Difference between revisions of "Octave Basics"

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m (Scripts and functions: Regard entries without manual page.)
(Programming elements: Overhaul.)
 
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=== Programming elements ===
 
=== Programming elements ===
  
<tt>== | > | < | >= | <= | != | | || | | & | && | ! | if | else | elseif | for | while |end | break | continue | pause</tt>
+
<code>==</code> , <code>></code> , <code><</code> , <code>>=</code> , <code><=</code> , <code>!=</code> , <code>|</code> , <code>||</code> , <code>&</code> , <code>&&</code> , <code>!</code> , <code>~</code> , <code>if</code> , <code>else</code> , <code>elseif</code> , <code>for</code> , <code>while</code> , <code>end</code> , <code>break</code> , <code>continue</code> , <code>pause</code>
  
 
<syntaxhighlight lang="octave">
 
<syntaxhighlight lang="octave">

Latest revision as of 11:36, 14 June 2019

For the meaning of operators, see the GNU Octave manual.

The very basics[edit]

+ , - , * , / , ^ , pi , I , e , inf , eps , sin , cos , tan , exp , log , log10 , abs , sqrt , sign , round , ceil , floor , fix , = , , , ; , who , clear , help , lookfor

x = pi, y = floor (sin (x)), z = log (exp (2013)), z / inf

Vectors and matrices[edit]

: , .* , ./ , .^ , ' , .' , \ , length , numel , size , zeros , ones , eye , diag , rand , det , trace , inv , lu , eig , cond , expm

x = 1:5, x(:), x(2:4), A = [11 12; 21, 22], A(1,1:end)

Graphics[edit]

plot , semilogx , semilogy , loglog , contour , quiver , surf , mesh , meshgrid , xlabel , ylabel , zlabel , title , grid , axis , hold , subplot , figure , print

t = 0:0.01*pi:21*pi; x = sin (t).*(exp (cos (t)) - 2*cos (4*t) + sin (t/12).^5); y = cos (t).*(exp (cos (t)) - 2*cos (4*t) + sin (t/12).^5); plot(x, y)

Scripts and functions[edit]

@ , function , return , nargin , nargout , varargin , varargout , feval , eval

f = @(x) x.^2, f(1:10)

function v = cossum (x, n) v = cumsum (repmat (cos (x), 1, n));

Programming elements[edit]

== , > , < , >= , <= , != , | , || , & , && , ! , ~ , if , else , elseif , for , while , end , break , continue , pause

for i = 1:5 if (i < 3) disp (i) else disp (i^2) endif endfor

See also[edit]