R Dataset / Package boot / cd4
Attachment | Size |
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dataset-33868.csv | 215 bytes |
Documentation |
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On this Picostat.com statistics page, you will find information about the cd4 data set which pertains to CD4 Counts for HIV-Positive Patients. The cd4 data set is found in the boot R package. Try to load the cd4 data set in R by issuing the following command at the console data("cd4"). This may load the data into a variable called cd4. If R says the cd4 data set is not found, you can try installing the package by issuing this command install.packages("boot") and then attempt to reload the data with library("boot") followed by data("cd4"). Perhaps strangley, if R gives you no output after entering a command, it means the command succeeded. If it succeeded you can see the data by typing cd4 at the command-line which should display the entire dataset. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the cd4 R data set. The size of this file is about 215 bytes. CD4 Counts for HIV-Positive PatientsDescriptionThe CD4 cells are carried in the blood as part of the human immune system. One of the effects of the HIV virus is that these cells die. The count of CD4 cells is used in determining the onset of full-blown AIDS in a patient. In this study of the effectiveness of a new anti-viral drug on HIV, 20 HIV-positive patients had their CD4 counts recorded and then were put on a course of treatment with this drug. After using the drug for one year, their CD4 counts were again recorded. The aim of the experiment was to show that patients taking the drug had increased CD4 counts which is not generally seen in HIV-positive patients. Usagecd4 FormatThis data frame contains the following columns:
SourceThe data were obtained from DiCiccio, T.J. and Efron B. (1996) Bootstrap confidence intervals (with Discussion). Statistical Science, 11, 189–228. ReferencesDavison, A.C. and Hinkley, D.V. (1997) Bootstrap Methods and Their Application. Cambridge University Press. -- Dataset imported from https://www.r-project.org. |
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