[R] A question about Heatmap for data with just 2 columns

hadley wickham h.wickham at gmail.com
Wed Oct 15 02:34:59 CEST 2008

Why not use a scatterplot?  That will be far far better for your
purpose than a heatmap.


On Tue, Oct 14, 2008 at 4:45 PM, feishi <feishi2 at uic.edu> wrote:
> Hi, I have a question about heatmap. I have a data with row as microRNA and
> two columns are two cell expression values for these microRNA. So, like:
>              cell1    cell2
> miRNA1    1.5     3.4
> miRNA2    1.3     2.4
> ...................
> miRNA50    5     2.1
> miRNA51    7.3     0.5
> I want to see some miRNA are high in cell1 and low in cell2 but others are
> low in cell1 and high in cell2. I use heatmap.2(dataset, col=redgreen(50),
> scale="row").
> But I can only see two colors represent high and low values. Actually, i
> want to see there are color variation in high values area too(rather than
> just one color in high value area and one color in low value area). You know
> what I mean? I know I have two columns so they just use two color to
> represent the rank. But i want to see within high value area, there are
> colors represent differences. But i don't think scale argument could be set
> as "both"? Hope you can help me. Thank you.
> --
> View this message in context: http://www.nabble.com/A-question-about-Heatmap-for-data-with-just-2-columns-tp19982839p19982839.html
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