Octave Basics: Difference between revisions

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173 bytes added ,  14 June 2019
Improve syntaxhighlight.
(→‎Graphics: Overhaul.)
(Improve syntaxhighlight.)
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<code>:</code> , <code>.*</code> , <code>./</code> , <code>.^</code> , <code>'</code> , <code>.'</code> , <code>\</code> , {{manual|length}} , {{manual|numel}} , {{manual|size}} , {{manual|zeros}} , {{manual|ones}} , {{manual|eye}} , {{manual|diag}} , {{manual|rand}} , {{manual|det}} , {{manual|trace}} , {{manual|inv}} , {{manual|lu}} , {{manual|eig}} , {{manual|cond}} , {{manual|expm}}
<code>:</code> , <code>.*</code> , <code>./</code> , <code>.^</code> , <code>'</code> , <code>.'</code> , <code>\</code> , {{manual|length}} , {{manual|numel}} , {{manual|size}} , {{manual|zeros}} , {{manual|ones}} , {{manual|eye}} , {{manual|diag}} , {{manual|rand}} , {{manual|det}} , {{manual|trace}} , {{manual|inv}} , {{manual|lu}} , {{manual|eig}} , {{manual|cond}} , {{manual|expm}}


  x = 1:5, x(:), x(2:4), A = [11 12; 21, 22], A(1,1:end) &crarr;
<syntaxhighlight lang="octave">
x = 1:5, x(:), x(2:4), A = [11 12; 21, 22], A(1,1:end)
</syntaxhighlight>


=== Graphics ===
=== Graphics ===
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{{manual|plot}} , {{manual|semilogx}} , {{manual|semilogy}} , {{manual|loglog}} , {{manual|contour}} , {{manual|quiver}} , {{manual|surf}} , {{manual|mesh}} , {{manual|meshgrid}} , {{manual|xlabel}} , {{manual|ylabel}} , {{manual|zlabel}} , {{manual|title}} , {{manual|grid}} , {{manual|axis}} , {{manual|hold}} , {{manual|subplot}} , {{manual|figure}} , {{manual|print}}
{{manual|plot}} , {{manual|semilogx}} , {{manual|semilogy}} , {{manual|loglog}} , {{manual|contour}} , {{manual|quiver}} , {{manual|surf}} , {{manual|mesh}} , {{manual|meshgrid}} , {{manual|xlabel}} , {{manual|ylabel}} , {{manual|zlabel}} , {{manual|title}} , {{manual|grid}} , {{manual|axis}} , {{manual|hold}} , {{manual|subplot}} , {{manual|figure}} , {{manual|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) &crarr;
<syntaxhighlight lang="octave">
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)
</syntaxhighlight>


=== Scripts and functions ===
=== Scripts and functions ===


<tt>@ | function | return | nargin | nargout | varargin | varargout | feval | eval</tt>
<tt>@ | function | return | nargin | nargout | varargin | varargout | feval | eval</tt>
f = @(x) x.^2, f(1:10) &crarr;


function v = cossum (x, n) v = cumsum (repmat (cos (x), 1, n));
<syntaxhighlight lang="octave">
f = @(x) x.^2, f(1:10)
 
function v = cossum (x, n) v = cumsum (repmat (cos (x), 1, n));
</syntaxhighlight>


=== Programming elements ===
=== Programming elements ===


<tt>== | > | < | >= | <= | != | | || | | & | && | ! | if | else | elseif | for | while |end | break | continue | pause</tt>
<tt>== | > | < | >= | <= | != | | || | | & | && | ! | if | else | elseif | for | while |end | break | continue | pause</tt>
for i = 1:5 if (i < 3) disp (i) else disp (i^2) end end &crarr;
 
<syntaxhighlight lang="octave">
for i = 1:5 if (i < 3) disp (i) else disp (i^2) endif endfor
</syntaxhighlight>


== See also ==
== See also ==

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