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7 results for “from:Dmitry Gospodaryov”

Tool for solving equations
Dmitry Gospodaryov · Sep 28, 2009 · r-help

Does exist any tool in R to solve equations, especially complex exponential equations? For example: y = 100*exp(b*(1-exp(c*x))/c) If it is so, then what is the package i have to use and what is...

Difficulties with the simpest table
Dmitry Gospodaryov · Jun 10, 2009 · r-help

I have the data arranged in table (in Excel, or Notepad): x y 0 100 2 100 4 80 6 40 8 0 I need to transfer these data in R file and then going to operate with x and...

curve fitting
Dmitry Gospodaryov · May 12, 2009 · r-help

I have the data: for x: 2, 8, 14, 20, 26, 32, 38, 44, 50, 56, 62, 68, 74, for y: 100, 99, 99, 98, 97, 94, 82, 66, 48, 38, 22, 10, 1. y depends on x by equation...

response surface designs
Dmitry Gospodaryov · Oct 13, 2009 · r-help

How I can obtain graphics for response surface design, basing on data: x: 0.25, 1, 4, 10, 20. y: 0, 0.5, 1 z1 (for y = 0): 45, 35, 25, 15, 10. z2 (for y = 0.5): 50, 45...

some simple questions regarding survival analysis
Dmitry Gospodaryov · Sep 29, 2009 · r-help

I have two types of survival data for Drosophila cohort. For example: uncensored > age <- c (0, 2, 4, 6, 8, 10) > alive1 <- c(10, 9, 6, 3, 1, 0) > alive 2 <- c(10, 9, 4, 1, 1, 0) and censored...

histogram
Dmitry Gospodaryov · Oct 13, 2009 · r-help

Dear R developers,How I can build a histogram from matrix: 0 0.5 1 0.25 34 43 65 1 23 35 54 4 22 29 42 10 21 22 29 20 15 17 20 (first string is represented...

simple on point bisserial correlation
Dmitry Gospodaryov · May 5, 2010 · r-help

Dear developers of R-project, I have such data height of male persons 181, 178, 182, 160, 187, 193, 184, 184, 175, 178, 184, 184, 174, 185, 175 height of female persons 164, 165, 160, 174, 167, 161, 164, 165...

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