FTP server returns blank directories and files

Hello Everyone, I am having a basic issue accessing data from an NOAA FTP server. I am unsure as to whether this is a firewall problem or not. When I execute the code below I am shown a blank directory even though I know there are files within the directory in question.

Any help or suggestions would be appreciated.

 %connect to ftp server
ftpobj = ftp('ftp.ncep.noaa.gov')
cd(ftpobj,'pub/data/nccf/com/nwps/prod/er.20180730/mhx/12/CG1/')
listing = dir(ftpobj)

Outputs look like below:

ftpobj =

FTP Object
   host: ftp.ncep.noaa.gov
   user: anonymous
    dir: /
   mode: binary

ans =

    '/pub/data/nccf/com/nwps/prod/er.20180730/mhx/12/CG1'

listing =

     []

Answer 1

[Kojiro Saito]

This is because MATLAB's FTP class does not have passive mode capability. https://www.mathworks.com/matlabcentral/answers/102638-

You can use passive FTP mode by using codes downloaded from this File Exchange.

Or, simply, you can use websave instead.

outfilename = websave('mhx_nwps_CG1_20180730_1200.grib2', 'http://www.ftp.ncep.noaa.gov/data/nccf/com/nwps/prod/er.20180730/mhx/12/CG1/mhx_nwps_CG1_20180730_1200.grib2');

[Stijn Stuart]

I'm having exactly the same problem as Russell.

When using websave, i'm getting the below error message because the ftp://... instead of http://... protocol is not suported by websave.

Error using websave (line 94)

The 'ftp' protocol specified in URL, 'ftp://ftp.strukton.com/UrlsLeanTamping.txt', is not supported. Specify the URL with the protocol 'http://' or 'https://'.

[Kojiro Saito]

websave supports http or https protocol.

The URL might be 'https://ftp.strukton.com/UrlsLeanTamping.txt'.