[R] heatmap and continuous variable

Matthias Kohl Matthias.Kohl at stamats.de
Wed Jun 25 11:36:15 CEST 2008

Hello Hans,

I put an example for heatmap.2 with colored dendrograms and additional 
text under


Hans-Ulrich Klein wrote:
> Gregory Warnes wrote:
>> Hello Hans,
>> Do you need *both* a categorical *and* a continuous variable, or just a
>> continuous variable?
>> -Greg
> Hello Greg,
> I want to visualize survival data above the columns. So my continuous 
> variable is follow up time and my categorical variable indicates the 
> event. As the event has only two states (death or alive), one probably 
> can omit an extra side bar for this variable and represent it by 
> different colors within the plot for the follow up time. If it is 
> easier to place two annotations above the heat map, that would be 
> fine, too.
> Probably the simplest solution is: Just plot numbers (follow up times) 
> in red (death) or blue(alive) above the columns. (Analogous to the 
> sample names under the columns.) I do not know how to do this.
> Regards,
> Hans-Ulrich
>> On 6/24/08 4:51PM , "Hans-Ulrich Klein" <h.klein at uni-muenster.de> wrote:
>>> Dear All,
>>> I want to plot a heat map with annotated columns. Both functions 
>>> heatmap
>>> (stats) and heatmap.2 (gplots) can plot a horizontal side bar that can
>>> be used to visualize a categorical variable. In addition to a
>>> categorical variable, I would like to visualize a continuous variable.
>>> This could be done by small bars, a curve or simply numbers above the
>>> columns. (The Sample names are already located at the bottom.)
>>> Does someone have example code for this or a similar problem? Is 
>>> this so
>>> special that I have to get down to the lattice package?
>>> Thank you,
>>> Hans-Ulrich

Dr. Matthias Kohl

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