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7 results for “from:Bingzhang Chen”

How to estimate confidential intervals for the derivatives of cubic smoothing spline
Bingzhang Chen · Aug 5, 2011 · r-help

Dear all, I want to use smooth.spline to construct a cubic smoothing spline and its first derivative to my data. However, the predict.smooth.spline does not seem to provide a SE for both the fitted values and their...

Italicize Greek symbols in axis
Bingzhang Chen · Jun 21, 2011 · r-help

Hello there, Is there any way to italicize Greek symbols such as mu in axis? From the help files of mathematical anotations: "Note that bold, italic and bolditalic do not apply to symbols, and hence not to the Greek symbols...

Problem in NMDS
Bingzhang Chen · Jan 20, 2010 · r-help

Hi, I am stuck in one problem when doing nonmetric multidimensional scaling. I use the function 'metaMDS' in the package 'vegan' to work on the presence/absence community data. The problem is when two samples are identical (dissimilarity = 0), metaMDS...

How to change font family in a levelplot using Lattice
Bingzhang Chen · Oct 20, 2011 · r-help

Dear R users: I want to assign a global font family to a levelplot such as par(family="serif") in traditional plotting. However, I can only change part of the text using panel.text(x,y,"A",fontfamily="serif") or...

Pass additional arguments to do.call(grid.arrange, plots)
Bingzhang Chen · Feb 15, 2015 · r-help

Hi R users, I have a problem on how to pass an extra argument to do. call: The example codes are: #-------------------------------------------- require(ggplot2) plots = lapply(1:5, function(.x) qplot(1:10,rnorm(10), main=paste("plot",.x))) require(gridExtra...

Problem with ode
Bingzhang Chen · Apr 9, 2013 · r-help

Hi, I am trying to run a 1D nutrient-phytoplankton-zooplankton model in R using the package 'deSolve'. The code is shown below: DEPTH = seq(2.5, 147.5, 5) NPZ = function(t, state, params){ with(as.list(params), { P...

回复: Italicize Greek symbols in axis
Bingzhang Chen · Jun 21, 2011 · r-help

Prof. Ripley, Thanks. A stupid question: how to find out the codes (e.g.,u03bc) for the Greek letters? I am trying to italicize the mu in a mathematical expression placed as a label for an axis of a graph...

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