MATLAB Central Newsreader - character matrix

character matrix

Clem — Thu, 15 May 2008 21:11:40 -0400

Hello everyboby

I would like to generate a matrix of characters. (see below)

S0 = ['ascii_plans_x_1600.dat',
'ascii_plans_x_1800.dat',
'ascii_plans_x_2000.dat',
'ascii_plans_x_2200.dat',
'ascii_plans_x_2400.dat',
'ascii_plans_x_2600.dat',
'ascii_plans_x_2800.dat',
'ascii_plans_x_3000.dat',
'ascii_plans_x_3200.dat',
'ascii_plans_x_3400.dat'];

I am able to generate the name of the file automatically by the following command (each time, the value 1600 is replaced by the value given to 'i')

s = 'ascii_plans_x_1600.dat';
s1 = '1600';
for i=1600:100:4800

    s2 = num2str(i);
    X= strrep(s, s1, s2)
end

but I am not able to put them in a matrix. I have the result line by line, I can not link them together.

If someone has an idea, I would really appreciate.

Clementine

Re: character matrix

us — Thu, 15 May 2008 21:36:02 -0400

Clem:
<SNIP string-creation...

one of the many solutions

     tmpl='asc_%4.4d.dat\n';
     r=strread(sprintf(tmpl,1600:100:2000),'%s');
     r=char(r)
%{
     r=
     asc_1600.dat
     asc_1700.dat
     asc_1800.dat
     asc_1900.dat
     asc_2000.dat
%}

us

Re: character matrix

roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) — Thu, 15 May 2008 21:43:29 -0400

In article <28364413.1210885931460.JavaMail.jakarta@nitrogen.mathforum.org>,
Clem <c_vezier@hotmail.com> wrote:
>Hello everyboby

>I would like to generate a matrix of characters. (see below)

>S0 = ['ascii_plans_x_1600.dat',
>'ascii_plans_x_1800.dat',
>'ascii_plans_x_2000.dat',
>'ascii_plans_x_2200.dat',
>'ascii_plans_x_2400.dat',
>'ascii_plans_x_2600.dat',
>'ascii_plans_x_2800.dat',
>'ascii_plans_x_3000.dat',
>'ascii_plans_x_3200.dat',
>'ascii_plans_x_3400.dat'];

Note that comma (',') is the horizontal concatenation operator,
so the result of the above would be a single long string.

If every line in the array is exactly the same size, change the
commas to semicolons (';') to use the vertical concatenation operator:

S0 = ['ascii_plans_x_1600.dat';
'ascii_plans_x_1800.dat';
'ascii_plans_x_2000.dat';
'ascii_plans_x_2200.dat';
'ascii_plans_x_2400.dat';
'ascii_plans_x_2600.dat';
'ascii_plans_x_2800.dat';
'ascii_plans_x_3000.dat';
'ascii_plans_x_3200.dat';
'ascii_plans_x_3400.dat'];

If you need an array in which the strings can be different sizes, then
you should use a cell array:

S0 = {'ascii_plans_x_1600.dat',
'ascii_plans_x_1800.dat',
'ascii_plans_x_2000.dat',
'ascii_plans_x_2200.dat',
'ascii_plans_x_2400.dat',
'ascii_plans_x_2600.dat',
'ascii_plans_x_2800.dat',
'ascii_plans_x_3000.dat',
'ascii_plans_x_3200.dat',
'ascii_plans_x_3400.dat'};

Notice the change from [] to {}.
--
  "I think Walter's legacy will be that of a man with a God-given
  ability that got the most out of it at every possible chance."
                                                  -- Eddie Payton