Re: Multiple input()

[Miquel Cabanas]

hello,

On Thu, Nov 18, 2004 at 09:10:28PM -0700, Joe Koski wrote:
>
> Have any changes/updates allowed prompting for the reading a specified
> number of values? Is there a "workaround" that uses scanf(template,"C"), or
> similar constructs, that allows the number of inputs to vary from run to
> run? 
> 
> For a simple data plot display, I would like to ask: "How many columns to
> plot?: 3". (That I can do.) Then I would enter a varying number of column ID
> numbers, e.g. 5,10,15. Or, better yet, just count three entries and produce
> the plots.
> 

some time ago I wrote an improved version of the menu() function
to be able to select several options. As you will notice, I used
input() to read several numbers as a string, and then splitted the
string into substrings and converted those back into numbers. The
relevant portion of the code is,

      s = input ("pick one or more numbers separated by spaces: ", "s");
      ## now check that s is a string, split it into substrings,
      ## convert the substrings to numbers, and then check that
      ## values are valid

      eval (sprintf ("num = str2num (s);"), "num = [];");
      if (! any (is_vector (num)) || any (num < 1) || any(num > nopt))
        printf ("\nerror: some input invalid or out of range\n\n");
      else
        num = sort (num);
        break;
      endif

Hope this helps,

Miquel

-- 
Miquel E Cabanas ------------------------------------------------------
SeRMN, Universitat Autonoma de Barcelona (address@hidden)
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mult_choice.m
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