gibson:teaching:spring-2016:math445:lecture:scripts
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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gibson:teaching:spring-2016:math445:lecture:scripts [2016/02/01 09:07] gibson |
gibson:teaching:spring-2016:math445:lecture:scripts [2016/02/03 13:54] (current) gibson [Logarithmic plots] |
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| <code> | <code> | ||
| Matlab scripting | Matlab scripting | ||
| - | plot, semilogy, semilogx, loglog | + | linestyles and plot modifiers: |
| - | xlabel, ylabel, title, legend, axis, grid, clf, | + | xlabel, ylabel, title, legend, axis, grid, clf, |
| - | linestyles | + | |
| load, save | load, save | ||
| - | what, pwd | + | plot, semilogy, semilogx, loglog |
| + | what, who, pwd, ls | ||
| </code> | </code> | ||
| Line 45: | Line 45: | ||
| <code matlab> | <code matlab> | ||
| - | plotsincos | ||
| - | |||
| >> plotsincos % execute the plotsincos script | >> plotsincos % execute the plotsincos script | ||
| </code> | </code> | ||
| Line 53: | Line 51: | ||
| {{ :gibson:teaching:spring-2016:math445:sincos.png?direct&400 |}} | {{ :gibson:teaching:spring-2016:math445:sincos.png?direct&400 |}} | ||
| - | ===== Markers and line styles ===== | + | ===== Line styles and markers ===== |
| + | |||
| + | The above plotting script used the matlab **linestyle** codes '' 'b-' '' and '' 'r-' '' to generate blue and red curves for $\cos x$ and $\sin x$. Matlab's **help** function provides a pretty good description of how line and marker style codes work. | ||
| + | |||
| + | <code matlab> | ||
| + | |||
| + | >> help plot | ||
| + | |||
| + | % clip out irrelevant stuff here | ||
| + | |||
| + | Various line types, plot symbols and colors may be obtained with | ||
| + | plot(X,Y,S) where S is a character string made from one element | ||
| + | from any or all the following 3 columns: | ||
| + | |||
| + | b blue . point - solid | ||
| + | g green o circle : dotted | ||
| + | r red x x-mark -. dashdot | ||
| + | c cyan + plus -- dashed | ||
| + | m magenta * star (none) no line | ||
| + | y yellow s square | ||
| + | k black d diamond | ||
| + | w white v triangle (down) | ||
| + | ^ triangle (up) | ||
| + | < triangle (left) | ||
| + | > triangle (right) | ||
| + | p pentagram | ||
| + | h hexagram | ||
| + | |||
| + | For example, plot(X,Y,'c+:') plots a cyan dotted line with a plus | ||
| + | at each data point; plot(X,Y,'bd') plots blue diamond at each data | ||
| + | point but does not draw any line. | ||
| + | </code> | ||
| + | |||
| + | ===== Plot modifiers ===== | ||
| + | |||
| + | Some helpful commands for modifying plots | ||
| + | |||
| + | <code matlab> | ||
| + | xlabel('foo') % add an x label | ||
| + | ylabel('bar') % add a y label | ||
| + | title('baz') % add a title | ||
| + | legend('first', 'second', 'third') % add a legend with these labels | ||
| + | axis on % turn on axes and ticks (default) | ||
| + | axis off % turn off axes and ticks | ||
| + | axis square % make the plot square | ||
| + | axis equal % scale the x and y axes the same | ||
| + | axis([xmin xmax ymin ymax]) % force these specific bounds on the axes | ||
| + | grid on % turn on grid markers | ||
| + | grid off % turn off grid markers | ||
| + | hold on % hold the current plot; the next plot will be plotted on top of this one | ||
| + | hold off % release the current plot; the next plot will erase this one | ||
| + | clf % clear figure (erase current plot) | ||
| + | figure(2) % open new figure window, numbered 2 | ||
| + | </code> | ||
| - | The above plotting script used the matl'' 'r-' '' and '' 'b-' '' to generate | ||
gibson/teaching/spring-2016/math445/lecture/scripts.1454346434.txt.gz · Last modified: 2016/02/01 09:07 by gibson
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