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1 ## Copyright (C) 1996, 1997 John W. Eaton |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 2, or (at your option) |
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8 ## any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} axis (@var{limits}) |
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22 ## Sets the axis limits for plots. |
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23 ## |
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24 ## The argument @var{limits} should be a 2, 4, or 6 element vector. The |
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25 ## first and second elements specify the lower and upper limits for the x |
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26 ## axis. The third and fourth specify the limits for the y axis, and the |
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27 ## fifth and sixth specify the limits for the z axis. |
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28 ## |
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29 ## With no arguments, @code{axis} turns autoscaling on. |
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30 ## |
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31 ## If your plot is already drawn, then you need to use @code{replot} before |
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32 ## the new axis limits will take effect. You can get this to happen |
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33 ## automatically by setting the built-in variable @code{automatic_replot} |
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34 ## to a nonzero value. |
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35 ## @end deftypefn |
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36 |
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37 ## Author: jwe |
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38 |
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39 function curr_axis = axis (ax) |
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40 |
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41 ## This may not be correct if someone has used the gnuplot interface |
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42 ## directly... |
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43 |
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44 global __current_axis__ = [-10, 10, -10, 10]; |
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45 |
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46 if (nargin > 1) |
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47 usage ("axis ([xmin, xmax, ymin, ymax, zmin, zmax])"); |
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48 endif |
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49 |
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50 if (nargin == 0) |
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51 gset autoscale; |
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52 curr_axis = __current_axis__; |
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53 elseif (is_vector (ax)) |
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54 |
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55 len = length (ax); |
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56 |
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57 if (len != 2 && len != 4 && len != 6) |
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58 error ("axis: expecting vector with 2, 4, or 6 elements"); |
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59 endif |
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60 |
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61 __current_axis__ = reshape (ax, 1, len); |
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62 |
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63 if (len > 1) |
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64 eval (sprintf ("gset xrange [%g:%g];", ax (1), ax (2))); |
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65 endif |
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66 |
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67 if (len > 3) |
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68 eval (sprintf ("gset yrange [%g:%g];", ax (3), ax (4))); |
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69 endif |
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70 |
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71 if (len > 5) |
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72 eval (sprintf ("gset zrange [%g:%g];", ax (5), ax (6))); |
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73 endif |
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74 |
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75 else |
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76 error ("axis: expecting no args, or a vector with 2, 4, or 6 elements"); |
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77 endif |
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78 |
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79 endfunction |
