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POhow to use black-and-white fill patterns instead of color coding on Calendar Heatmap
 

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  1. POhow to use black-and-white fill patterns instead of color coding on Calendar Heatmap
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    <p>I'm using <a href="https://twitter.com/pbleic" rel="noreferrer">Paul Bleicher</a>'s <a href="https://github.com/jbryer/makeR/blob/master/R/calendarHeat.R" rel="noreferrer">Calendar Heatmap</a> to visualize some events over time and I'm interested to add <a href="https://www.google.com/search?q=black-and-white+fill+patterns&amp;hl=en&amp;client=firefox-a&amp;hs=ow5&amp;rls=org.mozilla:en-US:official&amp;tbm=isch&amp;tbo=u&amp;source=univ&amp;sa=X&amp;ei=qe4mUd-sCO-zigKnuICoCQ&amp;ved=0CDEQsAQ&amp;biw=1440&amp;bih=716" rel="noreferrer">black-and-white fill patterns</a> instead of (or on top of) the color coding to increase the readability of the Calendar Heatmap when printed in black and white.</p> <p>Here is an example of the Calendar Heatmap look in color,</p> <p><img src="https://i.stack.imgur.com/RPDEk.png" alt="Calendar Heatmap color"></p> <p>and here is how it look in black and white,</p> <p><img src="https://i.stack.imgur.com/r63MC.png" alt="Calendar Heatmap black and white"></p> <p>it gets very difficult to distinguish between the individual levels in black and white.</p> <p>Is there an easy way to get R to add some kind of patten to the 6 levels instead of color?</p> <h3>Code to reproduce the Calendar Heatmap in color.</h3> <pre><code>source("http://blog.revolution-computing.com/downloads/calendarHeat.R") stock &lt;- "MSFT" start.date &lt;- "2012-01-12" end.date &lt;- Sys.Date() quote &lt;- paste("http://ichart.finance.yahoo.com/table.csv?s=", stock, "&amp;a=", substr(start.date,6,7), "&amp;b=", substr(start.date, 9, 10), "&amp;c=", substr(start.date, 1,4), "&amp;d=", substr(end.date,6,7), "&amp;e=", substr(end.date, 9, 10), "&amp;f=", substr(end.date, 1,4), "&amp;g=d&amp;ignore=.csv", sep="") stock.data &lt;- read.csv(quote, as.is=TRUE) # convert the continuous var to a categorical var stock.data$by &lt;- cut(stock.data$Adj.Close, b = 6, labels = F) calendarHeat(stock.data$Date, stock.data$by, varname="MSFT Adjusted Close") </code></pre> <h3>update 02-13-2013 03:52:11Z, what do I mean by <em>adding a pattern</em>,</h3> <p>I envision adding a pattern to the individual day-boxes in the Calendar Heatmap as pattern is added to the individual slices in the pie chart to the right (<strong>B</strong>) in this plot,</p> <p><img src="https://i.stack.imgur.com/zRwlo.jpg" alt="new-features.html#patterns"></p> <p>found <a href="http://www.press.uchicago.edu/journals/an/prep-art.html?journal=an#halftones" rel="noreferrer">here</a> something like the states in <a href="http://www.softill.com/new-features.html#patterns" rel="noreferrer">this plot</a>.</p>
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    1. COWhat do you mean by adding a pettern? You want to change the size of cells? do you want to add text in some cells?
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    2. COyou could in theory overwrite the lattice panel function to use `gridExtra::grid.pattern` instead of `grid.rect`. But it's unlikely to work well as this function is buggy
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    3. CO@agstudy, thank you for your question. I added an update to clarify, but I like your idea of adding a letter or something like it to the individual day-box. Regardless, I initially envisioned some sort of pattern like I have described in the update.
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