I am bit lost with the heatmap in R.
I have 4 groups of sample, group 1 (untreated) has 5 sample, group2 (treatment1) has 15 samples, group3 (treatment2) has 11 samples and group4 (treatment3) has 21 samples.
The question that I am trying to answer is to generate a heatmap, that can point the DEG across these groups. The values are in log2.
I know, how to do this in R with two samples (Control Vs Treatment) but not with so many samples with different types of treatments.
A figure like this will be helpful: https://www.google.be/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwiXq6iO19PJAhVFuBoKHdJQATsQjRwIBw&url=http%3A%2F%2Fwww.mdpi.com%2F1422-0067%2F16%2F10%2F24555%2Fhtm&psig=AFQjCNFUuwoZ-A9VIBWPow7E81Izai33tw&ust=1449918885050234
Or even better representation is welcomed.
Also, How could one find DEG across all groups with some p-value associated with it
Can anyone help?