similar to: will 9 data points work for a regression in R?

fit lwr upr 1 218.4332 90.51019 346.3561 2 218.3906 90.46133 346.3198 3 218.3906 90.46133 346.3198 4 161.3982 44.85702 277.9394 5 192.4450 68.39903 316.4909 6 179.8056 56.49540 303.1158 7 219.5406 91.52707 347.5542 8 162.6761 46.65760 278.6945 9 193.8506 70.59838 317.1029 10 181.3816 58.11305 304.6502 11 221.2871 92.14366 350.4305 12 164.2947 47.91081 280.6785 13

Can someone please help with the error message below? thanks! Start: AIC=-Inf value ~ 1 + Core_CPI__ + GDP_change + Unemployment + housing + interest + S_P + d1 + d2 + d3 Error in if (any(ch)) { : missing value where TRUE/FALSE needed In addition: Warning message: attempting model selection on an essentially perfect fit is nonsense

My stepAIC function works for one set of data but not another....one set of data shows the steps of eliminating variables, versus another set of data doesn't throw away any variables. Can anyone please explain why? Thanks ______________________________________________________________________ The information transmitted, including any attachments, is intended only for the person or entity

Can someone please help with the below - thanks! Warning messages: 1: Not plotting observations with leverage one: 7 2: Not plotting observations with leverage one: 7 > print(qqPlot(fit),envelop=.95); Error in model.frame.default(formula = Y ~ X - 1, drop.unused.levels = TRUE) : variable lengths differ (found for 'X') In addition: Warning message: In matrix(yhat, n, reps) : data

Can someone please help with the error message below? Warning messages: 1: Not plotting observations with leverage one: 7 2: Not plotting observations with leverage one: 7 > print(qqPlot(fit),envelop=.95); Error in model.frame.default(formula = Y ~ X - 1, drop.unused.levels = TRUE) : variable lengths differ (found for 'X') In addition: Warning message: In matrix(yhat, n, reps) :

Ran a bunch of variables in R and the final result of StepAIC is as below: Why are the first 5 variables kept in the stepwise result?? Are the last 4 variables finally chosen after Stepwise? Thanks Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 1.315e-01 2.687e-01 0.490 0.63611 Core_CPI__ 1.290e-02 7.496e-03 1.721 0.11927 GDP_change -3.482e-03 2.075e-03 -1.678 0.12767

For example, if coefficient's p-value is less than 0.1 I want the stepwise to automatically drop that variable. Can the stepAIC be customized to do that? SAS seems to be able to customized stepwise function with p-value or cooks'd. thanks! ______________________________________________________________________ The information transmitted, including any attachments, is intended only

For a set of data showing seasonality (related to the 4th quarter), ncv test in R shows p-value of 0.008 which rejects the null hypothesis of constant-variance. How to apply White's standard error in R? thanks ______________________________________________________________________ The information transmitted, including any attachments, is intended only for the person or entity to

Can someone please help with the error message below -- thanks! Warning messages: 1: Not plotting observations with leverage one: 7 2: Not plotting observations with leverage one: 7 > print(qqPlot(fit),envelop=.95); Error in model.frame.default(formula = Y ~ X - 1, drop.unused.levels = TRUE) : variable lengths differ (found for 'X') In addition: Warning message: In matrix(yhat, n,

For a set of data showing seasonality (related to the 4th quarter), ncv test shows p-value of 0.008 which rejects the null hypothesis of constant-variance. Currently a linear LM relationship is being applied to the data. Should white's error be used to correct the non-constant variance? Are the p-values of the coefficients unreliable? thanks

For example: How to make R write out: Balance = 2 + 3 * IntGDP + 5 * IntUnemployment + 0.3 * d1 from the table below: Balance Intercept IntGDP GDPNum IntUnemployment IntInflation d1 d2 d3 30000 2 3 5 0.3 0 0 and if I have 20 rows, how to make it a batch process? thanks

Dear All, I would like to fit some parametric survival models using left truncated, right censored data in R. However I am having problems finding a function to fit parametric survival models which can handle left truncated data. I have tested both the survreg function in package survival: fit1 <- survreg(Surv(start, stop, status) ~ X + Y + Z, data=data1) and the psm function in package

Dear R community, I'm trying to graphically illustrate my data with a worlmap. Unfortunately, my data is partly on country basis and partly on regional basis (e.g. certain African countries are aggregated to one region). I am using the package rwoldmap. The data on country basis can be mapped, but our defined regions cannot be identified in R. Therefore, all the countries in these

Dear All, We are currently working with very large datasets which even in R require a lot of calculation time. Is there an option of including a function/ tool or something alike which shows the remaining time of calculation? Just to see whether there is any progress or whether anything has crashed and to get a feeling whether we have to wait for 5 min or 30min... Any help is greatly

Hi I was wondering if you ever got better performance out of your Gigabit/IDE/Fc2? I am facing a similar situation. I am running FC2 with Samba 3.x My problem lies in not that I am limited to 10 MBytes per second sustained. I think it's related to this pdflush and how it's buffers are setup. (I have been doing some research and before 2.6 kernels bdflush was the method that was used and

Dear All, at the moment I am using R for calculations of large databases. Unfortunately, R only manages to complete certain operations at some times, and not at others. I usually get the error message "cannot allocate vector of size XX" I am using the 64-bit version with Windows 7. While my computer has 8 RAM, I do have a feeling that R cannot use all of it. Searching online, I

Dear Tomas, thank you for looking into this. Here's the output: # number of logical processors - what detectCores() should return out <- system("wmic cpu get numberoflogicalprocessors", intern=TRUE) [1] "NumberOfLogicalProcessors \r" "22 \r" "22 \r" [4] "20 \r"

Hi, I'm getting the following error: "The mapped network drive could not be created because the following error has occured - there are currently no logon servers available to service the logon request" Any ideas? Kind Regards, Mark Parsons. Ernst & Young is proud to bring you Entrepreneur Of The Year - the prestigious global business awards for entrepreneurs.

Hi All - Quick question. Is there anyway that when a user first invokes Samba to map to a network share that they are asked to change their (samba) password. I've got a whole bunch of (samba) users who all have been given the same password and I want them to have to change it to one of their own choosing upon first login. Kind Regards, Mark Parsons Ernst & Young is proud to bring

Dear Tomas, thank you very much. I installed r-devel r75201 and tested. The machine with 88 cores has NUMA disabled. It therefore has 2 processor groups with 64 and 24 processors each. require(parallel) detectCores() # [1] 88 This is great! Then I went on to test with a simple 'foreach()' loop. I started with 64 processors (max limit of 1 processor group). I ran with a simple function