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13 results for “from:Isabella Ghement”

Unexpected behavior for as.date()
Isabella Ghement · Nov 12, 2009 · r-help

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Baseline + Follow-Up
Isabella Ghement · Feb 18, 2010 · r-sig-mixed-models

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Baseline + Follow-Up
Isabella Ghement · Feb 18, 2010 · r-sig-mixed-models

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Gage R & R
Isabella Ghement · Jul 8, 2008 · r-help

Hello, Could you let me know if there any R packages available for performing Gage R & R studies. Thank you! Sincerely, Isabella Isabella R. Ghement, Ph.D. Ghement Statistical Consulting Company 301-7031 Blundell Road, Richmond, B.C., Canada, V6Y...

Array to GeoTiff
Isabella Ghement · Apr 12, 2010 · r-sig-geo

Hi everyone, I need to create a multi-band GeoTiff file from a 3-dimensional R array whose 3rd dimension is used to represent bands. Can anyone let me know how to best proceed? I played around with writeRGDAL but...

Unexpected behaviour for as.date()
Isabella Ghement · Nov 10, 2009 · r-help

Hi everyone, I am trying to use the function as.date() from the "dates" package in R 2.10.0 to convert a character date to a Julian date, as follows: > as.date("02-MAY-01", order="mdy") # convert May...

Comparing Proportions Among Groups
Isabella Ghement · Apr 8, 2009 · r-help

Hi everyone, I am trying to compare proportions among groups using the logistic regression approach as follows: 1) Fit the model log(p_i/(1-p_i)) = M + G_i, where p_i is the probability of success in group...

Baseline + Follow-Up
Isabella Ghement · Feb 3, 2010 · r-sig-mixed-models

Hi everyone, I am using the lme() function in the nlme library to fit a linear mixed effects model such as the one below, where an individual-level follow-up measurement is modeled as a linear function of an individual...

Baseline + Follow-Up
Isabella Ghement · Feb 3, 2010 · r-sig-mixed-models

Thank you so much, Douglas! I am not familiar with the "0" trick - can you provide me with some intuition for why this might work? Isabella -----Original Message----- From: dmbates at gmail.com [mailto:dmbates at gmail.com]On Behalf...

[Rcpp-devel] Rcpp installation problem on Windows XP
Isabella Ghement · Mar 19, 2012 · rcpp-devel

Hello, ? I am trying to get the "Rcpp" and "inline" libraries to work with R 2.14.2 on a Windows XP platform and have followed all of the instructions I was able to find with Google's help: ? ? ? ? ? 1...

Serial Correlation Test for Short Time Series
Isabella Ghement · Dec 29, 2008 · r-help

Hello, Are there any R functions available for performing a serial correlation test for short time series (e.g, series having between 10-14 observations)? Many thanks! Isabella R. Ghement, Ph.D. Ghement Statistical Consulting Company 301-7031 Blundell Road...

Unexpected behaviour for as.date()
Isabella Ghement · Nov 10, 2009 · r-help

Hi Berwin, Many thanks for your fast reply! It's evening time in Vancouver, Canada but it must be day time in Australia, so good day to you. Sorry about the confusion regarding the library name - I am using the...

Unexpected behaviour for as.date()
Isabella Ghement · Nov 10, 2009 · r-help

Hi David, Thank you so much for your reply - the quick answer is that I inherited the R code I am working with from someone else so I am trying to use the same functions they have used. In hindsight...

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