Re: textread...read first and last row

[Andrew Janke]

On 3/16/19 7:18 AM, turbofib wrote:
> hi,
> look that
>
> 01/04/2008 0.00000 0 0.00000 0.00000 0
> 02/04/2009 -600.00000 0 0.00000 931.25000 1
> 03/04/2010 750.00000 1 0.00000 1362.50000 2
> 04/04/2011 12.50000 1 -18.75000 1000.00000 2
> 05/04/2012 0.00000 0 0.00000 0.00000 2
> 06/04/2013 -256.25000 1 12.50000 343.75000 2
> 07/04/2014 -6.25000 1 0.00000 575.00000 2
> 08/04/2015 -1100.00000 0 12.50000 1556.25000 2
>
> i want catch the first and the last row with textread (i want catch only
> date)
>
> the number of lines is not fixed
>
> here i catch the first row (year 2008)
> [datInizio]=textread (nomeFileDaEsaminare, "%s ",1);
>
> how can i code to catch the last row?(year 2015)
>
> thank to help me

You can use fopen()/fgetl() to do line-oriented input. Something like this:

fid = fopen(nomeFileDaEsaminare);
firstLine = fgetl(fid);
lastLine = [];
while true
  line = fgetl(fid);
  if line == -1
    break
  end
  lastLine = liine;
end
fclose(fid);

You could also use textscan() to read the whole file in tabular format, 
and then extract the first and last rows of data. This is probably more 
useful and flexible for you.

fid = fopen(nomeDileDaEsaminare
c = textscan(fid, "%s %f %f %f %f %f")
fclose(fid);
firstLineData = c(1,:);
lastLineData = c(end,:);

Cheers,
Andrew