Matthew Lundberg

Matthew Lundberg has asked 11 questions and find answers to 204 problems.

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About

Education: MA Mathematics UM-St.Louis

Languages: Proficient in C++, Java, C, Perl, Assembly Language (x86, AMD64, Itanium, AXP), Currently learning R

Operating Systems: Linux, OpenVMS, Windows Server

I do not have a Facebook or Twitter account.

Matthew Lundberg questions

Lattice Plot - Add lines through mean of y values
Error assigning to a submatrix diagonal with drop=FALSE
Superposed xyplot Panels with Grouped Regression Lines
Draw a quadratic spline through points in lattice
Find common substrings between two character variables
Transpose a List of Lists

Matthew Lundberg answers

selecting rows of which the value of the variable is equal to certain vector
Replacing vector values in R based on a list (hash)
R sample probabilities: Default is equal weight; why does specifying equal weights cause different values to be returned?
How to make a barplot with R from a table?
How can I sum values in a column, grouped by names in rows in R, without listing each name?
unquote dimension names
Convert unix timestamp column to day of week in R
How to add a named vector as a row to a data frame, reordered according to column name order?
In a shell script, how can you combine both `Rscript` and `Unix` commands?
Reading large files into R