Octave Basics: Difference between revisions
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(→Scripts and functions: Overhaul.) |
(→Programming elements: Overhaul.) |
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=== Scripts and functions === | === Scripts and functions === | ||
<code>@</code> , | <code>@</code> , <code>function</code> , <code>return</code> , {{manual|nargin}} , {{manual|nargout}} , {{manual|varargin}} , {{manual|varargout}} , {{manual|feval}} , {{manual|eval}} | ||
<syntaxhighlight lang="octave"> | <syntaxhighlight lang="octave"> | ||
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=== Programming elements === | === Programming elements === | ||
< | <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 18:36, 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