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− | = The very basics = | + | For the meaning of operators, see the [https://octave.org/doc/interpreter/Operator-Index.html GNU Octave manual]. |
− | <tt>+ | - | * | / | ^ | pi | i | e | inf | eps | sin | cos | tan | exp | log | log10 | abs | sqrt | sign | round | ceil | floor | fix | = | , | ; | who | clear | help | lookfor</tt> | + | |
− | x = pi, y = floor (sin (x)), z = log (exp (2013)), z / inf ↵
| + | === The very basics === |
| + | |
| + | <code>+</code> , <code>-</code> , <code>*</code> , <code>/</code> , <code>^</code> , {{manual|pi}} , {{manual|I}} , {{manual|e}} , {{manual|inf}} , {{manual|eps}} , {{manual|sin}} , {{manual|cos}} , {{manual|tan}} , {{manual|exp}} , {{manual|log}} , {{manual|log10}} , {{manual|abs}} , {{manual|sqrt}} , {{manual|sign}} , {{manual|round}} , {{manual|ceil}} , {{manual|floor}} , {{manual|fix}} , <code>=</code> , <code>,</code> , <code>;</code> , {{manual|who}} , {{manual|clear}} , {{manual|help}} , {{manual|lookfor}} |
| + | |
| + | <syntaxhighlight lang="octave"> |
| + | x = pi, y = floor (sin (x)), z = log (exp (2013)), z / inf |
| + | </syntaxhighlight> |
| + | |
| + | === Vectors and matrices === |
| + | |
| + | : | .* | ./ | .^ | ' | .' | \ | 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 === |
| | | |
− | = Vectors and matrices =
| |
− | <tt>: | .* | ./ | .^ | ' | .' | \ | length | numel | size | zeros | ones | eye | diag | rand | det | trace | inv | lu | eig | cond | expm</tt>
| |
− | x = 1:5, x(:), x(2:4), A = [11 12; 21, 22], A(1,1:end) ↵
| |
− | = Graphics =
| |
| <tt>plot | semilogx | semilogy | loglog | contour | quiver | surf | mesh | meshgrid | xlabel | ylabel | zlabel | title | grid | axis | hold | subplot | figure | print</tt> | | <tt>plot | semilogx | semilogy | loglog | contour | quiver | surf | mesh | meshgrid | xlabel | ylabel | zlabel | title | grid | axis | hold | subplot | figure | print</tt> |
| 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) ↵ | | 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 = | + | |
| + | === 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) ↵ | | f = @(x) x.^2, f(1:10) ↵ |
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| function v = cossum (x, n) v = cumsum (repmat (cos (x), 1, n)); | | function v = cossum (x, n) v = cumsum (repmat (cos (x), 1, n)); |
| | | |
− | = 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 ↵ | | for i = 1:5 if (i < 3) disp (i) else disp (i^2) end end ↵ |
| | | |
− | = See also = | + | == See also == |
| | | |
− | [https://lists.gnu.org/archive/html/help-octave/2013-01/pdfoEurT8AZ7Z.pdf GNU OCTAVE CARD by Fotios Kasolis] | + | * [https://lists.gnu.org/archive/html/help-octave/2013-01/pdfoEurT8AZ7Z.pdf GNU OCTAVE CARD by Fotios Kasolis] |
| | | |
| [[Category:Tutorials]] | | [[Category:Tutorials]] |