Text, Cell Arrays und Strukturen

s = 'Hallo Welt';
length(s)
upper(s)
lower(s)
s(1:5)
s(end:-1:1)
[s ' und Octave']
strcat('a', 'b', 'c')
strrep(s, 'Welt', 'MATLAB')
strfind(s, 'l')
strsplit('a,b,c', ',')
strjoin({'x', 'y', 'z'}, '-')
strtrim('   getrimmt   ')
strcmp('abc', 'abc')
strcmpi('ABC', 'abc')
num2str(3.14159)
num2str(42)
str2num('7 + 1')
str2double('2.5')
sprintf('%05.1f|%-5s|%d', 3.14159, 'ab', 42)
regexprep('a1b22', '\d+', '#')
regexp('Preis: 12 und 34', '\d+', 'match')
double('A')
char(72, 105)
char([72 105])
isspace('a b')
fliplr('abc')
strcmp({'a', 'b', 'a'}, 'a')
upper({'x', 'y'})
numel(sprintf('%d', 12345))

ans = 10
ans = HALLO WELT
ans = hallo welt
ans = Hallo
ans = tleW ollaH
ans = Hallo Welt und Octave
ans = abc
ans = Hallo MATLAB
ans =

   3   4   9

ans =
{
  [1,1] = a
  [1,2] = b
  [1,3] = c
}

ans = x-y-z
ans = getrimmt
ans = 1
ans = 1
ans = 3.1416
ans = 42
ans = 8
ans = 2.5000
ans = 003.1|ab   |42
ans = a#b#
ans =
{
  [1,1] = 12
  [1,2] = 34
}

ans = 65
ans =

H
i

ans = Hi
ans =

  0  1  0

ans = cba
ans =

  1  0  1

ans =
{
  [1,1] = X
  [1,2] = Y
}

ans = 5

c = {1, 'Text', [1 2 3], {4, 5}}
class(c)
size(c)
c{2}                          % geschweifte Klammern: Inhalt
class(c{3})
class(c(3))                   % runde Klammern: wieder ein Cell
c{3}(2)
c{end + 1} = 'neu';
numel(c)
namen = {'Mia', 'Tom', 'Zoe'};
laengen = cellfun(@length, namen)
grossbuchstaben = cellfun(@upper, namen, 'UniformOutput', false)
sortiert = sort(namen)
ismember('Tom', namen)
find(strcmp(namen, 'Zoe'))
cell2mat({1 2; 3 4})
num2cell([1 2 3])

c =
{
  [1,1] = 1
  [1,2] = Text
  [1,3] =

     1   2   3

  [1,4] =
  {
    [1,1] = 4
    [1,2] = 5
  }

}

ans = cell
ans =

   1   4

ans = Text
ans = double
ans = cell
ans = 2
ans = 5
laengen =

   3   3   3

grossbuchstaben =
{
  [1,1] = MIA
  [1,2] = TOM
  [1,3] = ZOE
}

sortiert =
{
  [1,1] = Mia
  [1,2] = Tom
  [1,3] = Zoe
}

ans = 1
ans = 3
ans =

   1   2
   3   4

ans =
{
  [1,1] = 1
  [1,2] = 2
  [1,3] = 3
}

person.name = 'Mia';
person.alter = 17;
person.hobbys = {'Lesen', 'Judo'};
person
person.alter = person.alter + 1;
disp(person.alter)
fieldnames(person)'
isfield(person, 'name')
isfield(person, 'stadt')
person = rmfield(person, 'hobbys');
fieldnames(person)'
feld = 'alter';
person.(feld)                 % dynamischer Feldname

leute(1).name = 'Mia'; leute(1).alter = 17;
leute(2).name = 'Tom'; leute(2).alter = 25;
leute(3).name = 'Zoe'; leute(3).alter = 31;
numel(leute)
{leute.name}
[leute.alter]
mean([leute.alter])
leute([leute.alter] > 20).name
s = struct('x', {1, 2, 3}, 'y', 'gleich');
size(s)
arrayfun(@(p) numel(p.name), leute)

person =

  scalar structure containing the fields:

    name = Mia
    alter = 17
    hobbys =
    {
      [1,1] = Lesen
      [1,2] = Judo
    }


18
ans =
{
  [1,1] = name
  [1,2] = alter
  [1,3] = hobbys
}

ans = 1
ans = 0
ans =
{
  [1,1] = name
  [1,2] = alter
}

ans = 18
ans = 3
ans =
{
  [1,1] = Mia
  [1,2] = Tom
  [1,3] = Zoe
}

ans =

   17   25   31

ans = 24.333
ans = Tom
ans = Zoe
ans =

   1   3

ans =

   3   3   3

m = containers.Map();
m('Mia') = 17;
m('Tom') = 25;
m('Zoe') = 31;
m.Count
m('Tom')
isKey(m, 'Ben')
keys(m)
values(m)
m.remove('Tom');
m.keys()
zaehler = containers.Map('KeyType', 'char', 'ValueType', 'double');
for wort = strsplit('a b a c a b', ' ')
    w = wort{1};
    if isKey(zaehler, w)
        zaehler(w) = zaehler(w) + 1;
    else
        zaehler(w) = 1;
    end
end
cellfun(@(k) sprintf('%s:%d', k, zaehler(k)), keys(zaehler), 'UniformOutput', false)

ans = 3
ans = 25
ans = 0
ans =
{
  [1,1] = Mia
  [1,2] = Tom
  [1,3] = Zoe
}

ans =
{
  [1,1] = 17
  [1,2] = 25
  [1,3] = 31
}

ans =
{
  [1,1] = Mia
  [1,2] = Zoe
}

ans =
{
  [1,1] = a:3
  [1,2] = b:2
  [1,3] = c:1
}