I am quiet new to this, I have a CGH dataset which I downloaded from NCBI GEO and from this I just want to know how I am able to tell whether there was a gain or a loss. There is a normalised log2ratio column which I believe is indicating the cy3/cy5 ratio. Below is a snapshot of the data.
Help will be quiet appreciated. My question is by looking at this data, how do you tell which one is a gain or a loss and at which location did the gain occur. Again the data was generated from an Agilent Microarray.