Problem to identy gene symbol from ref id

Question

[bookorg]

Hi I faced a massive problem .I want to analyze a GEO dataset to see the differentialy expressed genes through limma packages.But when i download the dataset I saw that there was ref id instead of gene symbol .So my question is how i can convert the ref id into gene symbol in R in that case??

Answer 1

[rpolicastro]

See this related post - Translating gene names to entrez id's

Both biomaRt and the org.db packages can convert from ref ids to gene symbols also.

[bookorg]

thank you so much for your reply. but my gene id is like that-ID_REF" 1007_s_at 1053_at 117_at 121_at 1255_g_at 1294_at 1316_at 1320_at 1405_i_at 1431_at 1438_at 1487_at so how can i find my gene id from that in R

[sebastian.gregoricchio]

Your IDs look like to be Affymetryx probe IDs. Have a look at this GeneExpression probe list tables to convert the probes in gene names.