Creating Dummy Variables in R: A Step-by-Step Guide for Every Unique Value in a Column Based on a Condition

Transferring Images Captured by iPhone onto the WebService Using ASIHTTPRequest Library

Filtering Posts with Selected Tags using Prisma: A Step-by-Step Guide

How R Scales Discrete Variables in ggplot2: A Guide to Overcoming Size Scaling Issues

Comparing Equal NSDates is Returning Them as Not Equal

Using SQL Queries with Column Values for WHERE Clauses

Selecting Patients with All Diseases Using PostgreSQL's Array Aggregation Functionality

Loading Web Pages Programmatically on iPhone Using WebView Control

Merging Matrices in a List of Matrices: A Quicker Approach Using lapply()

Transforming Matrices with Subset-Based Column Indexing Using Logical Indexing, Matrix Operations and R Programming Language