Category Archives: Programming Languages

Scatter Plot using R

ABOUT SCATTER PLOT A scatter plot (also called a scatterplot, scatter graph, scatter chart, scattergram, or scatter diagram) [3] is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. If the points are color-coded, one additional variable can be displayed. The data …

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Erlang Tinkering

ABOUT ERLANG Erlang (/ˈɜːrlæŋ/ UR-lang) is a general-purpose, concurrent, functional programming language, as well as a garbage-collected runtime system. The term Erlang is used interchangeably with Erlang/OTP, or OTP, which consists of the Erlang runtime system, a number of ready-to-use components mainly written in Erlang, and a set of design principles for Erlang programs.[3] The …

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R boxplot – Produce box-and-whisker plot(s) of the given (grouped) values

R shell session > boxplot function (x, …) UseMethod(“boxplot”) > boxplot(1,2) > boxplot(1,2) > boxplot(1,2,3) > threads levels(threads) [1] “0” “1” “2” “3” “4” “5” “6” “7” “8” “9” > maximum boxplot(threads,maximum) > minimum boxplot(threads,maximum,minimum) > actual boxplot(threads,maximum,minimum,actual) > png(file=”Rboxplot.png”) > boxplot(threads,maximum,minimum,actual) > dev.off() null device 1 > FIXME : create a R boxplot image …

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Hacking with the Erlang Emulator

The erl program starts an Erlang runtime system. The exact details (for example, whether erl is a script or a program and which other programs it calls) are system-dependent. commandline session $erl Erlang R15B01 (erts-5.9.1) [source] [64-bit] [async-threads:0] [kernel-poll:false] Eshell V5.9.1 (abort with ^G) 1> b(). ok 2> double = fun(value) -> 2*value end. ** …

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R barplot for ls command details

commandline session root>R R version 3.1.2 (2014-10-31) — “Pumpkin Helmet” Copyright (C) 2014 The R Foundation for Statistical Computing Platform: x86_64-pc-linux-gnu (64-bit) R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type ‘license()’ or ‘licence()’ for distribution details. Natural language support but running in an …

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