[BioC] the order of the column name in heatmap

[xiangxue Guo]

HI,

Does anybody know how to control the order of the column names displaying in the heatmap (heatplot)? 

I was trying to compare two heatmaps with same set of genes as row names and same set of patient samples as column names. The result shows a different order of column names.

I want they display in the same order in the heatmap pictures. 

regards,

Xiang