timelyportfolio

This example demonstrates loading of CSV data, which is then quantized into a diverging color scale. The values are visualized as colored cells per day. Days are arranged into columns by week, then grouped by month and years. Colors by Cynthia Brewer. Layout inspired by Rick Wicklin and Robert Allison. Dow Jones historical data copyright Yahoo! Finance or independent data provider; fair use for educational purposes.

timelyportfolio

if (!require(quantmod)) {
  stop("This app requires the quantmod package. To install it, run 'install.packages(\"quantmod\")'.\n")
}

# Download data for a stock, if needed
require_symbol <- function(symbol) {
  if (!exists(symbol))
    getSymbols(symbol, from = "1900-01-01")
}

timelyportfolio

Horizon charts combine position and color to reduce vertical space. Start with a standard area chart, then mirror negative values (in blue) or offset them vertically. Click the + button above to increase the number of bands, turning the area into a horizon.

Implemented with the d3.horizon plugin.

timelyportfolio

<?php
/*
 * Converts CSV to JSON
 * Example uses Google Spreadsheet CSV feed
 * csvToArray function I think I found on php.net
 */

header('Content-type: application/json');

// Set your CSV feed