Articles by Marc in the box

Converting values to color levels

September 12, 2011 | Marc in the box

     Adding color to a plot is helpful in many situations for visualizing an additional dimension of the data. Again, I wrote the below function "val2col" in R after having coded this manually over and over in the past. It uses similar arguments as the image function in that one ... [Read more...]

Adding a scale to an image plot

August 31, 2011 | Marc in the box

Here's a function that allows you to add a color scale legend to an image plot (or probably any plot needing a z-level scale). I found myself having to program this over and over again, and just decided to make a plotting function for future use. While I really like ... [Read more...]

Image color palette replacement

June 9, 2011 | Marc in the box

Here is an example of a function I wrote to change the color palette used in an image. The above example comes from a black and white original, although color images can also be used. The function first converts the image to grayscale in order to have ...
[Read more...]
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