number 200) Press 3 for Z (Z is a positive number 300) Press 20 to calculate the results = 500+200+300 =1000 then, exten => s,n,Read(NUMBER,,1000) exten => s,n,SayDigits(${NUMBER})

Hi, I've made a research about how to compare two regression line slopes (of y versus x for 2 groups, "group" being a factor ) using R. I knew the method based on the following statement : t = (b1 - b2) / sb1,b2 where b1 and b2 are the two slope coefficients and sb1,b2 the pooled standard error of the slope (b) which can be calculated in R this way: > df1 <-

Folks, I'm now looking at https://llvm.org/bugs/show_bug.cgi?id=16274, which seems to have some support in the vectorizer, but not as we need for this particular case. I may have missed something obvious, please let me know if there is a better way. As you already know, ARM has two FP instruction sets: VFP and NEON. VFP applies to single FP registers while NEON is a full SIMD. The problem is

Hi, I would like to put a math expression in the header of a panel. Acctually, I need to substitute the 'a' to a script-a in a transcription contained in the factor by which the data set is divided. So, "/spak/" should be "/spAk/" where A should be a script-a. I guessed that math expressions would be the way to go on this.. Is this possible? /Fredrik --

hey, There is tool that calculates execution count and total number of blocks , is there anything available to detemine size of basic blocks in a program in bytes? Thanks - T --------------------------------- Do you Yahoo!? Yahoo! Small Business - Try our new resources site! -------------- next part -------------- An HTML attachment was scrubbed... URL:

What we are trying to do is something like where; User A User B User C User D whereby User D's files can be read-write by only C,B ,A whereby User C's files can be read-write by only B,A whereby User B's files can be read-write by only A. that is we want some hierachy . How do we do this ? How do we set the permissions on the actual folders on the Hard Drives and how do we set

As I have previously asked, in response to a similar question: Is this a homework problem? cheers, Rolf Turner rolf at math.unb.ca