In Matlab

ID and name conversion is one of the common tasks in Bioinformatics. In this problem, you will write a function symbol=geneidtosymbol(id,filename) that will return the symbol of a gene, given its GeneID. The GeneID to symbol conversion should be looked up from a file named "gene_info.txt". Each line in this file contains tab-delimited information for a gene. The first line of the file specifies what type of information is available in each column. Download and use the sample file available from http://sacan.biomed.drexel.edu/ftp/bmes201/final.20123/gene_info.txt (which contains the first 100 lines of the file available from: ftp://ftp.ncbi.nlm.nih.gov/gene/DATA/gene_info.gz). You should manually download this file (either using your browser or urlwrite() in command window); do not try to download the file in your function. If filename is not given, use gene_info.txt. If it is given (may be different than gene_info.txt), use the filename provided as input.

>> disp(geneidtosymbol(1246500,'gene_info.txt')) repA1