computation of GPS receiver position based on RINEX observation file

IM getting the error like "undefined function 'read' for input argument of type 'char'".

for the line [obs,rec_xyz]=read('filename');

can anybody help me to solve this error.

Answer 1

[Jim Riggs]

You are using the wrong function to try to read a file.

The function 'read' operates on datastores, or images, or video frames, etc. but not on files.

Answer 2

[Ryan Salvo]

The rinexread function will allow you to read RINEX observation files into MATLAB.